Barker-Black Slug Test Solution for Fractured Aquifers

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Barker-Black Slug Test Solution for Fractured Aquifers

Description

A mathematical solution by Barker and Black (1983) is useful for determining the hydraulic properties (transmissivity and storage coefficient of the fractures; hydraulic conductivity and specific storage of the matrix) of double-porosity fractured aquifers. Analysis involves matching a type curve solution to water-level displacement data collected during a slug test.

AQTESOLV for Windows provides visual and automatic methods for matching the Barker-Black solution to slug test data. This easy-to-use and intuitive software promotes rapid and accurate determination of aquifer properties.

Assumptions

The following assumptions apply to the use of the Barker-Black solution:

	aquifer has infinite areal extent
	aquifer is homogeneous, isotropic and of uniform thickness
	aquifer potentiometric surface is initially horizontal
	test well is fully penetrating
	a volume of water, V, is injected or discharged from the well instantaneously
	flow to test well is horizontal
	aquifer is fractured with double porosity and slab blocks
	flow is unsteady
	water is released instantaneously from storage with decline of hydraulic head

References

Barker, J.A. and J.H. Black, 1983. Slug tests in fissured aquifers, Water Resources Research, vol. 19, no. 6, pp. 1558-1564.