# Barker and Black Slug Test Solution for Fractured Aquifers

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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 provides visual and automatic methods for matching the Barker and 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 and Black solution:

- aquifer has infinite areal extent
- aquifer is homogeneous, isotropic and of uniform thickness
- aquifer potentiometric surface is initially horizontal
- control well is fully penetrating
- a volume of water, V, is injected or discharged instantaneously from the control well
- flow to control 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.