exam3:part1
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Created by:
sweetz2025 on November 22, 2010
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9 terms
Terms | Definitions |
|---|---|
 how does karst topography form, and what type of bed rock is usually involved in this process? | widespread collapse of large undergroud cave networks, limestone is most ccommon |
| What are the six major reservoirs of water in the hydrologic cycle on earth? | Oceans glaciers, shallow groundwater, fresh lakes/ streams, salty lakes/streams atmosphere |
| approximately what percent of the earth's total water is accessible and usable by humans as drinking water? | 1% |
| Whar are the major problems with surface water and groundwater in tioga county? | Surfacewater- impermeable soils, steep slopes Groundwater- slow moving, poor quality water |
| approximately how much of the us water supply currently comes from the groundwater? | 50% |
| What two states have the highest ratio of ground water withdrawal compared to recharge? | TX and OK |
| What is the difference between a confined aquifer and an unconfined aquifer? | uconfined aquifer- open to surface flow confined aquifer- isolated from surface flow by some barrier |
| What are two reasons that could cause the level of the water table to drop in a region? | Pumping exceeds the rate of change |
| Darcy's law is used to determine the volume of grouwater flow based on what three factors? | permeability, vertical drop, flow distance |
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