# Hurst, Clark and Brauer Solution for Constant-Head Tests in Nonleaky Confined Aquifers

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A mathematical solution by Hurst, Clark and Brauer (1969) is useful for determining the hydraulic properties (transmissivity and storativity) of a **nonleaky confined** aquifer. Analysis involves matching the Hurst et al. solution to discharge data collected during a constant-head (constant-drawdown) test. The solution includes wellbore skin.

AQTESOLV provides visual and automatic methods for matching the Hurst, Clark and Brauer solution to constant-head 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 Hurst et al. solution for constant-head tests:

- aquifer has infinite areal extent
- aquifer is homogeneous, isotropic and of uniform thickness
- potentiometric surface is initially horizontal
- aquifer is nonleaky confined
- flow is unsteady
- wells are fully penetrating
- water is released instantaneously from storage with decline of hydraulic head

## Solution

Options

AQTESOLV provides the following options for the Hurst et al. constant-head test solution:

- recovery

## References

Hurst, W., J.D. Clark and E.B. Brauer, 1969. The skin effect in producing wells, Journal of Petroleum Technology, November 1969, pp. 1483-1489.