Darcy's law: seepage through soil

Set the head difference, flow path length, area and soil type to see the flow.

Works in metric or imperial units.

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Questions students ask

How is permeability measured?

Constant-head tests for sands and gravels, falling-head tests for silts and clays, or pumping tests in the field.

What formula does it use?

Q = kiA; i = Δh/L.

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