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Cards In This Set
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Ground water
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Is the water that lies beneath the ground surface and fills pores in sediments, sedimentary rocks, and fractures in other rock types. large in volume and readily available
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Groundwater represents..
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Oonly .6% of the hydrosphere (glaciers 2.1%), accessed by wells, resupplied by slow infiltration of precipitation from recharge areas.
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Porosity
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The percentage of rock or sediment that consists of voids or openings, is a measurent of a rock's ability to hold water.
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(T/F) movement of ground water through pores and fractures is relatively slow.
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True
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Flow velocity depends upon...
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Permeability of the rock or sediment and the slope of the water table
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Permeability
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The capacity of a rock to transmit fluid through pores and fractures. in other words, measures the relative ease of water flow and indicates the degree to which openings in a rock interconnect.
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Porous
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A rock that hold much water. porosity decreases with depth
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Permeable
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A rock that allows water to flow easily through it
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Impermeable
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A rock that does not allow water to flow through it easily
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High porosity and permeability=s
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Well sorted sediments
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Low porosity and conductivity=
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Poorly sorted sediments cause by lithication
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Fractured rocks are..
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Porous and permeable
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The water table
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The upper surface zone of saturation. the water level at surface of most lakes and rivers corresponds to local water table.
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Saturated zone
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The subsurface zone in which all rock openings are filled with water
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Vadose zone
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The unsaturated region above the water table
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