- A rubber seal used around stems of some valves to prevent water from leaking past.
- Browse Related Terms: Bonnet, Butterfly valve, Conifers, Fixed cone valve (Howell Bunger valve), Gate valve, Hollow-jet valve, Howell Bunger valve., Needle valve, O-ring, Petcock, Tube valve, Valve
- Loosely woven hemp rope that has been treated with oil or other waterproofing agent; it is used to caulk joints in a bell and spigot pipe and fittings.
- Browse Related Terms: Class (pipe and fittings), Hub, Oakum, Sewer tile, Spigot, Standpipe, Surge chamber
- A species that depends completely upon habitat along a body of water.
- Browse Related Terms: Breeding potential, Endangered species, Endangered species act (ESA), ESA, Exotic species, Extirpated species, Fishery, Indicator, Indigenous, Microclimate, Obligate riparian species, Relict, Threatened, Threatened species
- A hole used to observe the ground-water surface at atmospheric pressure within soil or rock.
A non-pumping well used for observing the elevation of the water table or piezometric surface.
- Browse Related Terms: Artesian Well, Creep, Earth pressure, Isochrome, Liquefaction, Observation well, Pascal (Pa), Phreatic surface, Swell pressure, Triaxial shear test
Also listed in:
- The Williams-Steiger Occupational Safety and Health Act of 1970 (OSHA) is a law designed to protect the health and safety of industrial workers and also the operators of water supply systems and treatment plants. OSHA also refers to the federal and state agencies which administer the OSHA regulations.
- Browse Related Terms: Advisory Council on Historic Preservation (ACHP), ALC #, Benchmark (BM), Executive Orders, FEMA, Forest Service (FS), Jurisdiction, List of National System MPAs, Management/Managing Agency or Authority, Marine Protected Areas (MPA) Inventory, National Institute for Occupational Safety and Health (NIOSH), Occupational Safety and Health Act of 1970 (OSHA), Primacy, Proratable water, Purveyor, Reportable quantities, U.S. Geological Survey (USGS), Water purveyor, Water transfers
- Electric energy supplied during periods of relatively low system demand.
- Browse Related Terms: biennial, Fuel replacement energy, Gigawatt-hour (GWh), Gross generation, Hydroelectric plant, Hydroelectric power, load, Nonpreference customer, Off-peak energy, On-peak energy, Plant-use electricity, Pumped-storage plant, Station use, Thermal-electric powerplant, Transmission, Wholesale transmission services
- Water withdrawn from surface or ground water sources for use at another place.
- Browse Related Terms: Aerial cover, ASTS, Conjunctive use, Consolidation grouting, Corduroy, Effluent Seepage, Frost line, Geohydrology, Ground Water Overdraft, Harrow, Hydrogeochemistry, Hydrogeologist, Hydrogeology, Initial Detention, Offstream uses, Peak ground acceleration (PGA), Sacramento Soil Moisture Accounting Model (SACSMA), Scrape, Seashore, Snow Depth, Sprinkler irrigation, Terrain, Usable storage capacity, Withdrawal, Yield
A reverse curve, shaped like an elongated letter S. The downstream faces of overflow dams are often made to this shape. (From the French word Ogive).
- Browse Related Terms: Crest (Top) of Dam, Crest elevation (crest of dam, top of dam, dam crest), Crest of Dam, Ogee, Wave wall.
- The shape of the concrete spillway crest that represents the lower profile of the undernappe of a jet of water flowing over a sharp-crested weir at a design depth.
- Browse Related Terms: Broad-crested weir, Crest, Crest length (length of dam), Length of dam., Ogee crest, Overflow spillway (ogee spillway), Side Channel Spillway, Sill, Siphon Spillway, Spillway, Suppressed weir, Top Thickness, Trapezoidal weir., Weir
The Office of Hydrology, located in Silver Springs, MD.
- Browse Related Terms: Budget Review Committee (BRC), E-7, Flood Damage Report, Hydrologic Operations Division (HOD), Hydrologic Systems Branch (HSB), Hydrological Research Laboratory (HRL), Hydrometeorological Information Center (HIC), National Operational Hydrologic Remote Sensing Center (NOHRSC), National Warning System (NAWAS), OH
Also listed in:
- The unit of electrical resistance to current flow. The resistance in a conductor in which one volt of potential difference produces a current of one ampere.
- Browse Related Terms: Ampere (amp), Kilovolt (kV), Kilovolt-ampere (kVA), Ohm, Substation capacity, Volt (V), Volt-ampere (VA), Watt
- Defined as oil of any kind or in any form including, but not limited to, petroleum, fuel oil, sludge, oil refuse, and oil mixed with wastes.
- Browse Related Terms: Breeding rate, Coastal Waters, District, Lagomorphs, Meander Belt, Oil, On-district storage, Population
Also listed in:
- All > Science > Weather > Climate Change
- A revolving fund for spill control efforts has been authorized in cases where the Federal government has taken over containment and cleanup operations. The fund is administered by the U.S. Coast Guard. Once the responsible party is determined, they are required to reimburse the fund for the oil removal costs.
- Browse Related Terms: Associated facility, Association of Boards of Certification (ABC), Beneficiary, Non-reimbursable, Oil spill contingency fund, Onsite Coordinator (OSC), Reimbursable, Reserved works, Transferred works, U.S. Bureau of Reclamation (USBR), Water user
- Reservoirs and lakes which are nutrient poor and contain little aquatic plant or animal life. See mesotrophic.
- Browse Related Terms: algae, Algal bloom, Ammonium, Aquatic algae, Dissolved oxygen (DO), eutrophic, Eutrophication, Flora, Forb, Giant salvinia (Salvinia molesta), Macrophytes, mesotrophic, Oligotrophic, Phytophagous, plankton
Also listed in:
- All > Recreation > Fishing
An Operations Manual Letter. These serve as updates to policy and procedure for the NWService Operations Manual (WSOM).
- Browse Related Terms: Dam tender, Earthwork, essential element, Gated spillway, Incident command system, Landfill, Logbook (operating log), Maintenance management system, OML, Posted operating instructions, Remote operation, Reservoir regulation (or operating) procedure, Review of Operation and Maintenance (RO&M), Standing Operating Procedures (SOP), Supervisory control
- Animal that eats both vegetable and animal substances.
- Browse Related Terms: Amphibian, AUM, behavior, Binomial, Biota, biotope, Candidate Species, Coral Reefs, Desertification, Ecosystem, Epifauna, Fauna, forage, Habitat, Herbivore, Invertebrates, Life cycle, Nutrients, Omnivore, Organic, organism, Point source, Quadrat, Range, Recruitment, Spawning beds, Species, substrate, Toxin, Trophic level, zooplankton
- Small water storage facilities located within the boundaries of an irrigation entity, including reregulating reservoirs, holding ponds, or other new storage methods that allow for efficient water use.
- Browse Related Terms: Breeding rate, Coastal Waters, District, Lagomorphs, Meander Belt, Oil, On-district storage, Population
- Activities (especially growing crops and applying irrigation water) that occur within the legal boundaries of private property.
- Browse Related Terms: Contour farming, Contour strip farming, Crop rotation, Cropping pattern, Intrusion, Irrigated acreage, On-farm, Sodic soil, Strip cropping, Taproot, Theory, Understory, Vegetative controls
- The ratio of the volume of water used for consumptive use and leaching requirements in cropped areas to the volume of water delivered to a farm (applied water).
- Browse Related Terms: Consumptive use, Crop irrigation requirement, Crop water requirement, Effective Precipitation (Rainfall), Farm loss (water), Gross crop value, Irrigated Area, Irrigation requirement, On-farm irrigation efficiency
- Electric energy supplied during periods of relatively high system demand.
- Browse Related Terms: biennial, Fuel replacement energy, Gigawatt-hour (GWh), Gross generation, Hydroelectric plant, Hydroelectric power, load, Nonpreference customer, Off-peak energy, On-peak energy, Plant-use electricity, Pumped-storage plant, Station use, Thermal-electric powerplant, Transmission, Wholesale transmission services
Also listed in: