apparent trace.
- Browse Related Terms: A, Burden, Caldera (crater), Deflagration, Detonator, Fuse, Millisecond delay (short period delay), Spacing
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architectural and engineering.
- Browse Related Terms: A&E (A/E), ACER, ARAR, AS, Hydraulics, Pan evaporation
All American Canal.
- Browse Related Terms: AAC, ACGIH, AIPC, AIRFA, AISC, ANSI, ARWRI, ASCE, ASCII, ASSE, Avoirdupois weight, AWWA, Bureau of Indian Affairs (BIA), Safe Drinking Water Act (SDWA), Tribe, United States
average annual habitat units.
- Browse Related Terms: AAHU, Acre (ac), Barrel, Biological diversity, BTU, Community, Contract rate, Corps of Engineers., Decibel, Distribution (Hydro)Graph, population density
annual arithmetic mean.
- Browse Related Terms: AAM, AGM, Average, B/C, Capital investment, Index of Wetness
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- Browse Related Terms: AAR, ACR, Alkali-aggregate reaction (AAR), Alkali-carbonate reaction (ACR), Alkali-silica reaction (ASR), Alkali-silicate/silica reaction (ASSR), ASR, ASSR, DI, diatom, Pattern cracking
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Assembly Bill.
- Browse Related Terms: °C, AB, Additive effect, Celsius (C), (°C), EEO, Fahrenheit (F), Fly ash, Median, Medium-size water system, Mill, Nominal dollars
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- Browse Related Terms: ABC, ACWA, ag, BADA, Basin States, Crop subsidy, CWA, Nonterritorial communities
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Atypical, departing from the normal type or structure.
- Browse Related Terms: Aberrant, Control house., Dome, Hydraulic height, Instrumentation, Joint, Longitudinal, Streambed at the dam axis, Transverse
The absence of living organisms.
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The process by which ice and snow dissipate owing to melting and evaporation.
- Browse Related Terms: Ablation, Acidified, Aliquot, Erratic, Firn (Snow), Firn Line, Flooded Ice, glacier, Glacier (ice sheet), Metamorphic, Snow Accumulation and Ablation Model, Snow Core, Snow Water Equivalent, Snowmelt Flooding, Snowpack, Water Equivalent, Weighing-type Precipitation Gage
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Wearing away of surfaces by friction.
- Browse Related Terms: Abrasion, Albedo, Erode, Fountainhead, Isobath, MS connectors, Piezometric surface, Reflectivity, Surface Impoundment, Unconfined aquifer, Undercurrent, Wetland
The amount of a chemical that enters the body of an exposed organism.
- Browse Related Terms: absorbed dose, Absorption factor, Acclimation, Baseline profile, Biological magnification (biomagnification), Biotic potential, Biotic pyramid, Biotype, Carnivore, Coliform, Demersal, drift, environment, Food chain, herbicide, Inorganic, Pollutant, Primary production, remote sensing
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Water held mechanically in a soil or rock mass and having physical properties not substantially different from ordinary water at the same temperature and pressure. See adsorbed water.
- Browse Related Terms: Absorbed water, Adsorbed water, Anisotropic mass, Compressibility, Isotropic mass, Plasticity
Taking in of fluids or other substances through, or as if through, cells or tissues. The uptake of water or dissolved chemicals by a cell or an organism (as tree roots absorb dissolved nutrients in the soil). Should not be confused with adsorption.
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The fraction of a chemical making contact with an organism that is absorbed by the organism.
- Browse Related Terms: absorbed dose, Absorption factor, Acclimation, Baseline profile, Biological magnification (biomagnification), Biotic potential, Biotic pyramid, Biotype, Carnivore, Coliform, Demersal, drift, environment, Food chain, herbicide, Inorganic, Pollutant, Primary production, remote sensing
The part of a valley side (wall) against which a dam is constructed. An artificial abutment is sometimes constructed as a concrete gravity section, to take the thrust of an arch dam where there is no suitable natural abutment. Right and left abutments are those on respective sides of an observer looking downstream.
That part of the valley wall against which the dam is constructed. The part of a dam that contacts the riverbank. A structure that supports the ends of a dam or bridge. An artificial abutment is sometimes constructed, as a concrete gravity section, to take the thrust of an arch dam where there is no suitable natural abutment. Action or place of abutting; the part of a structure that is the terminal point or receives thrust or pressure. Defined in terms of left and right as looking away from the reservoir, looking downstream (i.e., left abutment, right abutment).
The part of a valley or canyon wall against which a dam is constructed. Right and left abutments are those on respective sides of an observer looking downstream.
- Browse Related Terms: Abutment, Adit, Crest Length, Gallery, Groin, Juvenile salmon, Left Abutment, Right Abutment, Seep, Upstream blanket, Volume of Concrete, Volume of dam
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Reservoir water that moves through seams or pores in the natural abutment material and exits as seepage.
- Browse Related Terms: Abutment Seepage, Angle of internal friction (angle of shear resistance), ASTM, Concentrated flow path, Conveyor, digitizer, Ductility, Factor of safety, Feather, Flail, Nominal size, Ply, Specific Yield, Vein, Water saturation, Windrow
- acre.
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