Glossary of water terms meanings

Glossary of water terms meanings

 

A–Horizon meaning Abandoned Water Right meaning Abandoned Well meaning Abandonment (Water Right) meaning Abatement meaning Abiota meaning Ablation meaning Abrasion meaning Abscissa (Symbol X) meaning Abscission meaning Absolute Humidity meaning Absolute Temperature (T) meaning Absolute Zero meaning Absorber meaning Absorption meaning Absorption Loss meaning Absorption Tower meaning Abutment (of a Dam) meaning Abutment Seepage meaning Abyssal meaning Abyssal Zone meaning Acclimatization meaning Accretion meaning Acequia meaning Acid meaning Acid Aerosol meaning Acid Fog meaning Acid-Forming Material meaning Acid Mine Drainage (AMD) meaning Acid Neutralizing Capacity (ANC) meaning Acid Precipitation meaning Acid Rain meaning Acid Soil (Alkaline Soil, Neutral Soil) meaning Acidic meaning Acidification meaning Acidity meaning Acre meaning Acre-Feet (AF) meaning Acre-Foot (AF) meaning Acre-Inch meaning Activated Carbon meaning Activated Carbon Adsorption meaning Activated Sludge meaning Activated Sludge Process meaning Active Conservation Storage meaning Active Fault meaning Active Solar Water Heater meaning Active Storage Capacity meaning Activity meaning Acute meaning Adaptation meaning Adaptive Management meaning Adenosine Triphosphate (ATP) meaning Adequate-Size Farm meaning Adfluvial meaning Adhesion meaning Adiabatic meaning Adiabatic Lapse Rate meaning Adiabatic Process meaning Adit meaning Adjudicate meaning Adjudication meaning Administered Groundwater Basin meaning Adsorbate meaning Adsorbent meaning Adsorber meaning Adsorption meaning Advanced Treatment meaning Advance Time meaning Advection meaning Aedile meaning Aeolian Soil meaning Aerate meaning Aerated Lagoon meaning Aeration meaning Aeration Tank meaning Aeration (Unsaturated) Zone meaning Aerobe meaning Aerobic meaning Aerobic Bacteria meaning Aerobic Decomposition meaning Aerobic Treatment meaning Aerobic Treatment Unit (ATU) meaning Aerodynamic meaning Aeroponics meaning Aerosol meaning Affected Environment meaning Affected Public meaning Affluent (Stream) meaning Afforestation meaning Afterbay meaning Age (of Groundwater) meaning Agglomeration meaning Aggradation meaning Aggrade meaning Aggrading meaning Aggressive Water meaning Agitated Pit meaning Agitator/Mixer meaning Agribusiness meaning Agricultural Drainage meaning Agricultural Drought meaning Agricultural Economics meaning Agricultural Land meaning Agricultural Levee meaning Agricultural Pollution meaning Agricultural Restructuring Scenario (ARS) meaning Agricultural Runoff meaning Agricultural Use meaning Agricultural Water Use (Withdrawals) meaning Agro-Ecosystem meaning Agroindustrial meaning Aground meaning Air meaning Air Binding meaning Air-Bound meaning Air Curtain meaning Air Gap meaning Air Hole meaning Air Injection meaning Air Lock meaning Air Mass meaning Air Padding meaning Air Stripping meaning Air Vent (of a Dam) meaning Alachlor meaning Aldosterone meaning Alfalfa Valve meaning Algae meaning Algal Bloom meaning Algal Growth Potential (AGP) meaning Algal Growth Rate meaning Algicide meaning Algorithm meaning Alkali meaning Alkaline meaning Alkalinity meaning Allochthonous Material meaning Allogenic meaning Allogenic Succession meaning Allopathy meaning Alluvial meaning Alluvial Fan meaning Alluvial Fan Flooding meaning Alluvial Flat meaning Alluvial Land meaning Alluvial Plain meaning Alluvial Valley Floor meaning Alluvion meaning Alluvium meaning Alpenglow meaning Alpine meaning Alpine Decree California and Nevada meaning Alternate Concentration Limits (ACLs) meaning Alternatives meaning Altithermal meaning Altitude meaning Altocumulus Cloud meaning Altostratus Cloud meaning Altum Mare meaning Alum meaning Aluminum Sulfate meaning Ambient Water Quality Standards meaning Amebic Dysentery meaning American Public Works Association (APWA) meaning American Society of Civil Engineers (ASCE) meaning American Water Works Association (AWWA) meaning Amictic Lake meaning Ammonia Stripping meaning Ammonification meaning Ammonium Sulfate meaning Amphibian meaning Amphibiotic meaning Amphibious meaning Ampoules meaning Amprometric Titration meaning Anabaena meaning Anabranch meaning Anadromous meaning Anaerobe meaning Anaerobic meaning Anaerobic Decomposition meaning Anaerobic Digester meaning Anaerobic Digestion meaning Anaho Island National Wildlife Refuge (NWR) Nevada meaning Analog meaning Analytical Model meaning Anastomosing meaning Anathermal meaning Anchor meaning Anchor Ice meaning Ancient Water Course meaning Aneroid meaning Angiosperms (Angiospermea) meaning Angler-Day meaning Anhydride meaning Anhydrous meaning Anion meaning Anisotropy meaning Annual Flood meaning Annual Flood Series meaning Annual Low-Flow meaning Annual Runoff meaning Annual 7-Day Minimum (USGS) meaning Annular Space meaning Annulus meaning Annulus Pressure meaning Anoxia meaning Anoxia, Functional meaning Anoxic meaning Antecedent Moisture meaning Antecedent Moisture Condition (AMC) meaning Antecedent Precipitation meaning Antecedent Precipitation Index (API) meaning Antecedent Soil Water meaning Antecedent Streams meaning Antediluvian (Policy) meaning Anthropogenic meaning Anticyclone meaning Antidegradation Policy (or Clause) meaning Antifreeze meaning Antifluoridationist meaning Anti-Seepage Collar meaning Apex meaning Aphotic meaning Apothecaries’ Measure meaning Applicable or Appropriate Requirements (ARARs) meaning Application Rate meaning Application, Water Right meaning Applied Water Demand meaning Appropriate meaning Appropriated Water meaning Appropriate Technology meaning Appropriation meaning Appropriation Doctrine meaning Appropriative Water Right Nevada meaning Appropriator meaning Approximate Original Contour meaning Appurtenant meaning Appurtenant Land meaning Appurtenant Structures (of a Dam) meaning Appurtenant to Place of Use meaning Appurtenant Water Right meaning Apron meaning Aqua meaning Aquacade meaning Aquaculture, also Aquiculture meaning Aquanaut meaning Aquarium meaning Aquarius meaning Aquatic meaning Aquatic Algae meaning Aquatic Life meaning Aqueduct meaning Aqueous meaning Aqui meaning Aquic meaning Aquiculture meaning Aquifer meaning Aquifer, Basin-Fill meaning Aquifer Compaction meaning Aquifer, Confined meaning Aquifer, Fractured Bedrock meaning Aquifer, Leaky (Semi-Confined) meaning Aquifer, Perched meaning Aquifer, Saline/Poor Quality meaning Aquifer, Sandstone meaning Aquifer System meaning Aquifer Test meaning Aquifer, Unconfined meaning Aquifer, Volcanic Rock meaning Aquifuse meaning Aquitard meaning Arable Land meaning Arboretum meaning Arboriculture meaning Arch Dam meaning Arch-Gravity Structure meaning Archimedean Screw meaning Arctic Tundra meaning Are meaning Area-Capacity Curve meaning Area Flooded meaning Area (Sub-Area), Hydrographic meaning Area of Critical Environmental Concern (ACEC) meaning Area of Critical Environmental Concern (ACEC) Nevada meaning Area of Influence meaning Area of Origins Protection meaning Area of Review meaning Area of Shallow Flooding meaning Area of Special Flood Hazard meaning Area of Special Flood-Related Erosion Hazard meaning Area of Special Mudslide (i.e., Mudflow) Hazard meaning Argillic Alteration (Argillization) meaning Arid meaning Arid Climate meaning Aridic meaning Aridity meaning Arithmetic Growth meaning Arithmetic Mean meaning Arm meaning Arm of the Sea meaning Armor meaning Armoring meaning Arranged Delivery meaning Arrastra meaning Arroyo meaning Arroyo Valley meaning Artesian meaning Artesian Aquifer meaning Artesian Basin meaning Artesian Pressure meaning Artesian Water meaning Artesian Well meaning Artesian Zone meaning Artificial Recharge meaning Artificial Substrate meaning Artificially Developed Water meaning Asbestos meaning Asbestosis meaning Ash Mass meaning Ash Meadows National Wildlife Refuge (NWR) Nevada meaning Aspect meaning Asperse meaning Assessment Report meaning Assignment of Water meaning Assimilation meaning Assimilative Capacity meaning Association of Boards of Certification meaning Asthenosphere meaning Atmometer meaning Atmosphere meaning Atrazine meaning Attached Ground Water meaning Attenuation meaning Atterberg Limits meaning (National) Audubon Society meaning Aureole meaning Autochthonous Material meaning Autoregression, or Autoregressive Process meaning Autotrophic Index meaning Auxiliary Spillway meaning Available Nutrients meaning Available Water meaning Available Water Content (AWC) meaning Available Water Holding Capacity meaning Avalanche meaning Average Annual Flood Damages meaning Average Annual Recharge meaning Average Annual Runoff (Yield) meaning Average Conditions meaning Average Discharge meaning Average Water Year meaning Average Year Water Demand meaning Average Year Water Supply meaning Avoirdupois Weight meaning Avulsion meaning Awash meaning Axial Flow meaning Axis (of a Dam) meaning Azotobacter meaning B–Horizon meaning Babble meaning BAC meaning Backbar Channel meaning Backfill, or Backfilling meaning Backflow meaning Backflow Preventer meaning Back Lands meaning Back Pressure meaning Back Siphonage meaning Back Swamp meaning Backrush meaning Backset meaning Backshore meaning Backslope meaning Backwash meaning Backwashing meaning Backwater meaning Backwater Curve meaning Backwater Effect meaning Backwater Flooding meaning Backwater Pools meaning Bacteria (Singular: Bacterium) meaning Bacterial Plate Count meaning Bactericidal meaning Bacteriostatic meaning Badlands meaning Baffle meaning Bag of Waters meaning Bail meaning Bailer meaning Bajada meaning Balanced Groundwater Scenario (BGS) meaning Ball Cock meaning Ball Valve meaning Ballast meaning Ballena meaning Bank, and Banks meaning Bank and Channel Stabilization meaning Bankfull Channel meaning Bankfull Discharge meaning Bankfull Stage meaning Banking (Water) meaning Bank Storage meaning Baptism meaning Bar meaning Barothermograph meaning Bar Racks meaning Bar Screen meaning Barrage meaning Barrel meaning Bartlett Decree Nevada meaning Basalt meaning Basalt Aquifers meaning Base meaning Base Flood (100-Year Flood) meaning Base Flood (FEMA) meaning Base Flood Elevation (BFE) meaning Base Floodplain meaning Base Flow meaning Base Level meaning Base Period meaning Base Runoff meaning Base Width meaning Baseline meaning Baseline (Data) meaning Basic meaning Basic Hydrologic Data meaning Basin meaning Basin and Range Nevada meaning Basin Fill meaning Basin Floor meaning Basin-Floor Remnant meaning Basin Lag meaning Basin Management (of Water) meaning Basin of Origin meaning Basin Yields meaning Basins Nevada meaning Bath meaning Bathe meaning Batholith meaning Bathing Water meaning Bathometer meaning Bathtub Effect meaning Bathyal Zone meaning Bathymetric Map meaning Bathymetry meaning Bathyscaphe meaning Bathysphere meaning Bathythermograph meaning Baumé meaning Bay meaning Bay-Delta California meaning Bayesian Inference meaning Bayou meaning Beach meaning Beach Erosion meaning Beach Plain meaning Beach, Public meaning Beach Terrace meaning Bead meaning Beaufort’s Scale meaning Bed meaning Bedew meaning Bed Load meaning Bed Load Discharge meaning Bed Material meaning Bedrock meaning Bedscarp (Nick Point) meaning Bed Slope meaning Beheaded Stream meaning Bell meaning Belt of Soil Moisture meaning Bench Flume meaning Bench Land (Soils) meaning Bench Lands Nevada meaning Benchmark meaning Beneficial Use (of Water) meaning Benefit-Cost Ratio meaning Benthic meaning Benthic Invertebrates meaning Benthic Organisms meaning Benthic Region meaning Benthos meaning Bentonite meaning Berg meaning Bernoulli Effect meaning Bernoulli’s Equation meaning Berm meaning Best Available Demonstrated Technology (BADT) meaning Best Available Technology Economically Achievable (BAT) meaning Best Conventional Control Technology (BCT) meaning Best Management Practices (BMP) meaning Best Management Practices (BMP)–Urban Water Use meaning Best Practicable Control Technology (BPT) meaning Bias meaning Bicarbonate meaning Biennial Plant meaning Bifurcate meaning Bilge Water meaning Billabong meaning Billow meaning Bimodal Distribution meaning Bioaccumulants meaning Bioassay meaning Biochemical Oxidation meaning Biochemical Oxygen Demand (BOD) meaning Biocide meaning Bioclimatic Zones meaning Biocoenosis meaning Bioconcentration meaning Bioconcentration Factor (BCF) meaning Bioconcentration Potential (BCP) meaning Bioconversion meaning Biodegradable meaning Biodegradation meaning Biodenitrification meaning Biodisc meaning Biodiversity meaning Biofouling meaning Biogas meaning Biogenic meaning Biogeography meaning Bioindicator meaning Biological Activated Carbon (BAC) Process meaning Biological Additives meaning Biological Community meaning Biological Control meaning Biological Diversity meaning Biological Magnification meaning Biological Opinion meaning Biological Oxidation meaning Biological Oxygen Demand (BOD) meaning Biological Processes meaning Biological Treatment meaning Biological Wastewater Treatment meaning Biomagnification meaning Biomass meaning Biomass Pigment Ratio meaning Biomat meaning Biome meaning Biomonitoring meaning Bioremediation meaning Biosolids meaning Biosphere meaning Biota meaning Biotechnical Slope Protection meaning Biotechnology meaning Biotic meaning Biotic Community meaning Biotic Integrity meaning Biotower meaning Biotransformation meaning Bilvolume meaning Bittern meaning Black Ice meaning Black Smoker meaning Blackwater meaning Blanch meaning Blanket (of a Dam) meaning Blanket Mires meaning Blear meaning Blending meaning Blinds meaning Bloom meaning Blowdown meaning Blowhole meaning Blowout meaning Blue-Green Algae meaning Blue Water meaning BMP meaning BOB meaning BOD meaning BOD5 meaning Body Fluid meaning Body Water Content meaning Bog meaning Bog Hole meaning Boil meaning Boiling Point meaning Boiling Water Reactor (BWR) meaning Boiloff meaning Bolson meaning Bolson Floor meaning Bong meaning Boom meaning Borax meaning Border meaning Border Ditch meaning Border Irrigation meaning Bore meaning Boreal Forest meaning Borehole meaning Botany meaning Bottled Water General meaning Bottled Water Food and Drug Administration (FDA) meaning Bottled Water Nevada meaning Bottom meaning Bottomland, also Bottom Land (Soils) meaning Bottom Land Hardwoods meaning Bottom Lands Nevada meaning Bottom Material meaning Bottom Outlet meaning Boulder meaning Boundary Conditions meaning Boundary Layer meaning Bound Water meaning Bourn, also Bourne meaning B.P. meaning BPI Pan meaning Brackish meaning Brackish Water meaning Braided Stream meaning Braiding (of River Channels) meaning Branch meaning Branch of the Sea meaning Branch Water meaning Brash meaning Brawl meaning Breach meaning Break meaning Breakaway Walls meaning Breaker meaning Breakpoint Chlorination meaning Breakthrough meaning Breakthrough Curve meaning Breakup meaning Brim meaning Brine meaning Brine Disposal meaning Brine Mud meaning Brink meaning British Thermal Unit (BTU) meaning Broad-Leaved Deciduous meaning Broad-Leaved Evergreen meaning Broadcast Spawners meaning Bromide meaning Brook meaning Brownian Movement meaning Browsing meaning Bubble meaning Bubbler meaning Bucket meaning Buddle meaning Buffer meaning Buffer Strips meaning Buffer Zone meaning Bulkhead meaning Bulking Sludge meaning Bund meaning Buoy meaning Buoyancy meaning Buran meaning Burble meaning (United States) Bureau of Indian Affairs (BIA) meaning (United States) Bureau of Land Management (BLM) meaning (United States) Bureau of Reclamation (BOR, and USBR) meaning Buried Drain meaning Burn meaning Bushel meaning Butt meaning Butt End meaning Buttress Dam meaning Bypass, also By-Pass meaning Bypass System meaning Bypassed meaning C–Horizon meaning Cabotage meaning Caisson meaning Calcareous meaning Calcareous Fens meaning Calcic Horizon meaning Calcine meaning Calcite meaning Calcium Carbonate meaning Calcium Chloride meaning Calcium Hydroxide meaning Calf meaning Calgon meaning Caliche meaning California Doctrine meaning California Environmental Quality Act (CEQA) meaning California–Nevada Interstate Compact California and Nevada meaning California Species of Special Concern meaning California State Water Resources Control Board (SWRCB) meaning California Water Commission meaning Call the River meaning Calm meaning Calorie meaning Calve meaning Camel meaning Canal meaning Canal Automation meaning Canal Check Gate Structure meaning Canal Freeboard meaning Canal Losses meaning Canal Pool meaning Canal Prism meaning Canal Reach meaning Canal System Operation meaning Canceled Water Right meaning Candidate Species meaning Canopy meaning Canopy Resistance meaning Canyon, also Cañon meaning Cap meaning Capa (Critical Aquifer Protection Area) meaning Capacitive Deionization (CDI) meaning Capacity, Field or Soil meaning Capacity, Gross Reservoir meaning Cape meaning Capillarity meaning Capillary Action meaning Capillary Attraction meaning Capillary Fringe meaning Capillary Phenomena meaning Capillary Potential meaning Capillary Rise meaning Capillary Water meaning Capillary Zone meaning Capture meaning Capture Zone meaning Carbamates meaning Carbon Adsorption meaning Carbon-Chloroform Extract (CCE) meaning Carbon Filtration meaning Carbon Dioxide meaning Carbon Polishing meaning Carbon Treatment meaning Carbonaceous Biochemical Oxygen Demand meaning Carbonate meaning Carbonate Aquifer meaning Carbonate Buffer System meaning Carbonate Hardness meaning Carbonate Rock meaning Carbonated Water meaning Carbonation, Groundwater meaning Carbonic Acid meaning Carcinogen meaning Carcinogenic meaning Carlson’s Trophic State Index (TSI) meaning Carr, also Car meaning Carriage Losses (Water) meaning Carrying Capacity meaning Carson Division Newlands Project, Nevada meaning Carville Decree Nevada meaning Cascade meaning Cascade Flow meaning Casing meaning Casual Water meaning Catabolism meaning Catadromous meaning Catalase meaning Catalysis meaning Catalyst meaning Catalytic Converter meaning Catalyze meaning Cataphoresis meaning Catastrophic meaning Catch Basin meaning Catchment meaning Catchment Area meaning Catchment Area (Basin) meaning Categorical Exclusion meaning Categorical Pretreatment Standard meaning Cation meaning Cation Exchange meaning Cation Exchange Capacity (CEC) meaning Cat’s-Paw, also Catspaw meaning Caustic meaning Cavendish, Henry (1731–1810) meaning Cavern meaning Caving meaning Cavitation meaning Cell meaning Cells/Volume meaning Cells Volume (Biovolume) meaning Cellulose meaning Celsius Temperature Scale (C) meaning Cenozoic Era meaning Census meaning Census of Agriculture meaning Census X–11 (Seasonal Adjustment) Process meaning Center-Pivot Irrigation meaning Centigrade Temperature Scale (C) meaning Central Valley Project (CVP) California meaning Centralized Control (Canal) meaning Centralized Headquarters (Canal) meaning Centrifugal Pump meaning Centrifugation meaning CEQA meaning CERCLA meaning Certificate of Water Right meaning Certificated Water Right meaning Certificated Water Right Nevada meaning Certified Water Right meaning Cesspool meaning CFS (Cubic Foot per Second) meaning CFS-Day meaning CFSM (Cubic Feet per Second per Square Mile) meaning Chalk meaning Chalybeate meaning Channel meaning Channel Bank meaning Channel Capacity meaning Channel Control meaning Channel Density meaning Channel-Forming Discharge meaning Channel Inflow meaning Channel Lining meaning Channel Modification meaning Channel Realignment meaning Channel Stabilization meaning Channel Storage meaning Channelization meaning Chaparral meaning Chatter Mark, also Chattermark meaning Check Dam meaning Check Gate meaning Check Irrigation meaning Check Structure meaning Check Valve meaning Chemical Feeder meaning Chemical Oxygen Demand (COD) meaning Chemical Weathering meaning Chemigation meaning Chemoautotroph meaning Chemocline meaning Chemodynamics meaning Chemosphere meaning Chemosynthesis meaning Chimney meaning Chinook meaning Chloramines meaning Chlorides meaning Chlorinated meaning Chlorinated Hydrocarbons meaning Chlorination meaning Chlorinator meaning Chlorine meaning Chlorine Breakpoint meaning Chlorine-Contact Chamber meaning Chlorine Demand meaning Chlorine Residual meaning Cholera meaning Chop meaning Chott, also Shott meaning Chresard meaning Chronic meaning Chuckhole meaning Chute, or Chute Cutoff meaning Chute Spillway meaning Cienega meaning Circulate, or Circulation meaning Circumneutral meaning Cirque meaning Cirque Basin meaning Cirrocumulus Clouds meaning Cirrostratus Clouds meaning Cirrus Clouds meaning Cistern meaning Clam-Flat meaning Clammy meaning Clarification meaning Clarifier meaning Class A Pan meaning (Injection Well) Classes meaning Classical Inference meaning Classical Linear Regression (CLR) Model meaning Classification (Soils) meaning Clast (Clastic) meaning Clay meaning Clay Liner meaning Claypan meaning Clayseal meaning Clay Soil meaning Clean (Water) meaning Clean Water Act (CWA) Public Law 92–500 meaning Clean Water Act (CWA), Section 319 meaning Clean Water Standards (EPA) meaning Clear Well meaning Clepsydra meaning Climate meaning Climatic Cycle meaning Climatic Year meaning Climatology, also Climatological meaning Climax meaning Clod meaning Closed Basin meaning Closed-Basin Lake meaning Closed Canopy meaning Closed Conduit System meaning Closed-Cycle Cooling meaning Closed Drain meaning Closed-Loop Recycling meaning Closed Water Loop meaning Closet meaning Cloud meaning Cloudburst meaning Cloud Chamber meaning Cloud Modification meaning Cloud Seeding meaning Coagulant meaning Coagulant Aid meaning Coagulate meaning Coagulation meaning Coal Slurry Pipeline meaning Coastal Barrier meaning Coastal Barrier Resources System (CBRS) meaning Coastal High Hazard Area meaning Coastal Zone meaning Coastal Zone Management Act (CZMA) meaning Cobble meaning COD meaning Code of Federal Regulations (CFR) meaning Co-Dominant meaning Coefficient Term meaning Coefficient of Determination (R2) meaning Coefficient of Discharge meaning Coefficient of Linear Extensibility meaning Coefficient of Mechanical Diffusion meaning Coefficient of Molecular Diffusion meaning Coefficient of Roughness meaning Coefficient of Runoff meaning Coefficient of Storage meaning Coefficient of Transmissivity (t) meaning Coefficient of Variation, or Variability meaning Coefficient of Viscosity meaning Cofferdam meaning Cogeneration meaning Cohesion meaning Cold Front meaning Cold Vapor meaning Cold-Water meaning Coldwater Fish meaning Coliform (Bacteria) meaning Coliform Index meaning Collection Site meaning Collector Sewers meaning Collector System meaning Collector Well meaning Colloidal Suspension meaning Colloids meaning Colluvial Hollow meaning Colluvial Material meaning Colluvium meaning Colon Bacillus meaning Colonization meaning Color (Water) meaning Colorado River Commission Nevada meaning Colorado River Compact meaning Colvin Algorithm meaning Combined Available Chlorine meaning Combined Residual Chlorination meaning Combined Sewer Overflow (CSO) meaning Combined Sewer System (CSS) meaning Comet meaning Commercial Water Use (Withdrawals) meaning Common Law meaning Community meaning Community Assistance Program (CAP) meaning Community of Interest meaning Community of Place meaning Community Water System meaning Compact, Water meaning Compaction meaning Compensation Level meaning Compensation Point meaning Complete Fertilizer meaning Complete Treatment meaning Completed Test meaning Completion meaning Compliance Cycle meaning Compliance Monitoring meaning Compliance Schedule meaning Comply (EPA) meaning Component Landforms meaning Composite Sample meaning Compost meaning Compound meaning Comprehensive Plan meaning Concentrate meaning Concentration meaning Concentration Time meaning Concordant Flows meaning Concrete-Gravity Structure meaning Condemnation meaning Condensate meaning Condensation meaning Condense meaning Conditional Water Permit meaning Conductance meaning Conductivity meaning Conductor Casing meaning Conduit meaning Cone of Depression (COD)/Cone of Influence (COI) meaning Confidence Limits meaning Confined Aquifer meaning Confined Ground Water meaning Confined Water (Artesian) meaning Confining Bed meaning Confining Unit meaning Confirmed Test meaning Confluence meaning Confluent Growth meaning Confounding Variable meaning Conifer meaning Coniferous meaning Conjunctive Management meaning Conjunctive Operation meaning Conjunctive (Water) Use meaning Connate Water meaning Connector System meaning Consent Decree meaning Consequent Stream meaning Conservation meaning Conservation District meaning Conservation Easement meaning Conservation Education meaning Conservation Plan meaning Conservation Pool meaning Conservation Practice meaning Conservation Standards meaning Conservation Storage meaning Conservation Tillage meaning Consolidated Aquifer meaning Consolidation meaning Consolidation Grouting (of a Dam) meaning Consolute meaning Constant Head Orifice Turnout (Canal) meaning Constant Volume Operation Method (Canal) meaning Constituents meaning Constructed Wetlands meaning Construction Joint (of a Dam) meaning Consumable Water Supply meaning Consumption, Domestic meaning Consumption, Industrial meaning Consumption, Municipal meaning Consumptive Irrigation Requirement (CIR) meaning Consumptive (Water) Use meaning Consumptive Water Use, Irrigation meaning Consumptive Water Use, Net meaning Consumptive Water Use Requirement (Crop) meaning Consumptive Water Waste meaning Contact Recreation (Water) meaning Contact Stabilization meaning Contaminant meaning Contaminate meaning Contamination (Water) meaning Contents (Storage) meaning Continental Divide meaning Continental Divide United States meaning Continental Drift meaning Continental Shelf meaning Continuity Equation meaning Continuous Delivery meaning Continuous Discharge meaning Continuous-Record Station (USGS) meaning Continuous Recorder (Gage) meaning Continuous Sample meaning Contour Ditch meaning Contour Flooding meaning Contour-Furrow Irrigation meaning Contour Furrows meaning Contour Plowing meaning Contour Strip Farming meaning Contour Trenching meaning Contract (USBR) meaning Contract Rate (USBR) meaning Contrail meaning Contributing Area meaning Control Dam meaning Control Points (Horizontal and Vertical) meaning Control Scheme (Canal) meaning Control Structure (USGS) meaning Control System (Canal) meaning Controlled Drainage meaning Controlled Volume Operation Method (Canal) meaning Convection meaning Convectional Storm meaning Convective Clouds meaning Convective Precipitation meaning Convective Transport meaning Conventional Activated Sludge meaning Conventional Method (Canal) meaning Conventional Systems meaning Conventional Tilling meaning Conventional Water meaning Conveyance Loss meaning Coolant meaning Cooling Pond meaning Cooling Tower meaning Cooling Water meaning Cooling Water Consumption (Power) meaning Cooling Water Load meaning Cooling Water Required (Power) meaning Coordinated Resource Management and Planning meaning Coordinated Resource Plan meaning Core meaning Core Wall (of a Dam) meaning Coriolis Effect meaning Corn Snow meaning Corona meaning Corps of Engineers (COE) meaning Corrasion meaning Correlation meaning Correlation Coefficient (R) meaning Correlative meaning Correlative Estimate meaning Correlative (Water) Rights meaning Corrosive meaning Corrugation Irrigation meaning Coulee meaning Couloir meaning Coupon meaning Coupon Test meaning Course (Water) meaning Covariance meaning Cove meaning Cover meaning Cover Crop meaning Cradle meaning Cranberry Bog meaning Creek meaning Creep meaning Creeper meaning Crenulation meaning Creosotes meaning Crest meaning Crest Gate meaning Crest Length meaning Crest Stage meaning Crest Width (or Top Thickness) meaning Crevasse meaning Crib Dam meaning Crick meaning Criteria meaning Criteria, Testing (R2, t–Statistic, and F–Statistic) meaning Criteria, WHPA meaning Critical meaning Critical Aquifer Protection Area (CAPA) meaning Critical Area meaning Critical (Ground Water) Area meaning Critical Depth meaning Critical Dry Period meaning Critical Dry Year meaning Critical Flow meaning Critical Habitat meaning Critical Low-Flow meaning Critical Point meaning Critical Reach meaning Critical Slope meaning Critical Velocity meaning Crop Coefficient meaning Crop Consumptive Use (Crop Requirement) meaning Crop Irrigation Requirement meaning Crop Moisture Index (CMI) (Drought Index) meaning Crop Requirement meaning Crop Rotation meaning Crop Subsidy meaning Cropland meaning Cross Connection meaning Cross Section meaning Cross-Sectional Analysis meaning Crown Cover meaning Crud meaning Cryology meaning Cryoscope meaning Cryptosporidial (Crypto) Oocyst meaning Cryptosporidiosis meaning Cryptosporidium Parvum meaning CSO meaning Cubic Feet Per Second (CFS) meaning Cubic Feet Per Second Day (CFS-Day) meaning Cucking Stool meaning Cultivate meaning Cultural Eutrophication meaning Cultural Landscape meaning Culvert meaning Cumulative Impact meaning Cumulative Infiltration meaning Cumulonimbus Clouds meaning Cumulus Clouds meaning Cunette meaning Curb Stop meaning Curl meaning Current meaning Current Meter meaning Cutback Irrigation meaning Cut Bank meaning Cutoff, also Cut Off meaning Cutoff Trench (of a Dam) meaning Cutoff Wall (of a Dam) meaning Cutwater meaning Cyanazine meaning Cycle meaning Cycle of Erosion meaning Cyclone meaning Cyclonic Precipitation meaning Cyclonic Storm meaning Cypress Knees meaning Cypress Swamp meaning Dabble meaning Daily Flood Peak meaning Daily Record meaning Daily Record Station meaning Daily Temperature Range meaning Dalton meaning Dam meaning Damage-Frequency Curve meaning Damages Prevented meaning Damp meaning Dap meaning Darcy’s Law meaning Data meaning Data Bank meaning Data, Cross-Sectional meaning Data Management meaning Data, Primary meaning Data, Secondary meaning Data, Time-series meaning Datum meaning Daylight meaning DDT (Dichlorodiphenyltrichloroethane) meaning Dead End meaning Deadman meaning Dead Storage meaning Dead Time meaning Dead Zone Gulf of Mexico meaning Debacle meaning Debris meaning Debris Basins meaning Debris Dam meaning Debris Flow meaning Debris Guard meaning Decant meaning Decay meaning Dechlorinate meaning Dechlorination meaning Deciduous (Plant) meaning Deciduous Stand meaning Deciles (Drought Index) meaning Declared Underground Water Basin meaning Decomposer meaning Decomposition meaning Decorative Water Feature meaning Decree meaning Decree 731 (Interim Walker River Decree) Nevada meaning Decree C–125 (Final Walker River Decree) Nevada meaning Decreed Rights (Water) meaning Dedicated Natural Flow meaning Dedications (Water) meaning Deep Carbonate Aquifer Nevada meaning Deep-Draft Harbor meaning Deep-Lava Theory meaning Deep Percolation (Loss) meaning Deep Seepage (Losses) meaning Deep-Water meaning Deepwater Habitats meaning Deep Well meaning Deep-Well Disposal meaning Deep-Well Injection meaning Deflocculate meaning Deflocculating Agent meaning Defluoridation meaning Defog meaning Defrost meaning Degasification meaning Degradation (River Beds or Stream Channels) meaning Degrade meaning Degree Day meaning Degree of Protection meaning Dehumidify meaning Dehydratase meaning Dehydrate meaning Dehydration meaning Dehydrator meaning Deice meaning Deicer meaning Deionization meaning Deionize meaning Deionized Water meaning Delay Time meaning Delegated State meaning Delineation meaning Deliquesce meaning Deliquescence meaning Delivery (Irrigation) meaning Delivery Box meaning Delivery Concept meaning Delivery Flexibility meaning Delivery/Release meaning Delivery System meaning Delta meaning Deluge meaning Demand (Water) meaning Demand Delivery meaning Demand Management Alternatives meaning Demersal meaning Demineralization, also Demineralize meaning Demineralized Water meaning De Minimis meaning Demographics meaning Demography meaning Dendrochronology meaning Denitrification meaning Denitrifying Bacteria meaning Denizen meaning Density meaning Density Current meaning Density Stratification meaning Deoxygenate meaning Department of Conservation And Natural Resources Nevada meaning (United States) Department of the Interior (USDI) meaning Department of Water Resources (DWR) California meaning Depauperate meaning Dependable Supply meaning Dependable Yield meaning Depletion meaning Depletion (Ground Water) meaning Depletion (Streamflow) meaning Depletion (Water) meaning Depletion Curve meaning Deposit meaning Depositing Substrates meaning Deposition meaning Depression Storage meaning Depth, often Depths meaning Depth-Area-Duration Analysis meaning Depth Finder meaning Depth of Runoff meaning Depth Sounder meaning Depuration meaning Derelict meaning Dereliction meaning Desalination, or Desalinization meaning Desalinize meaning Desalting meaning De-Seasonalization meaning Desert meaning Desert Pavement meaning Desert Stream Valley meaning Desert Varnish meaning Desertification meaning Desert Research Institute (DRI) Nevada meaning Desert National Wildlife Refuge (NWR) Nevada meaning Desiccant meaning Desiccate meaning Desiccation meaning Desiccation Cracks meaning Design Capacity meaning Design Flood meaning Design Flow meaning Design Runoff Rate meaning Designated Floodway meaning Designated Groundwater Basin meaning Designated Groundwater Basin Nevada meaning Designated Uses meaning Designated Watersheds meaning Designer Bugs meaning Desilting Area meaning Desorption meaning Destratification meaning Detachment meaning Detectable Leak Rate meaning Detection Criterion meaning Detection Monitoring Program meaning Detention Dam meaning Detention Basin meaning Detention Facility meaning Detention Storage meaning Detention Structure (Dam) meaning Detention Time meaning Detergent meaning Deterministic Process meaning Detrital meaning Detritus meaning Deuterium Oxide meaning Developed Water meaning Deviation, Standard meaning Dew meaning Dew Point meaning Dewater, and Dewatering meaning Diadromous meaning Diameter at Breast Height (DBH) meaning Diastrophic meaning Diatom meaning Diatoma meaning Diatomaceous Earth meaning Diatomite meaning Diel meaning Diffluence meaning Diffused Air meaning Diffusion meaning Diffusion Coefficient meaning Diffusivity, Soil Water meaning Digester meaning Digester Gas meaning Digestion meaning Dike meaning Diligence meaning Diluent meaning Dilute meaning Dilution meaning Dilution Factor meaning Dilution Ratio meaning Diluvial, also Diluvian meaning Dimictic Lake (or Reservoir) meaning Dioxin meaning Dip meaning Dipper meaning Diquat meaning Direct Discharger meaning Direct Filtration meaning Direct Precipitation meaning Direct Runoff meaning Direct Water Uses meaning Disaster Area meaning Discharge meaning Discharge (Hydrologic) meaning Discharge Area meaning Discharge, Average meaning Discharge Coefficient meaning Discharge Curve meaning Discharge Formula meaning Discharge Measurement meaning Discharge Period meaning Discharge Permit meaning Discharge Point meaning Discharge Probability Relationship meaning Discharge, Sediment meaning Discharge Velocity meaning Discount Rate meaning Disembogue meaning Disinfectant meaning Disinfectant and Disinfection By-Product Rule (D/DBP) meaning Disinfectant By-Product meaning Disinfectant Time meaning Disinfection By-Products meaning Dispersant meaning Dispersion meaning Dispersion Coefficient meaning Dispersivity meaning Displacement meaning Displacement Ton meaning Disposal meaning Disposal Field meaning Disposal Pond meaning Disposal System meaning Disposal Well meaning Dissection meaning Dissoluble meaning Dissolve meaning Dissolved meaning Dissolved Inorganic Nitrogen meaning Dissolved Load meaning Dissolved Organic Carbon (DOC) meaning Dissolved Organic Compounds meaning Dissolved Oxygen (DO) meaning Dissolved Solids meaning Dissolved-Solids Concentration meaning Distillate meaning Distillation meaning Distilled Water (DW) meaning Distributary meaning Distributary Channel (or Stream) meaning Distribution (of Water) meaning Distribution Coefficient meaning Distribution Graph (Distribution Hydrograph) meaning Distribution System meaning District (USBR) meaning Disturbance meaning Disturbed Area meaning Ditch meaning Ditch Rider meaning Dive meaning Divergence meaning Divergent Plate Boundary meaning Diversion meaning Diversion Channel meaning Diversion Dam (and Dike) meaning Diversion Entitlements meaning Diversion Rate meaning Diversity Index meaning Divertible Water Supply meaning Divide meaning Divining Rod meaning Division Box meaning (State) Division of Health Nevada meaning DO meaning DOC meaning Dock meaning Docking (of Water Rights) meaning Dockyard meaning Doctrine meaning Doctrine of Reliction Nevada meaning Doldrums meaning Dollop meaning Dolos meaning Domestic Consumption meaning Domestic Sewage meaning Domestic Wastewater Facility meaning Domestic Water meaning Domestic Water Use (Withdrawals) meaning Domestic Well meaning Dominant Discharge meaning Dormancy meaning Dormant meaning Double Cropping meaning Douche meaning Douse, also Dowse meaning Downfall meaning Downgradient meaning Downgradient Well meaning Downpour meaning Downstream meaning Downstream Control meaning Downstream Slope (of a Dam) meaning Dowser meaning Draft meaning Drag meaning Drain meaning Drainage meaning Drainage Area (of a Stream at a Specified Location) meaning Drainage Basin meaning Drainage Class, Soils meaning Drainage Coefficient meaning Drainage Density meaning Drainage District meaning Drainage Divide meaning Drainage Field Ditch meaning Drainage Flooding meaning Drainage Lateral meaning Drainage Layer (or Blanket) meaning Drainage Main meaning Drainage Water meaning Drainage Well meaning Drain Field meaning Drainpipe meaning Drains (of a Dam) meaning Drainwater meaning Draw meaning Drawdown meaning Dredge meaning Dredging meaning Dreg meaning Drench meaning DRI Nevada meaning Drift meaning Driftage meaning Drift Organisms meaning Driller’s Well Log meaning Drilling Mud meaning Drink meaning Drinkable meaning Drinking Water meaning Drinking Water Equivalent Level meaning Drinking Water Standards meaning Drinking Water Standards Nevada meaning Drinking Water Supply meaning Drip meaning Drip Irrigation meaning Drip (Trickle) Soil Absorption System meaning Drizzle meaning Drop meaning Drop-Inlet Spillway meaning Drop Spillway meaning Droplet meaning Dropper meaning Drops meaning Drop Spillway meaning Drop Structure meaning Drought meaning Drought Condition meaning Drought Indexes (Indices) meaning Drought Period meaning Drought Reserve Water meaning Drought Year Supply meaning Drown meaning Drumlin meaning Dry meaning Dry Adiabatic Lapse Rate meaning Dry Dam meaning Dry Deposition meaning Dry Dock meaning Dry Farming meaning Dry Floodproofing meaning Dry Hydrants meaning Dry Ice meaning Dry Mass meaning Dry Proofing meaning Dry Wash meaning Dry Weight meaning Dry Well meaning Drying Off meaning Dryland Farming meaning Dual-Distribution Piping meaning Dual Media Filtration meaning Ducking Stool meaning Duckweed meaning Duct meaning Duff meaning Dune meaning Dune Pond (Lake) meaning Dune Swale meaning Dunk meaning Duplicates meaning Duralumin meaning Duration Curve meaning Duripan meaning Duty (of Water) meaning Dusting meaning Dynamic Equilibrium meaning Dynamic Head meaning Dysentery meaning Dystrophic meaning Dystrophic Lake meaning E. Coli (Escherichia Coli) meaning Eagre meaning Early Seral Condition meaning Earthfill Dam meaning Easement meaning Ebb meaning Ebb Tide meaning Echard meaning Echo Sounder meaning Ecohydraulics meaning Ecological Approach meaning Ecological Assessment meaning Ecological Impact meaning Ecological Indicator meaning Ecological Risk Assessment meaning Ecological Succession meaning Ecology meaning Econometric Model Building meaning Econometrics meaning Ecoregion meaning Ecosphere meaning Ecosystem meaning Ecosystem Functions meaning Ecosystem Management meaning Ecosystem Restoration meaning Ecosystem Structure meaning Ecosystem Sustainability meaning Ecotone meaning Ecotype meaning Edaphic meaning Eddy meaning Eddy Current meaning Edema, also Oedema meaning Edwards Decree Nevada meaning Effective Porosity meaning Effective Precipitation (or Rainfall) meaning Efficiency (Irrigation) meaning Efficient Water Management Practices (EWMP) meaning Effloresce meaning Efflorescence meaning Effluent meaning Effluent Guidelines meaning Effluent Limitation meaning Effluent Seepage meaning Effluent Standard meaning Effluent Streams meaning Ejector meaning Ekman Dredge meaning Electric Power Water (Public Utility) meaning Electrical Conductivity meaning Electrical Log meaning Electrodialysis meaning Electrodialysis Reversal (EDR) meaning Electrolysis meaning Electrophoresis meaning Element meaning Elevated Ditch meaning Elevation meaning Elevation Datum Plane meaning Elevation Head meaning Eligible Costs meaning Eligible Land meaning Elimination meaning El Niño meaning El Niño/Southern Oscillation (ENSO) meaning Elutriate meaning Elutriation meaning Eluviation meaning Embankment meaning Embankment Dam meaning Emergency Action Plan (Dam) meaning Emergency Program (FEMA) meaning Emergency Spillway meaning Emergent meaning Emergent Hydrophytes meaning Emergent Mosses meaning Emergent Plant meaning Emergent Wetland meaning Emersed meaning Eminent Domain meaning Empedocles meaning Empirical meaning Emulsion meaning Encroachment meaning Endamoeba Histolytica meaning Endangered Species meaning Endangered Species Act (ESA) meaning Endangered Species Conservation Act meaning Endangered Species Preservation Act meaning Endangerment Assessment meaning Endemic meaning Endogenous meaning Endogenous Variable meaning Endoreic meaning Endosmosis, also Endosmotic meaning Endrin meaning Energy meaning Energy Dissipator meaning Energy Gradient meaning (National) Energy Policy Act (EPAct) meaning Enforceable Requirements meaning Enforce (Water Right) meaning Englacial meaning Enhanced Oil Recovery meaning Enhanced Surface Water Treatment Rule (ESWTR) meaning Enhancement meaning Enjoin meaning Enlibra (Initiative) meaning Enrichment meaning Ensaline (Euhaline) meaning Enteric Fever meaning Enteric Viruses meaning Enterococcus Bacteria meaning Entitlement meaning Entrain meaning Entrainment meaning Entrance Head meaning Entrapment Zone meaning Environment meaning Environmental Analysis meaning Environmental Assessment (EA) meaning Environmental Audit meaning Environmental Defense Fund (EDF) meaning Environmental Evaluation meaning Environmental Impact Statement (EIS) meaning Environmental Indicator meaning Environmentalism meaning Environmental Manipulation meaning Environmental Water meaning Enzyme meaning Eolian meaning Eolian Soil Material meaning EPA meaning Ephemeral (Stream) meaning Epidemiology meaning Epilimnion meaning Epithermal meaning Equal Discharge Increment (EDI) meaning Equal Footing Doctrine (U.S. Constitution) meaning Equal Transit Rate (ETR) meaning Equilibrium Condition meaning Equilibrium Constant meaning Equilibrium Drawdown meaning Equilibrium Surface Discharge meaning Equilibrium Time meaning Equinoctial meaning Equipotential Line meaning Equipotential Surface meaning Erodible meaning Erosion meaning Erosion Ballon meaning Erosion, Bank meaning Erosion, Beach meaning Erosion Control meaning Erosion, Gross meaning Erosion, Gully meaning Erosion Hazard meaning Erosion Potential meaning Erosion, Rill meaning Erosion, Sheet meaning Erosion Control meaning Erosion Flood Plain meaning Erosive meaning ESA (Endangered Species Act) meaning Escarpment meaning Escherichia Coli (E. Coli) meaning Esker meaning Established meaning Estuarine meaning Estuarine Zone meaning Estuary meaning Euphotic meaning Euphotic Zone meaning Eurybathic meaning Euryhaline meaning Eurythermic meaning Eutrophic (Water) meaning Eutrophication meaning Eutrophic Lakes meaning Eutrophic Zone meaning Evaporation meaning Evaporation, Land meaning Evaporation, Net Reservoir meaning Evaporation Opportunity (Relative Evaporation) meaning Evaporation Pan meaning Evaporation Ponds meaning Evaporation Rate meaning Evaporation, Total meaning Evaporative Cooling meaning Evaporativity (Potential Rate of Evaporation) meaning Evaporites meaning Evapotranspiration (ET) meaning Evapotranspiration, Actual meaning Evapotranspiration of Applied Water (ETAW) meaning Evapotranspiration, Potential meaning Evapotranspirometer meaning Everglade meaning Everglades Florida meaning Evergreen (Plant) meaning Evergreen Stand meaning EWMP meaning Exceedence meaning Exceedence Interval meaning Excessive Precipitation meaning Excess Land (USBR) meaning Excess Rainfall meaning Exempt Land (USBR) meaning Exempted Aquifer meaning Exempted meaning Exhaust Trail meaning Existing Construction (FEMA) meaning Exogenous meaning Exogenous Variable meaning Exosmosis, also Exosmotic meaning Exotic meaning Exotic Species meaning Exploratory Holes meaning Exponential Decay meaning Exponential Growth meaning Exposure meaning Exposure Assessment meaning Exposure Indicator meaning Extended Aeration meaning Externality meaning External Cost meaning Extinction meaning Extinction Depth meaning Extirpated Species meaning Extirpation meaning Extractable Organics meaning Extrapolate/Extrapolation meaning Extreme High Water of Spring Tides meaning Extreme Low Water of Spring Tides meaning Extreme Value Series meaning Extrusive Bedrock meaning Exude meaning Face (of a Dam) meaning Facilities Plans meaning Facultative Bacteria meaning Facultative Phreatophyte meaning Fahrenheit Temperature Scale meaning Failure meaning Fairfield-Hardy Digester meaning Fallon National Wildlife Refuge (NWR) Nevada meaning Fall Overturn meaning Falling Limb meaning Fallow meaning Falls meaning Fan meaning Fan Apron meaning Fan Collar meaning Fan-Head Trench meaning Fan Piedmont meaning Fan Remnant meaning Fan-Remnant Sideslope meaning Fan Skirt meaning Fanglomerate meaning Fanlette meaning Farm Delivery Requirement meaning Farm Efficiency meaning Farm Headgate Delivery (Diversion) meaning Farm Pond meaning Farm Waste and Deep Percolation meaning Farmland, Prime meaning Fata Morgana meaning Fathom meaning Faucet meaning Fault meaning Fault Creep meaning Fault Escarpment meaning Fault-Line Scarp meaning Fault, Rupture meaning Fault Sag Ponds meaning Fault Scarp meaning Fault Trace meaning Fauna meaning Feasibility Study (FS) meaning Fecal Bacteria meaning Fecal Material meaning Fecal Streptococcal Bacteria meaning Fecal Streptococcus meaning Federal Emergency Management Agency (FEMA) meaning Federal Insurance Administration (FIA) meaning Federal Reserved Water Rights meaning Federal Water Pollution Control Act (Public Law 92–500) meaning Feedlot meaning Feedwater meaning Feet Per Second (ft./sec.) meaning FEMA meaning Fen meaning Fermentation, Anaerobic meaning Ferrous Sulfate meaning Fertigation meaning Fertilizer meaning Fetch meaning Field meaning Field (Moisture) Capacity meaning Field Diversion meaning Field-Moisture Capacity meaning Field-Moisture Deficiency meaning Field Permeability meaning Field Sprinkler System meaning Filamentous Algae meaning Fill meaning Fill Material meaning Filling meaning Filter meaning Filter Bed meaning Filter Cake meaning Filter Fabric meaning Filter Feeder meaning Filter Strip meaning Filter Zone (of a Dam) meaning Filterable meaning Filtrate meaning Filtration meaning Final Clarifier meaning Finding of No Significant Impact (FONSI) meaning Firm Capacity meaning FIRM Map meaning Firm Yield meaning Firn (Firn Snow) meaning Firn Line meaning First Draw meaning First in Time, First in Right meaning Firth meaning Fish and Wildlife Service (USFWS) meaning Fish Credit Water meaning Fishing Waters meaning Fish Ladder meaning Fishpond meaning Fish Screen meaning Fishway meaning Fissure meaning Five-Hundred Year Flood (500-Year Flood) meaning Fix a Sample meaning Fixed Ground Water meaning Fjord, or Fiord meaning Flap Valve meaning Flash meaning Flashboard meaning Flat meaning Flatboat meaning Flat-Water meaning Float meaning Floater meaning Floating Dock meaning Floating Plant meaning Floating-Leaved Plant meaning Floc meaning Flocculate meaning Flocculation meaning Floe meaning Floe Ice meaning (The) Flood meaning Flood, or Flood Waters meaning Flood (FEMA) meaning Flood, 100-Year meaning Flood, Annual meaning Flood Abatement meaning Flood-Base Discharge meaning Flood Boundary and Floodway Map (FBFM) meaning Flood Capacity meaning Flood Control (Storage) meaning Flood Control Districts meaning Flood Control Pool meaning Flood Crest meaning Flood Damage meaning Flood Depth meaning Flood Duration meaning Flood Duration Curve meaning Flood Elevation meaning Flood Fighting meaning Flood Forecasting meaning Flood Frequency meaning Flood Frequency Curve meaning Flood Fringe meaning Floodgate meaning Flood Hazard Boundary Map (FHBM) meaning Flood Hazard Zones (Defined) meaning Flooding meaning Flooding Problem meaning Flood Insurance meaning Flood Insurance Rate Map (FIRM) meaning Flood Insurance Rate Zone meaning Flood Insurance Study (FIS) meaning Flood, Intermediate Regional meaning Flood Irrigation meaning Flood, Maximum Probable meaning Flood Mitigation Assistance Program (FMA) meaning Flood of Record meaning Flood Peak meaning Flood Plain, also Floodplain meaning Floodplain Fringe meaning Floodplain Information Reports meaning Floodplain Management meaning Floodplain Management Measures meaning Floodplain Management Regulations meaning Floodplain of Aggradation meaning Floodplain Playa meaning Floodplain Regulations meaning Flood Plane meaning Flood Prevention meaning Flood Probability meaning Flood Profile meaning Flood Proofing (Floodproofing) meaning Flood Protection Elevation (FPE) meaning Flood-Related Erosion meaning Flood-Related Erosion Area meaning Flood-Related Erosion Area Management meaning Flood Routing meaning Flood Stage meaning Flood Stage Profile meaning Flood, Standard Project (SPF) meaning Flood Tide, also Floodtide meaning Floodwall meaning Flood Warning meaning Floodwater meaning Floodwater Detention Capacity meaning Floodwater Retarding Structure meaning Floodwater Retention meaning Flood Wave meaning Floodway meaning Floodway Encroachment Lines meaning Floodway Fringe meaning Floodway Hazard Boundary Map meaning Flood Zone meaning Floor meaning Flora meaning Floriston Rates California and Nevada meaning Flotage meaning Flotation, also Floatation meaning Flow meaning Flowage meaning Flow Augmentation meaning Flow Boundaries meaning Flow Duration Curve meaning Flow Duration Percentiles meaning Flow Interval meaning Flowline (Streamline) meaning Flow Meter meaning (Ground Water) Flow Model meaning Flow, Laminar meaning Flow, Modified meaning Flow, Natural meaning Flow, Net meaning Flow, Overland meaning Flow Path meaning Flow Resources versus Stock Resources meaning Flow, Steady meaning Flowstone meaning Flow, Turbulent meaning Flow, Uniform meaning Flow Velocity meaning Flow, Virgin meaning Flowing Well meaning Flowmeter meaning Flue Gas Scrubber meaning Fluid meaning Fluidized meaning Fluid Ounce meaning Fluid Potential meaning Flume meaning Fluoridate (Fluoridation) meaning Fluoride meaning Fluorine meaning Fluorosis meaning Flush meaning Flushing Flows meaning Flushing of Fish meaning Flushless Toilet meaning Flushometer meaning Fluve meaning Fluvial meaning Fluvial Geomorphology (Geomorphologist) meaning Fluvioglacial meaning Flux meaning Flux Density meaning Foam meaning Fog meaning Fog Drip meaning Fold meaning Food Chain meaning Footslope meaning Forage meaning Forage Fish meaning Forb meaning Force Mains meaning Force Pump meaning Ford meaning Forebay meaning Forebay Reservoir meaning Forecast (Forecasting) meaning Forecast Horizon meaning Foreshore meaning Forest meaning Forest Health meaning Forest Hydrology meaning Forest Influences meaning Forest Land meaning (United States) Forest Service (USFS) meaning Forfeited Water Right meaning Forfeiture (Water Right) meaning Formation meaning Fossil Water meaning Foucault, Jean Bernard Léon (1819–1868) meaning Foundation (of a Dam) meaning Founder meaning Fountain meaning Fountainhead meaning Fracture meaning Fractured Bedrock Aquifer meaning Fragile Area meaning Fragmentation (of Habitat) meaning Frazil (Frazil Ice) meaning Freeboard meaning Free Flow meaning Free-Flowing meaning Free-Flowing Stream meaning Free-Flowing Weir meaning Free-Flowing Well meaning Free Ground Water meaning Free Liquids meaning Free Moisture meaning Free Water Surface (FWS) Constructed Wetland meaning Freeze meaning Freezing meaning Freezing Point meaning Freezing Rain meaning French Drain meaning Frequency Analysis meaning Frequency Curve meaning Frequency Distribution meaning Fresh meaning Freshet meaning Fresh-Salt Water Interface meaning Freshwater (Fresh Water) meaning Freshwater Marsh meaning Freshwater Swamps meaning Fret meaning Friable meaning Friction Head meaning Friction Losses meaning Friction Slope meaning Friends of the Earth (FOE) meaning Fringe Water meaning Fringe Marsh meaning Front meaning Frontage meaning Frost meaning Frost Heave meaning Frost Line meaning Frost Pockets meaning Froth meaning Frozen meaning Fuels meaning Full Cost (USBR) meaning Full-Cost Rate (USBR) meaning Fully Permanent Sprinkler System meaning Fumarole meaning Functional Equivalent meaning Functional Relationship meaning Functionally Dependent Use meaning Fungi (Singular: Fungus) meaning Fungicide meaning Furrow meaning Furrow Dams meaning Furrow Irrigation meaning Furrow Stream meaning Gabion meaning GAC (Granular Activated Carbon) meaning Gage, or Gauge meaning Gage Datum meaning Gage Height (G.H.) meaning Gage Rod meaning Gaging Station meaning Gaging Station Number meaning Gaining Stream meaning Gallon Imperial meaning Gallon U.S. meaning Gallons per Capita (GPC) meaning Gallons per Capita (Person) per Day (GPCD) meaning Gallons per Employee (Worker) per Day (GED, or GPED) meaning Gallons per Minute meaning Gamma Radiation meaning Game Fish meaning Gap Analysis meaning Gas meaning Gas Chromatograph/Mass Spectrometer (GC/MS) meaning Gas Chromatography (GC) meaning Gas Chromatography/Flame Ionization Detector (GC/FID) meaning Gasification meaning Gated Pipe meaning GC–MS meaning GED Gallons per Employee per Day meaning Gel meaning General Circulation Models (GCMs) meaning (Truckee River) General Electric Decree California meaning General Improvement District (GID) Nevada meaning General Stream Adjudication meaning Generator meaning Geography meaning Geohydrology meaning Geologic Erosion meaning Geologic Log meaning Geologic Time (History) meaning Geological Age meaning Geological Survey meaning Geological Survey (USGS) meaning Geology meaning Geomorphic Surface meaning Geomorphology (Geomorphic) meaning Geomorphology, Historical meaning Geomorphology, Process meaning Geophysical Log meaning Geophysics, also Geophysical meaning Geoponics meaning Geopressured Reservoir meaning Geosol meaning Geothermal meaning Geothermal Energy meaning Geothermics meaning Geyser meaning GFD meaning Giardia Lamblia meaning Giardiasis meaning Gigawatt Hour (GWh) meaning Gill meaning GIS meaning Glacial meaning Glacial Action meaning Glacial Drift meaning Glacial Epochs meaning Glacial Outwash meaning Glacial Period meaning Glacial Till meaning Glaciate, also Glaciation meaning Glaciated Valley meaning Glacier meaning Glacier Meal meaning Glacioeustacy meaning Glaciofluvial Deposits meaning Glaciolacustrine meaning Glaciology meaning Glade meaning Glauconite meaning Glaze meaning Glob meaning Global Positioning System (GPS) meaning Globule meaning Gobbet meaning Goodness of Fit meaning Gooseneck meaning Gore-Tex meaning GPCD Gallons per capita (per person) per day meaning GPD meaning Grab Sample meaning Graben meaning Grade meaning Grade-Control Structure meaning Graded Stream meaning Grade Stabilization Structure meaning Gradient meaning Gradually Varied Flow meaning Grain meaning Gram meaning Graminoid meaning Gram Molecular Weight (GMW) meaning Granite meaning Granular Activated Carbon (GAC) meaning Granular Activated Carbon Treatment (GACT) meaning Grass/Forb meaning Grassed Waterway or Outlet meaning Grassland meaning Graupel meaning Gravel meaning Gravel Envelope meaning Gravitational Head meaning Gravitational Water meaning Gravity Irrigation meaning Graywater (Gray Water or Greywater) meaning Grazing meaning Great Basin Nevada meaning Great Divide meaning Green Line meaning Greenbelt meaning Greenhouse Effect meaning Greywater (Graywater or Gray Water) meaning Grit meaning Grit Chamber meaning Grit Removal meaning Groin meaning Gross Erosion meaning Gross Reservoir Capacity meaning Gross Duty of Water meaning Gross Precipitation meaning Gross Reservoir Capacity meaning Gross Water Requirement (Farm) meaning Gross Water Yield meaning Ground meaning Ground Cover meaning Ground Rupture meaning Ground Truth meaning Ground Water, also Groundwater meaning Ground Water Barrier meaning Ground Water Basin meaning Ground Water, Confined meaning Ground Water Discharge meaning Ground Water Disposal meaning Ground Water Divide meaning Ground Water Flow meaning Ground Water Flow Model meaning Ground Water, Free meaning Ground Water Hydraulics meaning Ground Water Hydrology meaning Ground Water Law meaning Ground Water Level meaning Ground Water Mining meaning Groundwater Mounding meaning Ground Water Outflow meaning Ground Water Overdraft meaning Ground Water, Perched meaning Ground Water Plume meaning Ground Water Prime Supply meaning Ground Water Recharge meaning Ground Water Registration meaning Ground Water Reservoir meaning Ground Water Reservoir Storage meaning Ground Water Runoff meaning Ground Water Storage meaning Ground Water Storage Capacity meaning Ground Water System meaning Ground Water Table meaning Ground Water, Unconfined meaning Ground Water Under the Direct Influence (UDI) of Surface Water meaning Ground Water Velocity meaning Grout Curtain meaning Growing Season meaning Growth Management Program meaning Gush meaning Gulf meaning Gulf Stream meaning Gully, also Gulley meaning Gully Erosion meaning Gully Reclamation meaning Gumbo meaning Gurgitation meaning Guttation meaning Gutter meaning Gymnosperms (Gymnospermae) meaning Habitat meaning Habitat Conservation Plan (HCP) meaning Habitat Indicator meaning Habitat Type meaning Hail meaning Hailstone meaning Hailstorm meaning Hail Suppression meaning Hair Hygrometer (Hygrograph) meaning Halcyon Days (Water) meaning Half-Flow Interval meaning Haline meaning Haline Marshes meaning Halo meaning Halocline meaning Halophytes meaning Hammock, also Hummock meaning Hanging Valleys meaning Harbor meaning Hardness meaning Hardpan meaning Hard Water meaning Harvested Rainwater meaning Haystack meaning Hazard Adjustment meaning Hazard Mitigation meaning Hazard Ranking System (HRS) meaning Hazardous Material (EPA) meaning Hazardous Substance meaning Hazardous Substances Superfund meaning Hazardous Waste meaning Haze meaning Head meaning Head Cut meaning Head Cutting meaning Head Ditch meaning Header meaning Headgate meaning Headgate Entitlement meaning Headland meaning Head Loss meaning Headrace meaning Headslope meaning Head, Static meaning Head, Total meaning Head Wall meaning Headward Erosion meaning Headwater(s) meaning Headworks meaning Heap Leaching (Mining) meaning Heat Budget, Annual (of a Lake) meaning Heat Exchangers meaning Heath meaning Healthy Ecosystem meaning Heat of Condensation meaning Heat of Vaporization meaning Heat Pump meaning Heat Sink meaning Heat Transfer Agent meaning Heavy Metals meaning Heavy Water meaning Heavy Water (Moderated) Reactor meaning Hectare meaning Hemihydrate meaning Hepatitis meaning Hepatitis A meaning Herbaceous meaning Herbicide meaning Herding Agent meaning Heterogeneity meaning Heterotrophic meaning Hierarchical meaning Higher Aquatic Plants meaning Highest and Best Use meaning Highest Annual Mean meaning High-Grading meaning High-Line Jumpers meaning High Sea meaning High Tide (HT) meaning High Water (HW) meaning High Water Mark (HWM) meaning Historical Geomorphology meaning Historic Variability meaning Histosols meaning Hoarfrost meaning Hogback Ridge meaning Hogshead meaning Holding Medium meaning Holding Pond meaning Holding Tank meaning Holding Time meaning Hole meaning Holistic meaning Holocene meaning Holothurian meaning Homeostasis meaning Homeowner Water System meaning Homogeneity meaning Hookah meaning Hook Gage meaning Horizontal and Vertical Control Points meaning Horn meaning Horsepower (HP) meaning Horsepower, Electrical meaning Hose meaning Hot Spring meaning Hovercraft meaning Human Dimension meaning Human Ecology meaning Human Environment meaning Humid meaning Humidity meaning Humidor meaning Hummock meaning Hummocky meaning Humus meaning Hundred-Year Flood meaning Hungry Water meaning Hurricane meaning Hurricane Forecasting meaning Husbandry meaning Hyades meaning Hybrid System meaning Hydathode meaning Hydrant meaning Hydrate meaning Hydrated meaning Hydration meaning Hydraulic meaning Hydraulic Barrier meaning Hydraulic Conductivity (Ê) meaning Hydraulic Conductivity, Effective meaning Hydraulic Earthfill Dam meaning Hydraulic Fracturing meaning Hydraulic Geometry meaning Hydraulic Grade Line (HGL) meaning Hydraulic Gradient (I) meaning Hydraulic Gradient Pivot Point meaning Hydraulic Head meaning Hydraulic Jump meaning Hydraulic Loading meaning Hydraulic Mining meaning Hydraulic Permeability meaning Hydraulic Radius meaning Hydraulic Ram meaning Hydraulics meaning Hydraulic Transient meaning Hydric meaning Hydric Soil meaning Hydrilla meaning Hydro meaning Hydrobiology meaning Hydrocarbons meaning Hydrocolloid meaning Hydrocompaction meaning Hydrodynamic Force meaning Hydrodynamic Loads meaning Hydrodynamics meaning Hydroelectric meaning Hydroelectric Plant (Conventional) meaning Hydroelectric Plant (Pumped Storage) meaning Hydroelectric Power meaning Hydroelectric Power Water Use (Withdrawals) meaning Hydroelectricity meaning Hydrofoil meaning Hydrogen meaning Hydrogen Bond meaning Hydrogen Sulfide (Gas) meaning Hydrogeologic meaning Hydrogeologic Parameters meaning Hydrogeologic Unit meaning Hydrogeological Cycle meaning Hydrogeology meaning Hydrogeomorphic Unit meaning Hydroglider meaning Hydrognosy meaning Hydrograph meaning Hydrographic meaning Hydrographic Apex meaning Hydrographic Area meaning Hydrographic Area Nevada meaning Hydrographic Region Nevada meaning Hydrography meaning Hydrokinetics meaning Hydrologic meaning Hydrologic Alteration meaning Hydrologic Balance meaning Hydrologic Basin meaning Hydrologic Benchmark meaning Hydrologic Benchmark Station meaning Hydrologic Budget meaning Hydrologic Condition meaning Hydrologic Cycle meaning Hydrologic Equation meaning Hydrologic Equilibrium meaning Hydrologic Model meaning Hydrologic Processes meaning Hydrologic Region meaning Hydrologic Regions California meaning Hydrologic Soil Groups meaning Hydrologic Study Approach meaning Hydrologic Study Area (HSA) meaning Hydrologic System meaning Hydrologic Unit meaning Hydrologic Unit Maps USGS meaning Hydrologic Units (Classification Codes) USGS meaning Hydrological Drought meaning Hydrologist meaning Hydrology meaning Hydrolysis meaning Hydromancy meaning Hydromania meaning Hydrome meaning Hydromechanics meaning Hydrometeor meaning Hydrometeorology meaning Hydrometer meaning Hydrometric Network meaning Hydronic meaning Hydropathy meaning Hydroperiod meaning Hydrophile (Hydrophilic) meaning Hydrophilous meaning Hydrophobe (Hydrophobic) meaning Hydrophobia meaning Hydrophone meaning Hydrophyte meaning Hydrophytic (Vegetation) meaning Hydroplane meaning Hydropneumatic meaning Hydroponics meaning Hydropower meaning Hydroscope meaning Hydroseeding meaning Hydrosol meaning Hydrosphere meaning Hydrostatic Force meaning Hydrostatic Head meaning Hydrostatic Loads meaning Hydrostatic Pressure meaning Hydrostatics meaning Hydrotherapy meaning Hydrothermal meaning Hydrothermal Deposit meaning Hydrothermal Reservoir meaning Hydrothermal Solution meaning Hydro-Transport meaning Hydrotropism meaning Hydrous meaning Hyetal meaning Hyetograph meaning Hyetography meaning Hygrometer meaning Hygrophyte meaning Hygroscope meaning Hygroscopic meaning Hygroscopic Coefficient meaning Hygroscopic Nuclei meaning Hygroscopic Water meaning Hygrothermograph meaning Hypereutrophic (Water) meaning Hyperhaline meaning Hypersaline meaning Hypochlorous Acid meaning Hypolimnetic Discharge meaning Hypolimnetic meaning Hypolimnion meaning Hyporheic Zone meaning Hypothermal meaning Hypothermia meaning Hypothesis meaning Hypothesis Testing meaning Hypoxia meaning Hypsography meaning Hypsometer meaning Ice meaning Ice Age meaning Ice Apron meaning Ice Barrier meaning Iceberg meaning Iceblink meaning Icebound meaning Icecap, or Ice Cap meaning Icefall meaning Icefield meaning Icefog meaning Icefoot meaning Ice-Free meaning Ice-Minus meaning Ice Needle meaning Ice Nucleus meaning Ice-Out meaning Ice Pack meaning Ice Point meaning Icescape meaning Ice Sheet meaning Ice Storm meaning Ice Water meaning Ichthyology meaning Ichthyosaurus (Ichthyosaur) Nevada meaning Icicle meaning Identification meaning Igneous Rock meaning Illinoian meaning Illuvial meaning Illuviation meaning Imbibition meaning Imhoff Cone meaning Imhoff Tank meaning Immerge meaning Immerse meaning Immersible meaning Immiscible meaning Impact Loads meaning Impact Zone meaning Impaired meaning Imperial Valley California meaning Impermeability meaning Impermeable meaning Impermeable Material meaning Impervious meaning Imperviousness meaning Impervious Soils meaning Implied Right meaning Import (Water) meaning Importation (of Water) meaning Impound meaning Impoundment meaning Improved Irrigated Acreage meaning Inactive Storage meaning Inch meaning Inch-Degrees meaning In-Channel Storage meaning In-Channel Use meaning Inchoate Water Right meaning Incidence meaning Incidental Recharge meaning Incidental Waste Water Reclamation meaning Incineration meaning Incised Channel (River) meaning Inclined Staff Gage meaning Inclinometer (Inclometer) meaning Incubate meaning Independent Variable meaning Index Model meaning Index of Wetness meaning Indirect Discharge meaning Indra meaning Industrial Waste meaning Industrial Water Use (Withdrawals) meaning Indicator meaning Indicator (Organism) meaning Indicator Bacteria meaning Indicator Gage meaning Indicator Species meaning Indicator Tests meaning Indigenous meaning Indirect Water Uses meaning Induced Recharge meaning Industrial, Self-supplied Water meaning Industrial Wastewater Facility meaning Industrial Water Use (Withdrawals) meaning Infauna meaning Inference, Bayesian meaning Inference, Classical meaning Inference, Statistical meaning Infiltrate, also Infiltration meaning Infiltration meaning Infiltration and Inflow meaning Infiltration Capacity meaning Infiltration Capacity Curve meaning Infiltration Capacity, Ultimate meaning Infiltration Gallery meaning Infiltration Index meaning Infiltration Rate meaning Infiltrometer meaning Inflatable Dam meaning Inflow meaning Inflow Design Flood meaning Influent meaning Influent Seepage meaning Influent Stream meaning Influent Water meaning Information meaning Information Collection Rule (ICR) meaning Information Management meaning Infrastructure meaning Infuse meaning Initial Detention meaning Initial Loss meaning Initial Storage meaning Initial Water Deficiency meaning Injection meaning Injection Well meaning Injection Well Classes meaning Injection Zone meaning Inland Freshwater Wetlands meaning Inlet meaning In-Line Filtration meaning Inline Reservoir meaning Insecticides meaning Inset meaning Inset Fan meaning In Situ meaning In-Situ Biodegradation meaning In-Situ Stripping meaning In-Situ Vitrification meaning Instantaneous Discharge meaning Instream Aeration meaning Instream Flow meaning Instream Flow Needs meaning Instream Flow Requirement meaning Instream Flow Rights meaning Instream Use meaning Insulated Streams meaning Intangible Flood Damage meaning Integrated (Water) Resource Planning (IRP) meaning Intensive Crops meaning Interbasin Transfer (of Water) meaning Intercepting Drain meaning Interception (Hydrology) meaning Interceptor Sewers meaning Interdisciplinary Approach meaning Interface meaning Interfan-Valley Drainageway meaning Interference (Wells) meaning Interflow meaning Interfluve meaning Interglacial meaning Intermediate Zone meaning Intermittent meaning Intermittent Stream meaning Intermittently Exposed meaning Intermittently Flooded meaning Intermontane Basin meaning Internal Drainage meaning Internal Erosion (of a Dam) meaning Internal Soil Drainage meaning International Water Treaty meaning Interpolate/Interpolation meaning Interstadial meaning Interstate Allocation Nevada and California meaning Interstate Carrier Water Supply meaning Interstate Water Compact meaning Interstate Waters meaning Interstices meaning Interstitial meaning Interstitial Water meaning Intertidal Zone meaning Intervale meaning Intrabasin Transfer (of Water) meaning Intramontane Basin meaning Intrinsic Permeability meaning Intrusive meaning Intrusive Bedrock meaning Inundate meaning Inundation meaning Inundation Map meaning Invasive Plant meaning Inventory meaning Inventorying meaning Inversion meaning Inverted Siphon meaning Ion meaning Ion Exchange meaning Ion Exchange Treatment meaning Ionic Strength meaning Ionosphere meaning Irrecoverable Losses meaning Irregularly Exposed meaning Irregularly Flooded meaning Irrigable Land meaning Irrigate meaning Irrigated Acreage meaning Irrigated Area meaning Irrigated Crop Acreage meaning Irrigated Cropland meaning Irrigated Land meaning Irrigation meaning Irrigation Canal meaning Irrigation Conveyance Loss and Waste meaning Irrigation Delivery Requirement, Farm meaning Irrigation Depletion meaning Irrigation District meaning Irrigation Efficiency (I.E.) meaning Irrigation Frequency meaning Irrigation Lateral meaning Irrigation Leaching Requirement meaning Irrigation Period meaning Irrigation Pit meaning Irrigation Releases meaning Irrigation Requirement, Crop meaning Irrigation Return Flow meaning Irrigation Season meaning Irrigation Season Newlands Project, Nevada meaning Irrigation Structure meaning Irrigation, Supplemental meaning Irrigation Systems meaning Irrigation Systems Tailwater Recovery meaning Irrigation Water meaning Irrigation Water Management meaning Irrigation Water Requirement meaning Irrigation Water Use (Withdrawals) meaning Island meaning Islet meaning Isobar meaning Isobath meaning Isochrone meaning Isoconcentration meaning Isohyet meaning Isohyetal meaning Isohyetal Line meaning Isopiestic meaning Isopleth meaning Isotherm meaning Isothermy meaning Isotopes meaning Isotropy meaning Isthmus meaning Jackson Turbidity Unit (JTU) meaning Jar Test meaning Jet meaning Jet Stream meaning Jetty meaning Jig meaning Joint-Use Capacity meaning Joint-Use Storage meaning Joule meaning Junior (Water) Rights meaning Jurisdictional Wetland meaning Juvenile Water meaning Kame meaning Kansan meaning Karst, also Karstic Region meaning Karst Hydrology meaning Karst Topography meaning Karstic River meaning Kelpie, also Kelpy meaning Kelvin (K) meaning Kelvin Scale meaning Kettle meaning Keyway (Key) meaning KGAL meaning Kibble meaning Kieselguhr meaning Kilogram meaning Kilowatt (KW) meaning Kilowatt–Hour (KWH) meaning Kinematic Viscosity meaning Kinetic Energy (k) meaning Kinetic Rate Coefficient meaning Knifing meaning Known Geothermal Resource Areas (KGRA) meaning Krill meaning La Niña meaning Laboratory Blank meaning Lacustrine meaning Lacustrine Deposits meaning Lacustrine Wetlands meaning Lade meaning Lag (Time) meaning Lagged Endogenous Variable meaning Lagoon meaning Lagoon System meaning Lag Time, also Lagtime meaning Lahar meaning Lahontan Basin meaning Lahontan Valley Wetland System Nevada meaning Lake meaning Lake Bonneville Utah and Nevada meaning Lake Evaporation meaning Lake Lahontan Nevada and California meaning Lake Plain meaning Lake-Plain Terrace meaning Lake Truckee California meaning Lakes, Seepage meaning Lake Whitening meaning Lambert-Beer Equation meaning Laminar Flow meaning Land Application meaning Land Breeze meaning Land Capability meaning Land Capability Classification meaning Land Development (for Irrigation) meaning Land Farming meaning Landfill meaning Landform meaning Landform Element meaning Land Improvement meaning Landlocked meaning Land Pan meaning Land Reclamation meaning Land Reconstruction meaning Land Retirement meaning Lands meaning Landscape meaning Landscape Impoundment meaning Landslide meaning Land Spreading meaning Land Subsidence meaning Land Surface Datum (lsd) meaning Land Treatment Measures meaning Landtype meaning Land Use Plan meaning Land Use Planning meaning Land Voiding meaning Langelier Index (LI) meaning Lap meaning Lapse Rate meaning Large Water System meaning Lasagna Process meaning Laser Land Leveling meaning Late Seral Condition meaning Latent Heat meaning Latent Heat of Condensation meaning Latent Heat of Vaporization meaning Latent Heat Transfer meaning Lateral meaning Lateral Line meaning Lateral Moraines meaning Lateral Sewers meaning Lateritic Soil meaning Launch meaning Laundering Weir meaning Lava Flow meaning Lavage meaning Lavatory meaning Lave meaning LC50 (Lethal Concentration–50) meaning LD50 (Lethal Dose–50) meaning Leach meaning Leachate meaning Leachate Collection System meaning Leached Layer (Soil) meaning Leaching meaning Leaching Efficiency meaning Leaching Field meaning Leaching, Heap meaning Leaching Requirement meaning Lead meaning Lead and Copper Rule meaning Lead (Time) meaning Lead Line meaning Lead Service Line meaning Leadsman meaning Leaf Area Index meaning Leaf Drip meaning Leakage meaning Leaky Aquifer meaning Le Châtelier’s Principle meaning Lee meaning Left Abutment meaning Left Bank meaning Legionella meaning Lemna Gibba (Duckweed) meaning Lentic meaning Lentic System meaning Lentic Waters meaning Lenticles meaning Lenticular Clouds meaning Lethe meaning Levee meaning Levee (Natural) meaning Levee (Manmade) meaning Levee System meaning Level of Development meaning Level of Protection meaning Levigate meaning License meaning Life Cycle Assessment (LCA) meaning Lifeline Rates meaning Life Zone meaning Lift Station meaning Lifts meaning Light-and-Dark Bottle Technique meaning Light-Attenuation Coefficient meaning Light Water meaning Light Water Reactor (LWR) meaning Limb (Rising or Falling) meaning Lime meaning Limestone meaning Limestone Scrubbing meaning Limicolous meaning Liming meaning Limited Degradation meaning Limited Water-Soluble Substances meaning Limiting Factor meaning Limnetic meaning Limnetic Zone meaning Limnology meaning Limnology Hydrobiologist meaning Lindane meaning Lineament meaning Linear meaning Linear Programming meaning Lined Waterway or Outlet meaning Liner meaning Line Storm meaning Lining meaning Lining (Hydraulics) meaning Lipid meaning Liquefaction meaning Liquefy, also Liquify meaning Liquid meaning Liquid Fertilizer meaning Liquid Injection Incinerator meaning Liquor meaning Liter meaning Lithia Water meaning Lithology meaning Lithometeor meaning Lithosphere meaning Lithotripter meaning Litigage meaning Litmus meaning Litmus Paper meaning Litter meaning Littoral meaning Littoral Transport meaning Littoral Water Rights meaning Littoral Zone meaning Livestock Water Use meaning Load meaning Load Allocation (LA) meaning Loading Capacity meaning Load Line meaning Loam meaning Loamy meaning Local Flooding meaning Local (Test-Well) Site Designation Nevada meaning Loch meaning Lock meaning Loess (Soil) meaning Log meaning Log and Safety Boom meaning Logarithm (Log) meaning Logarithmic Transformation meaning Logged meaning Long-Term Acceptance Rate (of Soils) meaning Longitudinal Profile meaning Losing Stream meaning Losses Incidental to Irrigation meaning Lotic meaning Lotic Environment meaning Lotic System meaning Lotic Waters meaning Lough meaning Low meaning Lower Basin States Colorado River Basin meaning Low Flow Frequency Curve meaning Lowland Flooding meaning Low-Level Drawdown meaning Low-Level Outlet meaning Low-Lying meaning Low-Pressure/Low-Volume Irrigation meaning Low Tide meaning Low Water (LW) meaning Low-Water Mark (LWM) meaning Lowest Annual Mean meaning Lowest Floor meaning LTAR (of Soils) meaning Lunette meaning LVEA Nevada meaning Lysimeter meaning M&I (Municipal and Industrial) Water Withdrawals (Use) meaning Maar meaning Macroclimate meaning Macroinvertebrate meaning Macronutrient meaning Macrophyte meaning Macrophytic Algae meaning Maelstrom meaning Magma meaning Magmatic Water meaning Magnetic Separation meaning Main meaning Main Canal System meaning Main Channel Pool California meaning Mainstem meaning Major Flooding meaning Major Landform meaning Majors meaning Make Call meaning Makeup Water meaning Malpais meaning Management Indicator Species (MIS) meaning Management Scenario meaning Managerial Controls meaning Mangrove meaning Mangrove Swamp meaning Manmade Lake meaning Manometer meaning Mantle meaning Mare Clausum meaning Mare Liberum meaning Mare Nostrum meaning Mariculture meaning Marina meaning Marine meaning Marine Life meaning Marine Protection, Research, and Sanctuaries Act (MPRSA) meaning Marine Sanitation Device meaning Marine (Nautical) Surveying meaning Maritime Law meaning Mark meaning Marl meaning Marsh meaning Marsh Gas meaning Marshland meaning Marsh, Tidal meaning Mass Curve meaning Mass Movement meaning Mass Spectrometry meaning Mathematical Model meaning Matric Potential meaning Matrix meaning Matrix Interference meaning Matter meaning Mattress meaning Masonry Dam meaning Maximum Acceptable Toxicant Concentration (MATC) meaning Maximum Contaminant Level Goal (MCLG) meaning Maximum Depth (Reservoir) meaning Maximum Holding Time meaning Maximum Probable Flood meaning Maximum Sustainable Yield meaning Maximum Thermometer meaning Maximum Water Surface (Reservoir) meaning Mayordomo meaning MBAS (Methylene Blue Active Substances) meaning MCL meaning MCLG meaning Meadow meaning Meadow, Dry meaning Meadow, Wet meaning Mean meaning Mean Annual Flood meaning Mean Annual Precipitation meaning Mean Annual Runoff meaning Mean Annual Temperature meaning Mean Concentration of Suspended Sediment meaning Mean Depth meaning Mean Discharge meaning Mean Free Path meaning Mean High Water (MHW) meaning Mean Higher High Tide meaning Mean Low Water (MLW) meaning Mean Lower Low Water meaning Mean Sea Level (MSL) meaning Mean Tide Level meaning Meander meaning Meander Amplitude meaning Meander Belt meaning Meander Breadth meaning Meander Length meaning Meander Line meaning Mean Monthly Temperature meaning Measurement Uncertainty meaning Measuring Point (MP) meaning Measuring Weir meaning Mechanical Aeration meaning Mechanical Dispersion meaning Mechanical Turbulence meaning Median meaning Median Stream Flow (Median Hydro) meaning Median Tolerance Limit meaning Mediterranean meaning Medithermal meaning Medium-Size Water System meaning Melting Point meaning Meltwater meaning Membrane meaning Membrane Filter meaning Membrane Filter Method meaning Membrane Filtration meaning Meniscus meaning Mere meaning Meromictic Lake meaning Meromixis meaning Mesa meaning Mesic meaning Mesoclimate meaning Mesohaline meaning Mesophyte meaning Mesosaline meaning Mesosphere meaning Mesotrophic (Water) meaning Meta- or Met- (Prefix) meaning Metabolism meaning Metalimnion meaning Metamorphic Rock meaning Metamorphism meaning Meteoric Water meaning Meteorological Drought meaning Meteorology meaning Meter meaning Methane meaning Methemoglobinemia meaning Method Blank meaning Methyl Tertiary Butyl Ether (MTBE) meaning Methylcellulose meaning Methylene Blue meaning Methylene Blue Active Substances (MBAS) meaning MGD meaning Microbe meaning Microbial Growth meaning Microbial Load meaning Microbiological Anaerobic Degradation meaning Microbiological Tuberculation meaning Microbiota meaning Microclimate meaning Microcosm meaning Microfauna meaning Microfiltration meaning Microflora meaning Micrograms per Gram (µg/g) meaning Micrograms per Kilogram (µg/kg) meaning Micrograms per Liter (µg/l) meaning Microsiemens per Centimeter (µS/cm) meaning Micron (µ) meaning Micronutrient meaning Microscopic Particulate Analysis (MPA) meaning Microsystem Irrigation meaning Microwave Oven meaning Mid-Seral Condition meaning Midstream meaning Migration meaning Milldam meaning Milliequivalents per Liter (MEQ/L) meaning Milligram (MG) meaning Milligrams Per Liter (mg/l) meaning Million Gallons per Day (MGD) meaning Millipore Filter meaning Millpond meaning Millrace meaning Millstream meaning Mill Wheel meaning Mine Drainage meaning Mineral meaning Mineralization meaning Mineral Resource meaning Mineral Soil meaning Mineral Water meaning Miner’s Inch Western United States meaning Miner’s Inch Nevada meaning Mine Wash meaning Minim meaning Minimal Flood Hazard Areas meaning Minimum Flow Appropriation meaning Minimum Instream Flow (Streamflow) meaning Minimum Moisture Content meaning Minimum Pool meaning Minimum Streamflow meaning Minimum Thermometer meaning Minimum Tillage Farming meaning Mining (of an Aquifer) meaning Mining Water Use meaning Minor Flooding meaning Minors meaning Mirage meaning Mire meaning Miscellaneous Site (Station) meaning Miscible (Liquids) meaning Miscible Displacement meaning Mismatch meaning Missed Detection meaning Mist meaning Mitigation meaning Mixed Liquor meaning Mixed Liquor Suspended Solids (MLSS) meaning Mixed Liquor Volatile Suspended Solids (MLVSS) meaning Mixed Media Filtration meaning Mixohaline meaning Mixosaline meaning Mixolimnion meaning Mizzle meaning Moapa National Wildlife Refuge (NWR) Nevada meaning Moat meaning Mode meaning Model meaning Model Building meaning Model Plant meaning Modeling (Forecasting and Simulation Analysis) meaning Moderate Flood Hazard Areas meaning Moderate Flooding meaning Moderator meaning Moisture meaning Moisture Equivalent meaning Moisture Stress meaning Moisture Tension meaning Molar meaning Mole meaning Molecular Diffusion meaning Molecular Weight meaning Molecule meaning Monimolimnion meaning Monitor meaning Monitoring meaning Monitoring Well meaning Monomictic meaning Monohydrate meaning Monsoon meaning Montane meaning Montane Alkali Lakes meaning Montane Freshwater Lakes meaning Monte Carlo Method meaning Moor meaning Moraine meaning Most Probable Number (MPN) meaning Moulin meaning Mound System meaning Groundwater Mounding meaning Mountain-Valley Fan meaning Mouth of Stream meaning Moutonnée (also Moutonnéed) meaning Movable Bed meaning Moving Average Process meaning MTBE meaning Muck meaning Mud meaning Mud Balls meaning Muddle meaning Mudflat meaning Mudflow meaning Mudslide meaning Mudslide Prone Area meaning Mulch meaning Mulching meaning Multi-Cropping meaning Multiple-Plate Samplers meaning Multiple-Purpose Reservoir meaning Multiple Regression (Model) meaning Multiple Use meaning Multipurpose Project meaning Municipal and Industrial (M&I) Water Withdrawals (Use) meaning Municipal Discharge meaning Municipal Sewage meaning Municipal Wastewater Facility meaning Municipal Water meaning Municipal Watershed meaning Municipal Water System meaning Muskeg meaning Mutagenic meaning Mutchkin meaning Nadir meaning Nanograms per Liter (ng/L) meaning Nanoplankton meaning Nansen Bottle meaning Nappe, also Nap meaning Narghile meaning Narrow meaning Natant meaning National Audubon Society meaning National Economic Development meaning National Energy Policy Act (EPAct) meaning National Environmental Policy Act (NEPA) meaning National Flood Insurance Program (NFIP) meaning National Forest meaning National Geodetic Vertical Datum (NGVD) meaning National Geodetic Vertical Datum of 1929 (NGVD of 1929) meaning National Monument meaning National Municipal Plan meaning National Oceanic and Atmospheric Administration (NOAA) meaning National Oil and Hazardous Substances Contingency Plan (NOHSCP/NCP) meaning National Park meaning National Pollutant Discharge Elimination System (NPDES) meaning National Primary Drinking Water Regulations (NPDWR) meaning National Priorities List (NPL) meaning National Reclamation Act meaning National Response Center (NRC) meaning National Response Team (NRT) meaning National Secondary Drinking Water Regulations (NSDWR) meaning National Stream Quality Accounting Network (NASQAN) meaning National Strike Force (NSF) meaning National Weather Service (NWS) meaning National Wilderness Preservation System meaning National Wildlife Refuge (NWR) System meaning National Wildlife Refuges (NWR) Nevada meaning Native Species meaning Natural Attenuation meaning Natural Conditions meaning Natural Control meaning Natural Erosion meaning Natural Flow meaning Natural Heritage Program Nevada meaning Natural Logarithm (LN) meaning Natural Precipitation meaning Natural Recharge meaning Natural Resource meaning Natural Resources Conservation Service (NRCS) meaning Natural Resources Defense Council (NRDC) meaning Natural Sink meaning Natural Substrate meaning The Nature Conservancy meaning Naturopathy meaning Nauplius meaning Nautical meaning Nautical Mile meaning Navigable Waters meaning Navigable Waters Nevada meaning Navigate meaning Navigational Water Use meaning Neap Tide meaning Nebraskan meaning Neck Cutoff meaning Needle-Leaved Deciduous meaning Needle-Leaved Evergreen meaning Negotiated Settlement (Public Law 101–618) Nevada and California meaning Nekton meaning NEPA meaning Nephelometer meaning Nephelometric meaning Nephelometric Turbidity Unit (NTU) meaning Neritic meaning Neritic Zone meaning Net Consumptive Use meaning Net Depletion meaning Net Duty of Water meaning Net Economic Benefits meaning Net Precipitation meaning Net (Storm) Rain meaning Net Reservoir Evaporation meaning Net Water Demand meaning Net Water Use meaning Net Water Yield meaning Neuston meaning Neutralization meaning Neutral Soil meaning Nevada Natural Heritage Site Nevada meaning Nevada Project WET Nevada meaning Névé meaning New Construction meaning Newlands (Irrigation) Project Nevada meaning Newlands (Irrigation) Project Efficiency Nevada meaning Newlands Water Protective Association (NWPA) Nevada meaning New Source Performance Standards (NSPS) meaning Nick Point (Bedscarp) meaning Nimbostratus Clouds meaning Nimbus Clouds meaning Ninetieth Percentile meaning NIPDWR meaning Nitrates meaning Nitrification meaning Nitrogen meaning Nitrogen Cycle meaning Nitrogen Fixation meaning Nitrogen-Fixing Plants meaning Nitrogen Narcosis meaning Nitrogenous BOD meaning Nitrogenous Waste meaning Nitrogen Supersaturation meaning Nival meaning Niverous meaning No Action Alternative meaning NOAA meaning Noble Metal meaning Noggin meaning Non-Aqueous-Phase Liquids (NAPLs) meaning Noncohesive Soil meaning Non-Community Water System (NCWS) meaning Non-Consumptive Water Use meaning Non-Contact Cooling Water meaning Non-Contact Recreation meaning Non-Contributing Area meaning Non-Conventional Pollutants meaning Non-Degradation Policy meaning Nondestructive Testing (NDT) meaning Nondischarging Treatment Plant meaning Non-Filtrable Residue meaning Nonfull-Cost Entitlement (USBR) meaning Nonhazardous Oil Field Waste (NOW) meaning Non-Irrigated Cropland meaning Nonpersistent Emergents meaning Nonpersistent Pollutant meaning Non-Point Source (NPS) Pollution meaning Non-Point Water Pollution meaning Nonporous meaning Non-Potable meaning Nonreimbursable Costs meaning Nonrenewable Resources meaning Nonstructural Measures meaning Nonstructural Flood Control Measures meaning Nonstructural Floodplain Management Measures meaning Non-Threshold Pollutant meaning Nonuniform Flow meaning Non-Volatile Solids (NVS) meaning Non-Volatile Suspended Solids (NVSS) meaning Non-Velocity Coastal Flood Area meaning Nonwithdrawal Use meaning Noria meaning Normal (Hydrologic) meaning Normal Annual Precipitation meaning Normal Daily Temperature meaning Normal Distribution meaning Normal Fault meaning Normal Water Level meaning Normal Year meaning Normalized Demand meaning North American Vertical Datum Plane meaning Notch meaning No Till Farming meaning NOX meaning Noxious Plant meaning Noxious Weed meaning NPDES meaning NPDES Permit meaning NPS Pollution meaning NTU meaning Nucleating Agent meaning Nucleation meaning Nuisance Flooding meaning Nutrient meaning Nutrient Cycle meaning Nutrient Pollution meaning Nutrient Sink meaning Nutrient Spiraling meaning NWPA meaning NWS meaning Oasis meaning Obligate Hydrophytes meaning Observation Well meaning Obsidian Hydration Studies meaning Obstruction meaning OCAP (Operating Criteria and Procedures) Nevada meaning Occluded Front meaning Ocean meaning Oceanaut meaning Ocean Discharge Waiver meaning Ocean Dumping Permit meaning Ocean Floor Sediment meaning Oceans (World) meaning Ocean Thermal Energy Conversion (OTEC) meaning Ocean Thermal Gradients meaning Oceanography meaning Odor Threshold meaning Off-Channel Use meaning Off-Line Reservoir meaning Off-Piste meaning Off-Site Use meaning Offset meaning Offshore meaning Offstream (Off-Stream) Use meaning Ogee meaning Oil Skimmer meaning Oil Slick meaning Oil Spill meaning Old meaning Old Field meaning Old Growth meaning Oligohaline meaning Oligosaline meaning On-Fan Drainageway meaning Once-Through Cooling Water meaning One Hundred-Year Flood meaning One-Percent Chance Flood meaning Onfarm meaning Onshore meaning Oocyst meaning Ooze meaning Opalized meaning Open meaning Open Canopy meaning Open Channel System meaning Open-Cycle Cooling meaning Open Drains meaning Open or Screened Interval meaning Open-Pit Mining meaning Open River Channel meaning Open Space/Open Space Use meaning Open Water Loop meaning Operating Criteria meaning Operating Criteria and Procedures (OCAP) Nevada meaning Operation and Maintenance Costs (O&M) meaning Operational Concept meaning Operational Losses meaning Operational Spill meaning Orbital Wave meaning Ordinary Least Squares (OLS) meaning Ordinate (Symbol Y) meaning Organic meaning Organic Carbon (OC) meaning Organic Load meaning Organic Mass meaning Organic Matter meaning Organic Nitrogen meaning Organic Soil meaning Organic Waste meaning Organism meaning (Total) Organism Count meaning Organism Count/Area meaning Organism Count/Volume meaning Organochlorine Compounds meaning Organotins meaning Orifice meaning Orogenic meaning Orographic Cloud meaning Orographic Precipitation meaning Orographic Storm meaning Orr Ditch Decree Nevada and California meaning OS3 meaning Osmoregulation meaning Osmosis meaning Osmotic Lysis meaning Osmotic Potential meaning Osmotic Pressure meaning Osmotroph meaning Other Water Use meaning Outcrop meaning Outfall meaning Outflow, also Outflows meaning Outflow Channel meaning Outlet meaning Outlet Channel meaning Outlet Discharge Structure meaning Outliers meaning Outwash meaning Ouzel, also Ousel meaning Overall Project Efficiency meaning Overbank Flow meaning Overbank Storage meaning Overburden meaning Overchute meaning Overdraft meaning Overfall meaning Overfall Dam meaning Overfish meaning Overfishing meaning Overflow meaning Overflow Rate meaning Overflow Standpipe meaning Overhead Irrigation meaning Overland Flow meaning Overstory meaning Overturn meaning Ownership Entitlements (USBR) meaning Oxbow meaning Oxbow Lake meaning Oxidant meaning Oxidase meaning Oxidation (Oxidizing) meaning Oxidation Ditch meaning Oxidation Pond meaning Oxidation-Reduction Potential meaning Oxidized Rhizosphere meaning Oxygen meaning Oxygen Deficit meaning Oxygen Demand meaning Oxygen-Demanding Waste meaning Oxygen Depletion meaning Oxygen Sag Curve meaning Oxygen Saturation Capacity meaning Oxygenate meaning Ozonation meaning Ozonator meaning Ozone meaning Ozone Hole meaning Ozone Layer meaning Ozone Layer Depletion meaning Packed Tower meaning Packed Tower Aeration meaning Packer meaning Pahranagat National Wildlife Refuge (NWR) Nevada meaning Palatable Water meaning Paleobotany meaning Paleopedology meaning Palmer Drought Severity Index (PDSI) meaning Palustrine meaning Palustrine Wetlands meaning PAMs meaning Pan meaning Pan Evaporation meaning Paralytic Shellfish Poisoning (PSP) meaning Parameter meaning Parapet Wall meaning Parent Material meaning Parhelic Circle meaning Parna Dune meaning Parshall Flume meaning Partial Ballena meaning Partial Duration Flood Series meaning Partial Penetration meaning Partial Pressure meaning Partial-Record Station meaning Particle Count meaning Particle Size meaning Particle Size Classification meaning Particulate Loading meaning Particulate Matter meaning Particulate Organic Matter (POM) meaning Particulate Phosphate meaning Particulates meaning Particulate Transport meaning Parts Per Billion (PPB) meaning Parts Per Million (PPM) meaning Parts Per Thousands (PPT) meaning Passive Solar Water Heater meaning Pathogen meaning Patchiness meaning PCBs (Polychlorinated Biphenyls) meaning PCE meaning Peak Flow meaning Peaking meaning Peak Load (Power) meaning Peak Use Rate meaning Peat meaning Peat Bog meaning Peatland meaning Pebble meaning Peclet Number meaning Pediment meaning Pedisediment meaning Pedogenic (Pedogenesis) meaning Pedology meaning Pelagic meaning Pelite meaning Peneplain, also Peneplane meaning Peninsula meaning Penstock meaning Per Capita Water Use meaning Per Worker Water Use meaning Percent Composition (Percent of Total) meaning Percent of Normal (Drought Index) meaning Percent Saturation meaning Percent Sodium meaning Perched Ground Water meaning Perched Streams meaning Perched Water Table meaning Perchloroethylene (PCE) (Tetrachloroethylene) meaning Perclene meaning Percolating Waters meaning Percolation meaning Percolation, Deep meaning Percolation Path meaning Percolation Pond meaning Percolation Rate meaning Percolation Test meaning Perennial Crops meaning Perennial Grass meaning Perennial Stream meaning Perennial Yield (Ground Water) meaning Perfected Water Right meaning Perfected Water Permit meaning Perfection meaning Perforation of Wells meaning Periodic Station meaning Periphyton meaning Perlite, also Pearlite meaning Permafrost meaning Permanent Control meaning Permanent Hardness meaning Permanent Monument meaning Permeability meaning Permeability Coefficient meaning Permeability, Effective meaning Permeability, Intrinsic meaning Permeability Soil meaning Permeable meaning Permeable Soils meaning Permissible Velocity meaning Permit meaning Permit, Water Nevada meaning Permit System meaning Permitted Water Right Nevada meaning Permitted Well meaning Persistence meaning Persistent Emergent meaning Persistent Pesticides meaning Perspiration meaning Perspire meaning Pervious meaning Pervious Paving meaning Pervious Zone meaning Pesticide meaning Peterson Dredge meaning Petrify meaning Petrochemicals meaning Petroleum Derivatives meaning pH (Hydrogen Ion Concentration, or Potential of Hydrogen) meaning Phagotroph meaning Phase meaning Phase Rule meaning Phenology meaning Phenolphthalein Alkalinity meaning Phosphates meaning Phosphoric Acid meaning Phosphorus meaning Photic meaning Photic Zone meaning Photoautotroph meaning Photolysis meaning Photolysis (of Water) meaning Photosynthesis meaning Phreatic meaning Phreatic Line meaning Phreatic Surface meaning Phreatic Water meaning Phreato–Magmatic meaning Phreatophyte meaning Phycology meaning Physical-Chemical Treatment Processes meaning Physical Landscape meaning Physical Weathering meaning Physiographic Divisions meaning Physiographic Province meaning Physiography meaning Phytometer meaning Phytoplankton meaning Phytoplankton Die-Off meaning Phyto-Remediation (Phytoremediation) meaning Phytotoxicant meaning Phytotoxicity meaning Picocurie (PC, pCi) meaning Piedmont meaning Piedmont Slope meaning Pier meaning Piezometer meaning Piezometer (Open Well) meaning Piezometric Head meaning Piezometric Surface meaning Piezometry meaning Pingo meaning Pioneer Plants meaning Pipeline meaning Piping meaning Pirate Stream meaning Pitot Tube meaning Pitting meaning Place of Use meaning Place of Use Limitation meaning Placer meaning Plain meaning Plan meaning Plane meaning Plankton meaning Plankton Bloom meaning Planning meaning Plant Community meaning Plant Nutrients meaning Plash meaning Plasma meaning Plasmolysis meaning Plastic Soil meaning Plate Boundaries meaning Plate Tectonics meaning Plateau meaning Playa meaning Playa Lake meaning Pleuston meaning Plimsoll’s Mark meaning Pliocene meaning Plop meaning Plow, or Plough meaning Plug meaning Plug Flow meaning Plugging meaning Plumb meaning Plumber meaning Plumbing meaning Plume meaning Plunge meaning Pluvial meaning Pluvial Lake meaning Pluvial Period meaning Pluviometer meaning Pluvious meaning Pocosin meaning Pogonip meaning Point Bar meaning Point Discharge meaning Point of Compliance (POC) meaning Point of Diversion meaning Point(s) of Diversion meaning Point-of-Entry (POE) Treatment Device meaning Point Pollution Source meaning Point Precipitation meaning Point Source (PS) meaning Point Source (PS) Pollution meaning Point Waste Load Allocation meaning Polar (Ice) Cap meaning Polder meaning Policy meaning Polishing meaning Pollutant meaning Polluted meaning Pollution meaning Pollution Indicator Organism meaning Polyacrylamides (PAMs) meaning Polychlorinated Biphenyls (PCBs) meaning Polychlorinated Naphthalenes (PCNs) meaning Polycyclic Aromatic Hydrocarbons/Polararomatic Hydrocarbons (PAHs) meaning Polynuclear Aromatic Hydrocarbons (PNAs) meaning Polyelectrolyte meaning Polyhaline meaning Polynya meaning Polysaline meaning Pond meaning Pond Scum meaning Pond, Wastewater Stabilization meaning Pondage meaning Pool meaning Pool-Riffle Ratio meaning Popple meaning Population meaning Population Density meaning Population Equivalent (PE) meaning Pore meaning Pore Pressure meaning Pore Space meaning Porosity meaning Porosity, Effective meaning Porous meaning Port meaning Positive Association meaning Post-Closure Plan meaning Postdiluvian, also Postdiluvial meaning Postglacial meaning Potable Water meaning Potamon Zone meaning Potential meaning Potential Drop meaning Potential Energy meaning Potential Evapotranspiration meaning Potential Natural Water Loss meaning Potential Rate of Evaporation meaning Potential Supply meaning Potential Yield (or Well Capacity) meaning Potentiometric Surface meaning Pothole meaning Potometer meaning Pour meaning Pour Point meaning Practicably Irrigable Acreage (PIA) meaning Prairie meaning Prairie Pothole meaning Precautionary Drawdown meaning Prechlorination meaning Precipitable Water meaning Precipitant meaning Precipitate meaning Precipitation meaning Precipitation, Effective meaning Precipitation Gage meaning Precipitation, Initial meaning Precipitation, Intensity meaning Precipitation, Probable Maximum meaning Precision meaning Preference System meaning Preferred Use meaning Preferred Use Nevada meaning Preheating meaning Preliminary Settlement Agreement (PSA) Nevada meaning Prescribed Fire (or Burning) meaning Prescribed Water Rights meaning Prescription meaning Prescriptive Water Rights meaning Preservation meaning Preservative meaning Pressure (p) meaning Pressure Filter meaning Pressure Filtration meaning Pressure Gage meaning Pressure Gradient meaning Pressure Head meaning Pressure Relief Pipes meaning Pressurized Water Reactor (PWR) meaning Presumptive Test meaning Pretreatment meaning Price (or Pygmy) Current Meter meaning Price Elasticity (of Water) meaning Primacy meaning Primary Cost meaning Primary Data meaning Primary Drinking Water Regulation meaning Primary Drinking Water Standards meaning Primary Frontal Dune meaning Primary Productivity meaning Primary Settling Tank meaning Primary Sludge meaning Primary Standards meaning Primary Succession meaning Primary Wastewater Treatment meaning Prime Agricultural Lands meaning Farmland, Prime meaning Prime Water meaning Priming meaning Principal Spillway meaning Prior Appropriation Doctrine meaning Priority meaning Priority Date meaning Priority of Use and Statutory Preferences meaning Priority Pollutants meaning Pristine meaning Probabilistic Process meaning Probability meaning Probability Distribution meaning Probability of Detection meaning Probable Maximum Flood (PMF) meaning Probable Maximum Precipitation meaning Process Fluid Stabilization Nevada meaning Process Geomorphology meaning Process Variable meaning Process Verification meaning Process Wastewater meaning Process Water meaning Produced Water meaning Product Water meaning Profile meaning Profundal Zone meaning Project Conveyance Efficiency meaning Project Crop Water Requirement meaning Project Dependable Capacity (PDC) meaning Project Efficiency meaning Project Evaluation Period meaning Project Installation Period meaning Project Farm Headgate Requirement meaning Project WET (Water Education for Teachers) Nevada meaning Project Yield meaning Projection meaning Promontory meaning Proof of Beneficial Use meaning Proof of Appropriation meaning Proper Functioning Condition meaning Property Right meaning Propylitic meaning Protozoa meaning Provenance meaning Province meaning Pseudomorphs meaning Psychrometer meaning Public Domain (Lands) meaning Public Interest, or Public Welfare meaning Public Involvement meaning Public Land Survey System (PLSS) meaning Public Law 92–500 (PL 92–500) meaning Public Law 93–523 (PL 93–523) meaning Publicly-Owned Treatment Works (POTW) meaning Public Scoping meaning Public Service meaning Public-Service Corporation meaning Public Trust Doctrine meaning Public Utility meaning Public Water System (PWS) meaning Public Water Use meaning Puddle meaning Puddling meaning Pueblo Right meaning Pump meaning Pump (Head) Curve meaning Pump Lift meaning Pumped Hydroelectric Storage meaning Pumped Storage meaning Pumped Storage Plant meaning Pumped Storage Project meaning Pumping-Generating Plant meaning Pumping Head meaning Pumping Station meaning Pumping Test meaning Purge meaning Purgeable Organics meaning Purification (Water) meaning Purification Process (Water) meaning Purify (Water) meaning Purl meaning Putrefaction meaning Quaking Bog meaning Qualitative Analysis meaning Quantitative Analysis meaning Quantitative Precipitation Forecast (QPF) meaning Quart meaning Quarter-Flow Interval meaning Quartz meaning Quartzite meaning Quaternary Period meaning Quench meaning Quench Tank meaning Quicklime meaning Quicksand meaning R2 (Coefficient of Determination) meaning Race meaning Raceway meaning Radial Drainage meaning Radial Flow meaning Radioisotope meaning Radionuclides meaning Radius of Influence meaning Radon meaning Rain meaning Rain Area meaning Rainband meaning Rain Barrel meaning Rainbow meaning Raindrop meaning Rainfall meaning Rainfall Component meaning Rainfall Duration meaning Rainfall, Excess meaning Rainfall, Excessive meaning Rainfall Frequency meaning Rainfall (Precipitation) Intensity Area Curve meaning Rainfall (Precipitation) Intensity-Duration Curve meaning Rainfall (Precipitation) Intensity-Duration-frequency Curve meaning Rainfall (Precipitation) Intensity Frequency meaning Rainfall, Maximization meaning Rainfall Rate meaning Rainfall (Precipitation), Residual meaning Rain Forest meaning Rain Gauge, also Rain Gage meaning Rain, Heavy meaning Rain, Light meaning Rainmaker meaning Rain, Moderate meaning Rain, Net meaning Rain Sensor meaning Rain Shadow meaning Rainstick meaning Rainwater meaning Raised Bogs meaning Random Sample meaning Random Variable meaning Range meaning Range Carrying Capacity meaning Range Condition meaning Range Line meaning Rankine Scale meaning Rapid Drawdown meaning Rapids meaning Rapture of the Deep meaning Rare Species meaning Rate Structures (Water and Wastewater Treatment) meaning Rating Curve meaning Rating Table meaning Rational Method (or Formula) meaning Rates of Rise and Fall meaning Ravine meaning Raw Sewage meaning Raw Sludge meaning Raw Water meaning RCRA meaning Reach (of River) meaning Readily Water-Soluble Substances meaning Reaeration meaning Reaeration (of Streams) meaning Reasonable and Beneficial Use California meaning Reasonable Pump Lift meaning Reasonable Use meaning Reasonable Use Theory meaning Réaumur, or Reaumur (R) meaning Recalcitrant meaning Recarbonation (Recarbonization) meaning Receiving Waters meaning Recessional Moraine meaning Recession Hydrograph (Curve) meaning Recharge (Hydrologic) meaning Recharge Area (Groundwater) meaning Recharge, Artificial meaning Recharge Basin meaning Recharge Boundary meaning Recharge, Incidental meaning Recharge, Induced meaning Recharge, Natural meaning Recharge Rate meaning Recharge Well meaning Recharge Zone meaning Recirculated Water meaning Recirculation meaning Reclamation meaning Reclamation Act of 1902 meaning Reclamation District meaning Reclamation Drought Index (RDI) meaning Reclamation Service meaning Reclaimed Sewage meaning Reclaimed Waste Water meaning Reclaimed Water meaning Reclamation meaning Reclamation Act meaning Reclamation District meaning Reclamation Project meaning Reclamation of Wastewater meaning Reclamation Withdrawal meaning Recommended Maximum Contaminant Level (RMCL) meaning Reconditioning (Water Well) meaning Reconnaissance meaning Reconnaissance Report meaning Reconstitute meaning Recorder, Steam Flow meaning Recording Gage meaning Recoverable from Bottom Material meaning Recoverable Ground Water meaning Recovery meaning Recovery Plan meaning Recreation Resource meaning Recreation Visitor Day (RVD) meaning Recreational Benefit meaning Recreational Rivers meaning Rectangular Pattern meaning Rectify meaning Recurrence Interval (Return Period) meaning Recycled Water meaning Recycling meaning Red Book meaning Redd meaning Red Data Book meaning Red Snow meaning Red Tide meaning Reef meaning Reference Wetland meaning Reflectance meaning Reforestation meaning Regelation meaning Regime meaning Regimen of a Stream meaning Regional Response Team (RRT) meaning Regression meaning Regression Analysis meaning Regular Program meaning Regulation (of a Stream) meaning Regulation Reservoir meaning Regulatory Flood Datum (RFD) meaning Regulatory Floodplain meaning Regulatory Floodway meaning Rehydrate meaning Reimbursable Costs meaning Rejuvenation meaning Relation, Doctrine of meaning Relative Humidity meaning Release meaning Relicensing meaning Relict meaning Reliction meaning Reliction, Doctrine of Nevada meaning Relief Ratio meaning Relief Wells (of a Dam) meaning Remedial Investigation (RI) meaning Remedial Response meaning Remediation meaning Remnant meaning Renewable Energy meaning Renewable (Natural) Resource meaning Renewable Water Supply meaning Replenishment meaning Replenishment District meaning Replicate Samples meaning Representativeness meaning Representative Sample meaning Repurified Water meaning Re-Regulating Reservoir meaning Reservation meaning Reservation Doctrine meaning Reservation or Withdrawal of Water meaning Reserve Capacity meaning Reserved Water Rights (Federal) meaning Reserves meaning Reserve Supply meaning Reservoir (Water) meaning Reservoir Area meaning Reservoir, Multipurpose meaning Reservoir, Re-Regulating meaning Reservoir, Retarding meaning Reservoir, Single-Purpose meaning Reservoir Surface meaning Residential Water Use meaning Resident Population meaning Residual Average Annual Flood Damages meaning Residual Chlorine meaning Residual Depression Storage meaning Residual Detention Storage meaning Residual Discharge meaning Residual Flood Damages meaning Residual Mass Diagram meaning Residual Sodium Carbonate (RSC) meaning Residue on Evaporation (ROE) meaning Residuum meaning Resilience meaning Resolution meaning Resources meaning Resource Conservation and Recovery Act (RCRA) meaning Resource Management Plan (RMP) meaning Resource Management System meaning Resource Monitoring meaning Respiration meaning Response Action meaning Restoration meaning Resuspended meaning Retaining Wall meaning Retarding Reservoir meaning Retention meaning Retention Basin meaning Retention Facility meaning Retention Storage meaning Retention Time meaning Return Flow meaning Return Flow (Irrigation) meaning Return Flow Credit meaning Return Flow Credit Nevada meaning Return Period (or Recurrence Interval) meaning Return Seepage meaning Reuse (of Water) meaning Reuse Systems meaning Reuse Water meaning Reverse Osmosis meaning Revetment meaning Revetted Levee meaning Reynolds Number meaning Rhabdomancy meaning Rheology meaning Rheotaxis meaning Rhithron Zone meaning Richness meaning Ridge Lines meaning Riffle meaning Rift meaning Right meaning Right Abutment meaning Right Bank meaning Right of Free Capture meaning Rill, also Rille meaning Rill Erosion meaning Rime meaning Riparian meaning Riparian Areas (Habitat) meaning Riparian Doctrine meaning Riparian Ecosystem meaning Riparian Habitat meaning Riparian Land meaning Riparian Lease meaning Riparian Owner meaning Riparian Proprietor meaning Riparian Rights meaning Riparian Vegetation meaning Riparian Water meaning Riparian Water Rights meaning Riparian Zone meaning Rip Current meaning Rip Rap (also Riprap) meaning Rip Tide meaning Ripple meaning Ripple Mark meaning Riser meaning Rising Limb meaning Rising Sludge meaning River meaning River Banks meaning River Basin meaning River Basin Plan meaning River Channels meaning River Flooding meaning River Flow Model meaning River Gage Reach meaning Riverine meaning Riverine (Systems) meaning River Mile meaning River Mileage meaning River Reach meaning Rivers, Classifications meaning River Stage meaning Riverwash meaning Rivulet meaning Robinson Projection meaning Roche Moutonnée meaning Rock Varnish meaning Rockfill Dam meaning Rock Flour meaning Roil meaning Roily meaning Rooster Tail meaning Root Hair meaning Root Pressure meaning Rootwad meaning Root Zone meaning Rotating Biological Contractor (RBC) meaning Rotation meaning Rotation Delivery meaning Rotation Management meaning Rough Fish meaning Roughness meaning Roughness Coefficient meaning Routing (Hydraulics) meaning Ruby Lake National Wildlife Refuge (NWR) Nevada meaning Ruderal meaning Rugosity meaning Run meaning Runlet meaning Runnel meaning Running Water meaning Runoff meaning Runoff, Adjusted Mean Annual meaning Runoff, Average Annual meaning Runoff Curve Number meaning Runoff Cycle meaning Runoff, Direct meaning Runoff, Ground Water meaning Runoff in Inches meaning Runoff Percentage meaning Runoff Plots meaning Runoff Rate meaning Runoff, Surface meaning Run-of-River Dam meaning Runs meaning Rural–Domestic Water meaning Rural Water Use meaning Sacramento Model meaning Sacramento–San Joaquin Delta California meaning Sacrificial Anode meaning Safe Drinking Water Act SDWA (Public Law 93–523) meaning Safe Water meaning Safe Yield meaning Sag Pipe meaning Sag Pond meaning Salina meaning Salination meaning Saline meaning Saline/Poor Quality Aquifer meaning Saline Marsh meaning Saline Seeps meaning Saline Sodic Land meaning Saline Soil meaning Saline Water meaning Salinity meaning Salinity Control meaning Salinity Intrusion meaning Salinization meaning Salmonella Typhosa meaning Salmonellosis meaning Salt meaning Saltation meaning Salt Flat meaning Salt Lake meaning Salt Marsh meaning Salt Pan meaning Salts meaning Salt Sink meaning Salt Water meaning Salt-Water Barrier meaning Salt-Water Intrusion meaning Salt-Water Marsh meaning Salvage meaning Salvage Harvest meaning Salvaged Water meaning Sample meaning Sample Size meaning Sand meaning Sandbar meaning Sand Dune meaning Sand Filter meaning Sandstone Aquifer meaning Sand Trap meaning Sanitary Landfill meaning Sanitary Seal (Water Well) meaning Sanitary Sewer meaning Sanitary Survey meaning Sanitary Water meaning Sandy Soil meaning Saprobien System meaning Sapropel meaning Saprophyte meaning Sapwood meaning Sastruga meaning Satellite (Wastewater Treatment) Plant meaning Saturated meaning Saturated Adiabatic Lapse Rate meaning Saturated Air meaning Saturated Soils meaning Saturated Thickness (Aquifer) meaning Saturated Vapor Pressure meaning Saturated Zone meaning Saturation meaning Saturation Deficit meaning Saturation Mixing Ratio meaning Saturation Point meaning Saturation Vapor Pressure meaning Saturation, Zone of meaning Sauna meaning Sausage Dam meaning Savanna, also Savannah meaning Saxitoxin meaning Scabland meaning Scald meaning Scale meaning Scarify meaning Scarp meaning Scenic Rivers meaning Scenic Waterway meaning Schedule of Compliance meaning Scheduled Delivery meaning Schist meaning Schistosomiasis meaning Schmutzdecke Layer meaning Science Advisory Board (SAB) meaning Scientific Method meaning Scour meaning Scouring Sluice meaning Scour Pools meaning Screening meaning Scrubber, Spray meaning Scrubber, Venturi meaning Scuba meaning Scud meaning Scum meaning Scupper meaning S–Curve meaning Scuttlebutt meaning Sea meaning Sea Breeze meaning Seacock meaning Seal meaning Sealant meaning Sea Level meaning Sea Mile meaning (Well) Seal meaning Seas (World) meaning Seashore meaning Season meaning Seasonal Adjustment meaning Seasonal Adjustment Factors meaning Seasonal Application Efficiency (SAE) meaning Seasonal Factors meaning Seasonal or Intermittent Streams meaning Seasonality meaning Seasonally Adjusted (S.A.) meaning Seasonally Flooded (Estuarine) meaning Seasonal Wetlands meaning Sea Stack meaning Sea Wall, also Seawall meaning Seawater meaning Secchi Depth meaning Secchi Disc (Disk) meaning Second-Feet meaning Secondarily Improved Pastures meaning Secondary Benefits meaning Secondary Costs meaning Secondary Data meaning Secondary Drinking Water Regulations meaning Secondary Drinking Water Standards meaning Secondary Maximum Contaminant Level (SMCL) meaning Secondary Porosity meaning Secondary Recovery meaning Secondary Settling Tank meaning Secondary Standards meaning Secondary Succession meaning Secondary Wastewater Treatment meaning Secondary Wetlands Lahontan Valley, Nevada meaning Section meaning Section 319 (Clean Water Act) meaning Section 404 (Clean Water Act) meaning Section 404 Permit meaning Secular Trend meaning Secure Landfill meaning Secure Maximum Contaminant Level meaning Sediment meaning Sediment Control meaning Sediment (Catchment) Dam meaning Sediment-Delivery Ratio meaning Sediment Deposition meaning Sediment Discharge meaning Sediment Discharge, Total meaning Sediment Discharge, Unmeasured meaning Sediment Load meaning Sediment Load, Total meaning Sediment Oxygen Demand (SOD) meaning Sediment Pool meaning Sediment Storage meaning Sediment Storage (Reservoir) meaning Sediment-Transport Curve meaning Sediment Yield meaning Sedimentary Cycle meaning Sedimentary Rock meaning Sedimentation meaning Sedimentation Basin (SB) meaning Sedimentation Tanks meaning Sediments meaning Seep meaning Seepage meaning Seepage Bed meaning Seepage Lakes meaning Seepage Losses meaning Seepage Pit meaning Selective Ion Probe meaning Selenium meaning Self-Produced Water meaning Self-Purification meaning Self-Supplied Water meaning Self-Supplied Water (Industrial) meaning Selva meaning Semi-Bolson meaning Semi-Bolson Floor meaning Semiaquatic meaning Semiarid meaning Semiconfined (Aquifer) meaning Semipermeable meaning Semipermeable Membrane meaning Senescence (Senescent) meaning Senile meaning Senior Rights meaning Sensitive Species meaning Septage meaning Septic Tank meaning Septic Tank Absorption Field meaning Sequencing Batch Reactors (SBR) meaning Sequestering Agent meaning Sérac meaning Sere meaning Serial Distribution meaning Service Area meaning Service Connector meaning Service Line Sample meaning Service Pipe meaning Seston meaning Setback meaning Settle meaning Settleable Solids meaning Settling Basin meaning Settling Pond meaning Settling Tank meaning Settling Velocity meaning Seven-Day 10-Year Low Flow (7Q10) meaning Seven Seas meaning Severance (Water Rights) meaning Sewage meaning Sewage Fungus meaning Sewage Lagoon meaning Sewage Sludge meaning Sewage System meaning Sewage Treatment meaning Sewage Treatment Plant meaning Sewage Treatment Return Flow meaning Sewer meaning Sewerage meaning Shadoof, also Shaduf meaning Shaft meaning Shallow Well meaning Sharp-crested Weir meaning Shear meaning Sheet meaning Sheet Erosion meaning Sheetflood meaning Sheet Flow meaning Sheetflow (Sheet Flow) Area meaning Sheet Piling meaning Sheldon National Wildlife Refuge (NWR) Nevada meaning Shelf Ice meaning Shifting Control meaning Shigella Dysenteriae meaning Shoal meaning Shock Load meaning Shoot meaning Shorebird meaning Shorefront meaning Shore Life meaning Short-Circuiting meaning Shoulder meaning Shower meaning Showerhead meaning Shrink-Swell Potential meaning Shrub meaning S–Hydrograph meaning SIC Code meaning Sideslope meaning (The) Sierra Club meaning Sierra Club Legal Defense Fund meaning Sierra Valley Decree California–Nevada meaning Sierra Wave Sierra Nevada Mountains meaning Sigmoid Growth meaning Significant (Statistical) meaning Significant Hydrologic Resources (SHR) meaning Significant Municipal Facilities meaning Silica meaning Sill meaning Silt meaning Siltation meaning Silver Iodide meaning Silver Iodide Generator meaning Silver Iodide Seeding meaning Silvics meaning Silviculture meaning Simulation Analysis meaning Sink meaning Sinkhole meaning Sinking meaning Sinking Agent meaning Sinter meaning Sinuous (Stream) meaning Sinuosity (Average) meaning Siphon, also Syphon meaning Siphon Tubes meaning Site meaning SI Units meaning Skerry meaning Skim meaning Skimming meaning Skin Diving meaning Skin Sample meaning Slack Tide meaning Slack Water meaning Slackwater Channel meaning Slake meaning Slaked Lime meaning Slash and Burn meaning Sleet meaning Slickensides meaning Slick Spots meaning Slimes meaning Slip meaning Slip-Off Slope Bank meaning Slipway meaning Slope meaning Slope Component meaning Slope-Discharge (Diagram) meaning Slope Protection meaning Slope Wash meaning Sloping Gage meaning Slosh meaning Slough meaning Sloughing (or Sloughing Off) meaning Slow Sand Filter meaning Sludge meaning Sludge Age meaning Sludge Bulking meaning Sludge Deposits meaning Sludge Digester meaning Sludge Digestion meaning Sludge Disposal meaning Sludge Volume Index (SVI) meaning Slue meaning Sluice meaning Sluice Gate meaning Sluiceway meaning Slump (Slumping) meaning Slurry meaning Slurry Wall meaning Slush meaning Small Stream Flooding meaning Snow meaning Snow Ablation meaning Snowcap meaning Snow, Cold Content of meaning Snow Course meaning Snow Crystal meaning Snow Density meaning Snow Depth meaning Snowdrift meaning Snowfall meaning Snow Field meaning Snowhedge meaning Snowflake meaning Snow Line meaning Snow Line, Temporary meaning Snow, Liquid Water Deficiency of meaning Snow, Liquid Water-Holding Capacity of meaning Snow Making meaning Snow Management meaning Snowmelt meaning Snowmelt Rate meaning Snow Metamorphism meaning Snowmold meaning Snowpack meaning Snowpack Telemetry (SNOTEL) meaning Snow Pellet meaning Snow Quality meaning Snow Sample meaning Snow Sampler meaning Snow Stake meaning Snow Survey meaning SNOTEL meaning Snow, Thermal Quality of meaning Snow, Water Equivalent of meaning Soak meaning Soakage meaning Soaker Hose meaning Socioeconomics meaning SOCs meaning Soda Ash meaning Sodic (Soils) meaning Sodicity (of Soils) meaning Sodium Adsorption Ratio (SAR) meaning Sodium Bicarbonate meaning Sodium Carbonate meaning Sodium Hypochlorite meaning Soft Detergents meaning Soft Hail meaning Soft Water meaning Softening meaning Soil meaning Soil Absorption Field meaning Soil Absorption System, Drip or Trickle meaning Soil Absorption System, Septic Tank meaning Soil Aggregates meaning Soil Air meaning Soil Amendment meaning Soil and Sediment Adsorption Isotherm Test meaning Soil and Water Conservation Practices meaning Soil Bioengineering meaning Soil Classification meaning Soil Conditioner meaning Soil Conservation meaning Soil Core meaning Soil Creep meaning Soil Erodibility meaning Soil Erosion meaning Soil Flushing meaning Soil Management meaning Soil-Moisture Depletion meaning Soil-Moisture Deficiency (or Deficit) meaning Soil Moisture Regime meaning Soil-Moisture Retention meaning Soil-Moisture Sensor meaning Soil Monolith meaning Soil Morphology meaning Soil Productivity meaning Soil Profile meaning Soil Sorption Coefficient (Kd) meaning Soil Taxonomy meaning Soil Texture meaning Soil Thin-Layer Chromatography meaning Soil Tilth meaning Soil Toxicity meaning Soil Vapor Survey meaning Soil Water meaning Soil Water Tension meaning Soil Zone meaning Solar Aquatic Systems (SAS) meaning Solar Pond meaning Solder meaning Solid meaning Solid Waste meaning Solifluction meaning Solubility meaning Solubilize meaning Soluble meaning Soluble Minerals meaning Soluble Reactive Phosphate (SRP) meaning Solum meaning Solute meaning Solute Transport meaning Solute Transport Model meaning Solution meaning Solution Channel meaning Solution Mining meaning Solvent meaning Solvent Recovery meaning Sonar meaning Sop meaning Sorption meaning Sound (Water) meaning Sounding meaning Sounding Line meaning Sour meaning Source Water Assessment Program (SWAP) meaning Source Water Protection meaning Source Water Protection Program (SWPP) meaning Souse meaning Southern Nevada Water Authority (SNWA) Nevada meaning Southern Nevada Water System (SNWS) Nevada meaning Spa meaning Sparkling Water meaning Spate meaning Spatter meaning Spawning meaning Special Assessment District meaning Special District meaning Special Flood Hazard Area (SFHA) meaning Species meaning Species Diversity meaning Species of Special Concern California meaning Specific Capacity (of a Well) meaning Specific Conductance meaning Specific Discharge (Specific Flux) meaning Specific Drawdown meaning Specific Energy meaning Specific Gravity (SG or SP GR) meaning Specific Heat (SP HT) meaning Specific Humidity meaning Specific Retention (of a Water-Table Aquifer) meaning Specific Storage meaning Specific Yield (of an Aquifer) meaning Specific Yield (Ground Water) meaning Specification meaning Spectroscopic Hygrometer meaning Spiles meaning Spill meaning Spill Prevention Control and Countermeasures Plan (SPCCP) meaning Spillway meaning Spit meaning Splash meaning Splashboard meaning Splashdown meaning Splat meaning Splatter meaning Spoil meaning Spongy meaning Sponson meaning Spout meaning Spray meaning Spray Chamber meaning Spray Field meaning Spray Irrigation meaning Spray Tower meaning Spray Tower Scrubber meaning Spread/Spreading meaning Spreading Basin meaning Spreading Grounds meaning Spring (Water) meaning Spring, Cold meaning Spring, Hot meaning Spring Melt/Thaw meaning Spring Overturn meaning Spring Runoff meaning Spring Tide meaning Sprinkle meaning Sprinkler Irrigation meaning Spritz meaning Spume meaning Stability meaning Stability Hazard meaning Stabilization meaning Stable Canal System meaning Stable Isotope Ratio meaning Staff Gage meaning Stage meaning Stage-Capacity Curve meaning Stage-Discharge Curve (Rating Curve) meaning Stage-Discharge Relationship meaning Stagnation meaning Stagnation Point meaning Stakeholders meaning Stalactite meaning Stalagmite meaning Stand meaning Stand Density Index (SDI) meaning Standard meaning Standard Deviation (ó) meaning Standard Methods meaning Standard Permeability meaning Standard Project Flood meaning Standard Sample meaning Standardized Precipitation Index (SPI) meaning Standards meaning Standing (Water) meaning Standing Crop meaning Standpipe meaning Stank meaning State Coordinating Agency meaning State Engineer meaning State Water Project (SWP) California meaning State Water Resources Control Board (SWRCB) California meaning State Wellhead Protection Program meaning Static (Fixed Water) meaning Static Head meaning Static Level (Ground Water) meaning Static Lift meaning Static Pressure meaning Static Water Depth meaning Static Water Level meaning Statistical Inference meaning Statistical Tests of Significance meaning Statistically Significant meaning Statistics meaning Statutory Law meaning Steady Flow meaning Steady State meaning Steady-State Conditions meaning Steady-State or Apparent Plateau meaning Steam meaning Stream Depletion meaning Steam, Dry meaning Steam Injection Well meaning Steam Stripping meaning Stemflow meaning Stenobathic meaning Stenohaline meaning Step Aeration meaning Sterile (Water) meaning Sterilization (of Water) meaning Stilling Basin meaning Stilling Well meaning Still Water meaning Stillwater National Wildlife Refuge (NWR) Nevada meaning Stillwater Wildlife Management Area Nevada meaning Stochastic Hydrology meaning Stochastic Process meaning Stockpond meaning Stock Resources Versus Flow Resources meaning Stoma meaning Stomates meaning Stone meaning Stopcock meaning Stoplogs meaning Storage meaning Storage Capacity, Active (Usable) meaning Storage Capacity, Conservation meaning Storage Capacity, Dead meaning Storage Capacity, Exclusive Flood Control meaning Storage Capacity, Inactive meaning Storage Capacity, Joint Use meaning Storage Capacity, Live meaning Storage Capacity, Sediment meaning Storage Capacity, Surcharge meaning Storage Capacity, Total meaning Storage Coefficient meaning Storage Ratio meaning Storage-Required Frequency Curve meaning Storage Reservoir meaning Storage Right meaning Storage, Specific (Ground Water) meaning Storage, Usable meaning Storativity meaning Storm meaning Storm, Design meaning Storm Loss meaning Storm Seepage meaning Storm Sewer meaning Storm Surge meaning Stormwater Drainage System meaning Stormwater Runoff meaning Stoss meaning Strait, also Straits meaning Strand meaning Strand Line, also Strandline meaning Strata meaning Stratification meaning Stratification meaning Stratified Random Sample meaning Stratigraphy meaning Stratocumulus meaning Stratopause meaning Stratosphere meaning Stratum meaning Stratus meaning Stream meaning Streambank Erosion meaning Streambank Erosion Control meaning Streambank Erosion Damage meaning Streambank Protection Works meaning Streambanks meaning Streambank Stabilization meaning Streambed meaning Streambed Erosion meaning Stream Capture meaning Stream Channel meaning Stream Clearance meaning Stream, Coldwater meaning Stream, Coolwater meaning Stream, Effluent meaning Stream, Ephemeral meaning Streamflow meaning Streamflow Depletion meaning Streamflow Regulation meaning Streamflow Routing meaning Stream Gaging meaning Stream-Gaging Station meaning Stream Gradient meaning Stream, Influent meaning Stream, Intermittent meaning Streamlet meaning Streamline (Flowline) meaning Stream Load meaning Stream Order meaning Stream, Perennial meaning Stream Piracy meaning Stream Power meaning Stream Reach meaning Stream Segment meaning Streamside Management Zone (SMZ) meaning Stream Terrace meaning Stream, Underground meaning Stream, Warmwater meaning Streeter-Phelps Equation meaning Stress meaning Stressed Waters meaning Striation meaning Stringer meaning Strip Cropping meaning Strip Mining meaning Stripping meaning Structural Deformation meaning Structural Floodplain Management Measures meaning Structural Measures meaning Stubble Mulching meaning Subaqueous meaning Sub-Basin meaning Subclimax meaning Subduction Zone meaning Subglacial meaning Subhumid Climate meaning Subirrigation (Subirrigate) meaning Subirrigated Land meaning Sublimation meaning Sublittoral meaning Sublittoral Zone meaning Submarine meaning Submeander meaning Submerge meaning Submerged Aquatic Vegetation meaning Submerged Plants meaning Submergence meaning Submergent Plant meaning Submergible meaning Submersed meaning Submersible meaning Subsequent Stream meaning Subsidence meaning Subsoil meaning Substrate meaning Substrate, Artificial meaning Substrate, Natural meaning Subsurface meaning Subsurface Drainage meaning Subsurface Drainage System meaning Subsurface Drains meaning Subsurface Flow meaning Subsurface Flow (SF) Constructed Wetland meaning Subsurface Irrigation System meaning Subsurface Runoff meaning Subsurface Seepage meaning Subsurface Water meaning Subterranean Water meaning Subterranean Water (Legal) meaning Subwatershed meaning Succession meaning Succulent meaning Suction Lift meaning Suction Lysimeter meaning Suction Pump meaning Suitability meaning Sulfur Dioxide (SO2) meaning Sullage meaning Summer Kill meaning Summit meaning Sump meaning Sump Pump meaning Sunbow meaning Sunspot Activity meaning Superchlorination meaning Supercool meaning Supercooled Water meaning Supercritical Water meaning (Hazardous Substances) Superfund meaning Superfund Law meaning Superfund List meaning Superfund Site meaning Superheated Water meaning Superimposed Stream meaning Supernatant meaning Supersaturate meaning Supplemental Irrigation meaning Supplemental Sources meaning Supplier of Water meaning Supply Augmentation Alternatives meaning Surface Area (Lake or Impoundment) meaning Surface Casing meaning Surface Collecting Agents meaning Surface Compaction meaning Surface Detention meaning Surface Impoundment meaning Surface Irrigation meaning Surface Mining meaning Surface Mining Control and Reclamation Act meaning Surface Runoff meaning Surface Supply (of Water) meaning Surface Tension meaning Surface Water meaning Surface Water Disposal meaning Surface Water Supply Index (SWSI) (Drought Index) meaning Surface Water Treatment Rule (SWTR) meaning Surface Water Withdrawals meaning Surfactant meaning Surficial Bed Material meaning Surge meaning Surge Wave meaning Surplus Water meaning Suspended meaning Suspended Load meaning Suspended Particulate Matter meaning Suspended, Recoverable meaning Suspended Sediment meaning Suspended-Sediment Concentration meaning Suspended-Sediment Discharge meaning Suspended Solids (SS) meaning Suspended, Total meaning Suspended Water meaning Suspension meaning Suspensoids meaning Sustainability meaning Sustainable Development meaning Sustainable Management meaning Sustained Yield meaning Swale meaning Swamp meaning Swash meaning Swash Marks meaning Sweet (Water) meaning Swell meaning Swill meaning Swim (Swimming) meaning Synecology meaning Synoptic Studies meaning Synthetic Organic Chemicals (SOCs) meaning Synthetic Seawater meaning System Design Capacity meaning System Head Curve meaning System with a Single Service Connection meaning Systemic meaning Tacking meaning Tafoni meaning Tahoe–Prosser Exchange Agreement California-Nevada meaning Taiga meaning Tailings meaning Tailrace meaning Tail Water meaning Tailwater Recovery meaning Tailwater Runoff meaning Tank meaning Tap meaning Tapered Aeration meaning Tap Water meaning Taproot meaning Tar Balls meaning Tarn meaning Taxonomy meaning TCID meaning TDS (Total Dissolved Solids) meaning Technology-Based meaning Technology-Based Limitations meaning Technology-Based Standards meaning Technology-Forcing meaning Teleconnection meaning Temperate (Deciduous) Forest meaning Temperature meaning Temperature Gradient meaning Temperature Inversion meaning Temperature Regulation meaning Temperature Scale meaning Tempest meaning Temporary Hardness meaning Temporary Transfer meaning Temporary Wetland meaning Tenaja meaning Tensiometer meaning Tennessee Valley Authority (TVA) meaning Tephra meaning Teratogenic meaning Terminal Lake meaning Terminal Moraine meaning Terminal Spill meaning Terminal Velocity meaning Terminal (Settling) Velocity meaning Terminus meaning Terrace meaning Terracing meaning Terraqueous meaning Terrestrial meaning Terrigenous meaning Territorial Waters meaning Tertiary Wastewater Treatment meaning Test Hole (Test-Well) meaning (Local) Test-Well Site Designation Nevada meaning Test-Well Site Identification (U.S. Geological Survey) meaning Tetrachloroethylene (Perchloroethylene, PCE) meaning Texture meaning Thalweg meaning Thank-You-Ma'am meaning Thatch meaning Thaw meaning Theoretical Oxygen Demand (ThOD) meaning Thermal meaning Thermal Gradient meaning Thermal Mass meaning Thermal Plant meaning Thermal Plume meaning Thermal Pollution meaning Thermal Spring meaning Thermal Stratification meaning Thermocline meaning Thermoelectric Power meaning Thermoelectric Power Water Use meaning Thickener meaning Thiokol meaning Third Party (Parties) meaning Third-Party Impacts meaning Threatened Species meaning Three-Mile Limit meaning Threshold Odor Number (TON) meaning Threshold Pollutant meaning Throughfall meaning Thunder meaning Thunderbird meaning Thundercloud meaning Thunderhead meaning Thundershower meaning Tidal Marsh meaning Tidal Energy meaning Tidal Flat meaning Tidal Marsh meaning Tidal Power meaning Tidal Volume meaning Tidal Wave meaning Tide Cycle meaning Tide Gate meaning Tideland meaning Tideland (or Tidal) Flooding meaning Tidemark meaning Tide Pool meaning Tides meaning Tidewater meaning Tile Drainage meaning Till (Glacial) meaning Tillage meaning Tilth meaning Tilting Gate meaning Time-Domain Electromagnetics (TDEM) meaning Time of Concentration meaning Time of Travel (TOT) meaning Time-Series Analysis meaning Time-Weighted Average meaning Title meaning Titrant meaning Titration meaning Titrator meaning Toe meaning Toe Drain and Outfall meaning Toe Wall meaning Toeslope meaning Toilet meaning Toilet Water meaning Tonnage meaning Tons per Acre-Foot meaning Tons per Day meaning Top of Bank meaning Top of Dam meaning Topographic Apex meaning Topographic Maps meaning Topography meaning Topside meaning Tornado meaning Torrent meaning Total Carbon (TC) meaning Total Coliform meaning Total Coliform Bacteria meaning Total Constituent meaning Total Discharge meaning Total Dissolved Solids (TDS) meaning Total Hardness meaning Total Head meaning Total in Bottom Material meaning Total Inorganic Carbon (TIC) meaning Total Inorganic Nitrogen (TIN) meaning Total Inorganic Phosphate (TIP) meaning Total Kjeldahl Nitrogen (TKN) meaning Total Load meaning Total Organic Carbon (TOC) meaning Total Recoverable Constituent meaning Total Sediment Discharge meaning Total Sediment Load meaning Total Soil Water Potential meaning Total Solids (TS) meaning Total Storage (Reservoir) meaning Total Suspended Particles meaning Total Suspended Solids (TSS) meaning Total Toxicity meaning Total Trihalomethanes (TTHMs) meaning Total Water Used meaning Totalizing Meters meaning Township meaning Township Line meaning Toxaphene meaning Toxemia meaning Toxicant meaning Toxicity meaning Toxicity Characteristic Leaching Procedure (TCLP) meaning Toxic Materials meaning Toxicology meaning Toxic Salt Reduction meaning Toxin meaning Trace meaning Trace Elements meaning Trace Metals meaning Tract meaning Tractive Force meaning Tragedy of the Commons meaning Transbasin meaning Transfer meaning Transfer (Water Right) meaning Transfer Rate meaning Transfer or Change in Use (Water Right) meaning Transient Flow meaning Transient Water System meaning Transition Zone meaning Transitional Storage Reserve meaning Translatory Wave meaning Transmissibility (Ground Water) meaning Transmission Lines meaning Transmissivity, also Coefficient of Transmissivity (ô) meaning Transparency meaning Transpiration meaning Transpiration Ratio meaning Transport meaning Transport Capacity meaning Trap meaning Trap Efficiency (of Reservoirs) meaning Trash Rack meaning Tray Tower meaning Treated (Wastewater) Effluent meaning Treatment meaning Treatment Facility meaning Treatment Plant meaning Treatment Tank meaning Tree meaning Tree Line meaning Trellis Pattern meaning Tremie meaning Trend meaning Trespass meaning Tributary meaning Trickle meaning Trickle Channel meaning Trickle (Drip) Soil Absorption System meaning Trickle Tube meaning Trickling Filter meaning Trihalomethanes (THMs) meaning Tri-Partite Agreement Lahontan Valley, Nevada meaning Triphibian meaning Triple Point meaning Trompe meaning (Mean) Trophic State Index (TSI) meaning Trophogenic Region meaning Tropical Dry Forest meaning Tropopause meaning Troposphere meaning Trough meaning Troy Weight meaning TRPA meaning Truckee–Carson Irrigation District (TCID) Nevada meaning Truckee–Carson Irrigation Project Nevada meaning Truckee Division Newlands Irrigation Project, Nevada meaning Truckee Storage Project Nevada meaning Tsunami meaning Tube Settler meaning Tuberculation (Tubercules) meaning Tufa meaning Tuffs meaning Tundra meaning Turbellarian meaning Turbid meaning Turbidimeter meaning Turbidity meaning Turbidity Current meaning Turbine meaning Turbulence meaning Turbulent Flow meaning Turning Basin meaning Turnout meaning Turnover, Fall meaning Turnover, Spring meaning Typhoid Fever meaning Typhoon meaning Ubiquitous Hydrophytes meaning Ubiquitous Organisms meaning UDI meaning Udometer meaning Ultrafiltration meaning Ultraviolet Radiation (UV) meaning Unbiased Sample meaning Unconfined meaning Unconfined Aquifer meaning Unconsolidated Deposits (Sediment) meaning Unconsolidated Formation meaning Undercurrent meaning Underflow meaning Underdrain meaning Underground Injection Control (UIC) meaning Underground Source of Drinking Water (USDW) meaning Underground Storage Tank meaning Underground Water meaning Understory meaning Unimpaired Flow meaning Unit Density meaning United States Army Corps of Engineers (COE) meaning United States Bureau of Indian Affairs (BIA) meaning United States Bureau of Land Management (BLM) meaning United States Bureau of Reclamation (USBR) meaning United States Department of the Interior (USDI) meaning United States Environmental Protection Agency (EPA) meaning United States Fish and Wildlife Service (USFWS) meaning United States Forest Service (USFS) meaning United States Geological Survey (USGS) meaning United States Natural Resources Conservation Service (NRCS) meaning United States Soil Conservation Service (SCS) meaning Unit Hydrograph meaning Unit Period meaning Unit Storm meaning Unmeasured Sediment Discharge meaning Unravel meaning Unsaturated Flow meaning Unsaturated Zone meaning Unsteady Flow meaning Upgradient Well meaning Uplands meaning Uplift meaning Upper Basin States Colorado River Basin meaning Upstream meaning Upstream Blanket meaning Upstream Control meaning Upstream Slope (of a Dam) meaning Uptime meaning Upwelling meaning Urban Equilibrium (of a Channel) meaning Urban Flooding meaning Urban Runoff meaning Urban Water Use meaning Usable Storage Capacity meaning Use (Water) meaning USGS meaning USGS (Test-Well) Site Identification meaning U-Shaped Valleys meaning Usufruct, also Usufructuary meaning Usufructuary (Water) Right meaning Utility Water Use meaning Vacuum Drying meaning Vacuum Filtration meaning Vadose meaning Vadose Zone meaning Vadose Water meaning Vale meaning Valley meaning Valley Fill meaning Valve meaning Vapor meaning Vapor Barrier meaning Vapor Blanket meaning Vapor Flow meaning Vaporization meaning Vapor Plumes meaning Vapor Pressure meaning Vapor Trail meaning Variable meaning Variable Source Area meaning Varve meaning Vascular Plant meaning Vegetation Management meaning Vegetative Controls meaning Velocimeter meaning Velocity, Average Interstitial meaning Velocity Head meaning Velocity (of Water in a Stream) meaning Vena Contracta meaning Vent meaning Venturi meaning Venturi Effect meaning Venturi Flume meaning Venturi Meter meaning Venturi Scrubbers meaning Venturi Tube meaning Verglas meaning Vernal Pools meaning Vertical Separation Distance meaning Vertical-Velocity Curve meaning Vessel meaning Vested Water Right meaning Vibrio Comma meaning Vicariance meaning Vichy Water meaning Virgin Flow meaning Virus meaning Viscosity meaning Visibility meaning Visual Resource meaning Visual Resource Management (VRM) meaning VOC meaning VOCs meaning Void meaning Void Ratio meaning Voids meaning Volatile meaning Volatile Organic Carbon (VOC) meaning Volatile Organic Chemicals (VOCs) meaning Volatile Organic Compounds (VOCs) meaning Volatile Solids meaning Volcanic Rock Aquifer meaning Volcanic Water meaning Volumetric Flow Rate meaning Volumetric Tank Test meaning Volumetric Water Content meaning Vortex meaning Vortex Rocks meaning V-Shaped Valleys meaning Wade meaning Wadi, also Wady meaning Waft meaning Wake meaning Walker River Irrigation District (WRID) Nevada meaning Wallow meaning Warm Front meaning Warm Spring meaning Warning Stage meaning Wash meaning Wash Load meaning Washoe Project Nevada meaning Washoff meaning Washout meaning Wasteload Allocation (WLA) meaning Waste Pipe meaning Waste Treatment Lagoon meaning Waste Treatment Plant meaning Wastewater meaning Wastewater Infrastructure meaning Wastewater Operations and Maintenance meaning Wastewater Reclamation meaning Wastewater Treatment meaning Wastewater Treatment Plant meaning Wasteway meaning Waste Utilization meaning Water (H2O) meaning Water meaning Water Administration meaning Water Alliances For Voluntary Efficiency (WAVE) meaning Water Allocation meaning Water Analysis meaning Water Application Efficiency meaning Water Audit meaning Water Balance meaning Water Ballet meaning Water Bank meaning Water Banking meaning Water-Based Recreation meaning Water Bloom meaning Waterborne meaning Waterborne Disease Outbreak meaning Water, Bottled meaning Water Budget meaning Water Classification meaning Water Clock meaning Water Color meaning Water Column meaning Water Commissioner meaning Water Commitment meaning Water Conservation meaning Water Conserving Irrigation System meaning Water Consumed meaning Water Contamination meaning Water Content of Snow meaning Water Control meaning Water-Cooled Reactor meaning Watercourse meaning Watercourse Bed meaning Watercraft meaning Water Crossing meaning Water Cushion meaning Water Cycle meaning Water Dating meaning Water Dedications meaning Water Delivery System meaning Water Demand meaning Water Demand Schedule meaning Water Desalination meaning Water Dilution Volume (WDV) meaning Water Disposal System meaning Water Duty meaning Water Duty Nevada meaning Water Education For Teachers (Project WET) Nevada meaning Water Equivalent (of Snow) meaning Waterer meaning Water Exports meaning Waterfall meaning Waterflood meaning Water Flow meaning Waterfront meaning Water Gap meaning Water Garden meaning Water Gate meaning Water Gauge meaning Water Glass meaning Water Hole meaning Water Ice meaning Water Importation meaning Water Imports meaning Water Impoundment meaning Watering Place meaning Watering Point meaning Waterish meaning Water Jacket meaning Water Law meaning Water Law California meaning Water Law Federal meaning Water Law Nevada meaning Waterless meaning Water Level meaning Water-Level Gage meaning Water Level Pivot Point meaning Water Line meaning Waterlog, also Waterlogged, Waterlogging meaning Water Loss meaning Water Losses meaning Water Main meaning Waterman meaning Water Management meaning Watermark meaning Water Marketing meaning Water Mass meaning Watermaster meaning Watermaster-Reported Headgate Deliveries meaning Water Meter meaning Water Mill meaning Water Molecule meaning Water of Crystallization meaning Water of Hydration meaning Water Penetration meaning Water Permit meaning Water Pipe meaning Water Plan meaning Water Planning meaning Water Policy meaning Water Pollution meaning Water Polo meaning Water Potential meaning Waterpower meaning Water Privilege meaning Waterproof meaning Water Purification meaning Water Purveyor meaning Water Quality meaning Water Quality-Based Limitations meaning Water Quality-Based Permit meaning Water Quality Criteria meaning Water Quality Indicators meaning Water Quality Limited Segment meaning Water Quality Management meaning Water Quality Standard (Defined) Nevada meaning Water Quality Standards meaning Water Ranching meaning Water Reactive meaning Water Reclamation meaning Water Recycling meaning Water-Related Disaster meaning Water-Related Disease meaning Water-Related Issue meaning Water-Related Land meaning Water-Related Organizations meaning Water-Related Recreation Activity meaning Water-Repellent meaning Water Requirement meaning Water Requirement (Agriculture) meaning Water Reservation meaning Water-Resistant meaning Water Resource(s) meaning Water Resource District meaning Water Resource Management meaning Water Resource Plan meaning Water Resource Region meaning Water Resource Subregion meaning Water Resources Regions United States meaning Water Resources Sub-Region United States meaning Water Resources Sub-Area meaning Water Right meaning Water-Righted Acreage meaning Water Rights meaning Water Rights, Correlative Doctrine meaning Water Sample meaning Water Service Agency meaning Water Service Reliability meaning Watershed Area (Drainage Area) meaning Watershed Lag meaning Watershed Management meaning Watershed Planning meaning Watershed Project meaning Watershed Protection meaning Water-Sick meaning Waterside meaning Water Softening meaning Water Solubility meaning Water Soluble meaning Waterspout meaning Water Spreading meaning Water Spreading Methods meaning Waterstop meaning Water Storage Pond meaning Water Supplier meaning Water Supply meaning Water Supply System meaning Water Surface Elevation meaning Water System meaning Water Table meaning Water-Table Aquifer meaning Water Table, Perched meaning Watertight meaning Water Tower meaning Water Treatment meaning Water Treatment, Combined Technique meaning Water Treatment Lagoon meaning Water Treatment Plants meaning Water Use meaning Water Use Efficiency meaning Water Use Practices meaning Water Use, Types meaning Water Vapor meaning Waterwall Incinerator meaning Water Wave meaning Waterway meaning Water Well meaning Water Well Report (Permitting) meaning Water Wheel meaning Water Wings meaning Water Witch meaning Water Withdrawal meaning Waters of the State (Defined) Nevada meaning Waterworn meaning Waterworks meaning Watery meaning Water Year meaning Water Yield meaning Watt meaning Watt-Hour (Wh) meaning Wave meaning Wave Attack meaning Wave Celerity meaning Wave Cut Platform meaning Wave Machine meaning Wave Periods meaning Weather meaning Weathering meaning Weather Modification meaning Wedge Storage meaning Weeper meaning Weeping meaning Weighted Average meaning Weir meaning Weir Basin meaning Weir Box meaning Weir Loading Rate meaning Weir Notch meaning Well (Water) meaning Well Capacity (or Potential Yield) meaning Well Development meaning Well Drillers meaning Well Field meaning Well, Fully Penetrating meaning Well Function meaning Wellhead meaning Wellhead Protection Area (WHPA) meaning Wellhead Protection (Program) meaning Well Injection meaning Well Interference meaning Well Logs meaning Well Monitoring meaning Well Plug meaning Well Rig meaning Well Screen meaning Wellspring meaning Well Stimulation meaning Well Yield meaning Westside (USBR) meaning Wet meaning Wet Adiabatic Lapse Rate meaning Wet Cooling meaning Wet Deposition meaning Wet Digestion meaning Wet Floodproofing meaning Wetland meaning Wetland Banking meaning Wetland Clumping (Aggregation) meaning Wetland Mitigation meaning Wetland Mitigation Bank meaning Wetlander meaning Wetlands, also Wetland (General) meaning Wetlands (COE and EPA) meaning Wetlands (NRCS) meaning Wetlands (USFWS) meaning Wetlands California meaning Wetlands Nevada meaning Wetlands, Benefits meaning Wetlands, Constructed meaning Wetlands, Jurisdictional meaning Wetlands Management meaning Wetlands, Palustrine meaning Wetlands, Seasonal meaning Wet Line meaning Wet Mass meaning Wet Meadow meaning Wet Milling meaning WET, Nevada Project meaning Wet Pack meaning Wet Scrubber meaning Wet Scrubbing meaning Wet Suit meaning Wetted Perimeter meaning Wetting Agent meaning Wet Weight meaning Wheeling meaning (Water) Wheeling Colorado River Basin meaning Whelm meaning Whirlpool meaning (Lake) Whitening meaning Whiteout meaning White Squall meaning White Water meaning Wicket meaning Wild and Scenic Rivers (Act) meaning Wild Rivers meaning Wilderness meaning Wilderness Act meaning Wilderness Area meaning (The) Wilderness Society meaning Wilderness Study Area (WSA) meaning Wilderness Values meaning Wildland meaning Wildlife Refuge meaning (National) Wildlife Refuge (NWR) System meaning Wilting Point meaning Wilting Point, Ultimate meaning Wimple meaning Wind meaning Wind Scale meaning Windows of Access meaning Windstorm meaning Wingdam meaning Wing Wall meaning Winter Irrigation meaning Winter Kill meaning Winter Range meaning Winters Doctrine meaning Winters Rights (Decision) meaning Wire-to-Water Efficiency meaning Witch meaning Withdrawal, Water meaning Withdrawal Use meaning Woodland meaning Woodland Management meaning Woody Debris meaning Woody Plant meaning Worst Drought of Record meaning WRID meaning Wringer meaning Xenobiota meaning Xeric meaning