Definitions for

**"Darcy's Law"**Groundwater movement equation developed by Henry Darcy in the mid-1800's.

A mathematical equation stating that a volume of water, passing through a specified area of material at a given time, depends on the material's permeability and hydraulic gradient.

(After H.P.G. Darcy, 1856) Concerns the laminar flow of water through porous media and states that the velocity of flow (v) in a saturated soil is equal to the product of the coefficient of permeability (k) and the hydraulic gradient (i). v = ki