A floating structure designed to retain ice.
- Browse Related Terms: Black Ice, Brackish Ice, Breakup date, Cirque, Columnar Ice, Corn Snow Ice, Cryology, Deformed Ice, Dendrites, Diffuse Ice, Drifting Ice, Fracturing, Glacial striations, Glacier Dammed Lake, Grounded ice, Hummocked Ice, Ice Boom, Ice Shove, Pancake Ice, Ridge Ice, Rotten Ice, Sleet
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A continuous ice cover of limited size extending from shore to shore like a bridge.
- Browse Related Terms: Agglomerate, Beginning of Freezup, Beginning of the Breakup, Border ice, Breakup Period, Channel Lead, Consolidated Ice Cover, Crack, Dry Crack, Duration of Ice Cover, Dynamic Ice, Fracture, Ice Bridge, Ice Push, Ice Twitch, Shore ice
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The gorge or opening left in a jam after it has broken.
- Browse Related Terms: Backsiphonage, Breakup Jam, Flocculation, Floe, Hanging (ice) dam, Hummock, Ice Gorge, Ridge
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A stationary accumulation that restricts or blocks streamflow.
- Browse Related Terms: Anchor block., Artificial drains, Baffle block (dentate), Dentate., Floodwall, Horst., Ice Jam, Levee (Dike), Precast dam, River trash wall, Secondary Embankment
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Compression of an ice cover particularly at the front of a moving section of ice cover.
- Browse Related Terms: Agglomerate, Beginning of Freezup, Beginning of the Breakup, Border ice, Breakup Period, Channel Lead, Consolidated Ice Cover, Crack, Dry Crack, Duration of Ice Cover, Dynamic Ice, Fracture, Ice Bridge, Ice Push, Ice Twitch, Shore ice
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Flow of ice in a river. An ice run may be light or heavy, and may consist of frazil, anchor, slush, or sheet ice.
- Browse Related Terms: Anchor Ice, Anchor Ice Dam, Brash Ice, Frazil Ice, Frazil Slush, Freezup jam, Frost heave, Hydrosphere, Ice Run, snow
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On-shore ice push caused by wind, and currents, changes in temperature, etcetera.
- Browse Related Terms: Black Ice, Brackish Ice, Breakup date, Cirque, Columnar Ice, Corn Snow Ice, Cryology, Deformed Ice, Dendrites, Diffuse Ice, Drifting Ice, Fracturing, Glacial striations, Glacier Dammed Lake, Grounded ice, Hummocked Ice, Ice Boom, Ice Shove, Pancake Ice, Ridge Ice, Rotten Ice, Sleet
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Downstream movement of a small section of an ice cover. Ice twitches occur suddenly and often appear successively.
- Browse Related Terms: Agglomerate, Beginning of Freezup, Beginning of the Breakup, Border ice, Breakup Period, Channel Lead, Consolidated Ice Cover, Crack, Dry Crack, Duration of Ice Cover, Dynamic Ice, Fracture, Ice Bridge, Ice Push, Ice Twitch, Shore ice
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- The scientific study of fish.
- 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
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- All > Recreation > Fishing
The Integrated Flood Observing and Warning System.
- Browse Related Terms: 24-hour warning point, ALERT Flood Warning System, Decision making, Detection, Early warning system feasibility, EWS, IFLOWS, Implementation process, Integrated early warning system, LFWS, Notification, Operations and Maintenance (O&M), Warning
- Rock formed by molten magma. Rock that forms from the solidification of molten rock or magma.
- Browse Related Terms: Igneous, Lava, Magma, Pyroclastic, Tuff, Volcanic rock, Weld
- The estimated loss associated with the risk. While loss may be measured in time, quality, money, control, understanding, etc, the primary effect can be evaluated in one dimension: failure of the project.
Terminal - If the event occurs, the project will fail. This is a show stopper event.
Significant - If the event occurs, the project may fail, or it may succeed, but with substantially lower value.
Moderate - If the event occurs, the project will probably succeed, but with substantially lower value.
Minor - If the event occurs, the project will succeed, but with chronic issues that may lower its value.
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- A rotary pump member using centrifugal force to discharge a fluid into outlet passages. A rotating set of vanes in a pump designed to pump or lift water. See centrifugal pump.
- 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)
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- Having a texture that does not permit water to move through quickly. Not easily penetrated. The property of a material or soil that does not allow, or allows only with great difficulty, the movement or passage of water.
Material that does not permit fluids to pass through it.
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The ability to repel water, or not let water infiltrate.
- Not permeable; not allowing liquid to pass through. Resistant to movement of water.
- Browse Related Terms: Aeration, Capillarity, Impermeable, Impervious, Impervious material, Infiltration, Leaching, Permeability, Permeable, Permeate, Pervious
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- See core.
- Browse Related Terms: Bituminous, Core wall, cutoff, Cutoff Wall, Diaphragm wall, Diaphragm., Foundation trench, Impervious core., Impervious zone., Membrane (diaphragm)
- Relatively waterproof soils. Clay, for example, since water will percolate through clay at about one millionth of the rate at which it will pass through gravel.
- Browse Related Terms: Aeration, Capillarity, Impermeable, Impervious, Impervious material, Infiltration, Leaching, Permeability, Permeable, Permeate, Pervious
- See core.
- Browse Related Terms: Bituminous, Core wall, cutoff, Cutoff Wall, Diaphragm wall, Diaphragm., Foundation trench, Impervious core., Impervious zone., Membrane (diaphragm)
- To collide or strike.
- Browse Related Terms: Anticline, Aquifer, Bedding plane, Dip, Flatirons, Impinge, Monocline, Seam, Strata (stratum), Stratigraphy, Subbase, Syncline, Thermal stratification, Unconformity
- Procurement, installation, and implementation of all the components of an Early Warning System; includes inspecting and exercising the system.
- Browse Related Terms: 24-hour warning point, ALERT Flood Warning System, Decision making, Detection, Early warning system feasibility, EWS, IFLOWS, Implementation process, Integrated early warning system, LFWS, Notification, Operations and Maintenance (O&M), Warning