Unconfined Aquifer Well Design Equations Formulas Calculator

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

Solution:

coefficient of permeability (K)

HAS NOT BEEN CALCULATED

Other Units:

Change Equation
Select an equation 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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