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12 Cards in this Set
- Front
- Back
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Zone of Saturation
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Area underground where water fills all open spaces. Upper limit is the water table.
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Zone of Aeration
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Area underground where sediment is not saturated with water. Above the water table.
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Porosity
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Percent of the total volume of rock/ sediment that consists of pore spaces. (V void/V total) x 100 = porosity
not affected by size of sediment |
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Permeability
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A material's ability to let water seep through.
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Confined Aquifer
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Can be shallow or deep. Separated from surface by impermeable layer.
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Unconfined Aquifer
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Close to surface. Below permeable layer.
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Artesian well
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A well where the groundwater rises above the level of the confined aquifer. Opening is above recharge line.
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Flowing Artesian Well
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A well where the groundwater reaches the surface under its own pressure. Opening is the same as or lower than recharge line.
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Recharge
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When water goes into an aquifer, replacing water that has been removed.
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Spring
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When groundwater emerges naturally at the surface. Forms whenever the water table intersects the ground surface and when an aquitard blocks downward movement of groundwater.
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Non-point Contamination
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Causes of groundwater contamination that is from all over. Examples: salt, pesticides, bacteria, fertilizers.
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Point Contamination
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Causes of groundwater contamination that are from one place. Examples: sewage, dumps/landfills, industrial waste, gas stations/ underground tanks.
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