# Unconfined Aquifer Well Design Calculator

Fluid Mechanics Hydraulics Hydrology

The following equation uses Darcy's equation with pumping occurring at the center of a cylinder. This equation can be utilized to determine the cone of depression and well drawdown in an unconfined aquifer.

Solving for permeability coefficient.

## Inputs:

flow rate (Q)
radius point 1 (r1)
radius point 2 (r2)
pressure head at point 1 (h1)
pressure head at point 2 (h2)

## Conversions:

flow rate (Q)
= 0
= 0
meter^3/day
radius point 1 (r1)
= 0
= 0
meter
radius point 2 (r2)
= 0
= 0
meter
pressure head at point 1 (h1)
= 0
= 0
meter
pressure head at point 2 (h2)
= 0
= 0
meter

## Solution:

coefficient of permeability (K)
= NOT CALCULATED

## Other Units:

Change Equation
Select to solve for a different unknown
 extraction flow rate permeability coefficient pressure head at point 1 pressure head at point 2 radius at point 1 radius at point 2

References - Books:
1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.

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By Jimmy Raymond

Contact: aj@ajdesigner.com