Saturated Zone

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5 Terms

1
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darcy’s law

describes water flow though porous medium

2
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hydraulic head

saturated flow can be measured as height above arbitrary datum to which water rises in a piezometer.

3
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limitations of Darcy’s Law

not apply to flows ar scales smaller than REV

linear relationship between flow rate and hydraulic head gradient is only valid for low flow velocity

4
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movement of saturated flow

along hydraulic gradient

5
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metric head

measure of soil moisture content

negative in unsaturated due to negative pressure