EPA On-line Tools for Site Assessment Calculation

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Ground Water Flow

The three dimensional ground water flow equation is given by

where q_x is the Darcy flux, h is the hydraulic head, K_x is the hydraulic conductivity in the x direction, and S_s is the storage coefficient for a confined aquifer. The Darcy flux is defined by

Various forms of Darcy's Law

where q_x is the Darcy flux in the x direction and i is the hydraulic gradient.

Three calculators address components of Darcy's law:

Gradient Calculators
Hydraulic Conductivity Unit Conversions
Darcy's Law

The subsequent pages show examples for the use of these calculators.

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Contact Jim Weaver to ask a technical question on this material.