- U.S. Fish and Wildlife Service (FWS) or National Marine Fisheries Service (NMFS) opinion that an action is likely to jeopardize the continued existence of a listed species or result in the destruction or adverse modification of critical habitat. The opinion includes reasonable and prudent alternatives, if any. See no jeopardy opinion.
- Browse Related Terms: Biological Opinion (BO), Essential Fish Habitat (EFH), Fish & Wildlife Service (FWS), Fishery Management Councils, Fishery Management Zone, Habitat Areas of Particular Concern (HAPC), Hazardous Waste Indicators, Jeopardy opinion, Magnuson-Stevens Fishery Conservation and Management Act, No jeopardy opinion, Sensitive species
- A gate consisting of a wheel-mounted leaf moved vertically by a motor-driven screw hoist. High pressure gate resembling a ring follower gate in general configuration, but designed for regulating flow with minimal cavitation damage.
- Browse Related Terms: Annular, Bear-trap gate, Coaster gate, Gate, Goggle valve., High-pressure gate, Jet-flow gate, Paradox gate, Ring seal gate, Ring-follower gate, Tractor gate
- A method of compacting soil using a hose or other device, with a high velocity stream of water, worked down through the depth of soil placed. Drilling with high pressure water or air jets.
- Browse Related Terms: compaction, Dumped, Jetting, Ponding (or flooding), Puddle, Puddling, Rolling, Saturation (and internal vibration), Shrinkage, Sluicing, Subgrade, Surface vibration, Tamp, Tamper, Tamping, Tamping roller, Undisturbed sample, Unified Soil Classification System
- A water pump that develops very high discharge pressure.
- Browse Related Terms: Afterbay (tailrace), Area of Influence, Area of influence of a well, Brake horsepower, Centrifugal pump, Deep well, Entrainment, Equilibrium Drawdown, Flowing Artesian Well, Ground Water Mining, Ground water mining (overdraft), Hydraulic efficiency, impeller, Jetting pump, Multi-stage pump, Overdraft, Pump, Pump-back system, Pumping energy, Pumplift (pumping lift), Single-stage pump, Total dynamic head (TDH), Water delivery system, Wire-to-water efficiency (overall efficiency)
A structure (e.g.; a pier, or mole of wood or stone) extending into a sea, lake, or river to influence the current or tide or to protect a harbor.
- Pier or other structure built out into a body of water to influence the current or tide, or to protect a harbor or shoreline. A long fill or structure extending into water from the shore, that serves to change the direction or velocity of water flow.
- Browse Related Terms: Anisotropy, Backflow, Divert, Energy grade line (EGL) (energy line, energy gradient), Equi-Potential Line, Flood Profile, Hydraulic grade line (HGL) (Hydraulic gradient), Hydraulic Permeability, Jetty, Seepage velocity, Splitter wall, strain, Transformed flow net, Unit hydrograph
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- A study of a job or activity to identify hazards or potential accidents associated with each step or task, and develop solutions that will eliminate, nullify, or prevent such hazards or accidents.
- Browse Related Terms: Annualized loss of life, APE, Decomposition, Effective peak ground acceleration, Esthetics, Failure potential assessment, Hazardous materials, Intangible Flood Damage, Job hazard analysis (JHA), Random earthquake, Risk, Uncertainty, Velocity Zones
- The frequent starting and stopping of an electric motor.
- Browse Related Terms: Brownout, Distribution line, Ensign valve, Jogging, power factor, Thermal sand, transducer, Transmission line
- See expansion joint, cold joint, construction joint, contraction joint, and control joint.
- Browse Related Terms: Aberrant, Control house., Dome, Hydraulic height, Instrumentation, Joint, Longitudinal, Streambed at the dam axis, Transverse
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- A single location where public information officials gather to collaborate on, and coordinate the release of, emergency public information.
- Browse Related Terms: Emergency broadcast system, Emergency operations center, Emergency reserve fund, Federal Advisory Committee Act, Institutionalized populations, Joint information center, Mass care center, Microhabitat, National disaster medical system, Public affairs officer, Public information officer (public relations officer), Regulatory Floodway, Special populations
- The reservoir capacity assigned to flood control purposes during certain periods of the year and to conservation purposes during other periods of the year.
- Browse Related Terms: appropriation, BASIC, Domestic water use (residential water use), Flood control pool (flood pool), Joint use capacity, Marine Reserve, No-Take Zones, Reservoir capacity allocations (RCA) sheet, Tillage, Winters Doctrine
An Icelandic term meaning glacier dammed lake outburst flood.
- Browse Related Terms: Breach, Breach hydrograph, Dam failure hydrograph, Design water level, Flood boundary, Inundation Area, Inundation map, Jokulhlaup, Stoping, Travel Time
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- A measure of energy, work or quantity of heat. One joule is the work done when a force of one newton is displaced a distance of one meter in the direction of force.
- Browse Related Terms: Amperage, British thermal units (Btu), Current Meter, Distribution efficiency, Gallon, Hydrometer, Inch-Degrees, Joule, Mil, Nephelometric, Paleoflood hydrology, Permeameter, Pitot Tube, Planimeter, River Gage, River mile (RM), Secchi depth, Seismic intensity, Totalizer (integrator), Vernier
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- Boundary of authorization for a State, county, and/or city emergency management agency. A term used to describe the level of management responsibility an entity has for a specific area using its rules and regulations.
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- Young fish older than 1 year but not capable of reproduction.
- Browse Related Terms: AFRP, Alevin, Anadromous, Angler-day, Cold-water fishery, Fish weir, Forage fish, Hatchery, ichthyology, Juvenile, Nonconsumptive water uses, Rough fish, Salmonids, Spawn, Warm-water fishery, Wetlands, Wildlife Refuge, Young-of-year
- All early lifestages of downstream migrating salmon (fry through smolt).
- Browse Related Terms: Abutment, Adit, Crest Length, Gallery, Groin, Juvenile salmon, Left Abutment, Right Abutment, Seep, Upstream blanket, Volume of Concrete, Volume of dam
Water formed chemically within the earth and brought to the surface in intrusive rock.
- Browse Related Terms: Aeration Zone, Cartography, Colluvium, Common material, Crib dam, Epicenter, Existing ground, Furrow, Geomorphic, Glacial moraine, Hydrogeologic cycle, Juvenile Water, map, Original ground (surface), Seismotectonic, Striation, Subgrade surface
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