# McElwee and Zenner Slug Test Solution for Confined Aquifers

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Additional Topics

A mathematical solution by McElwee and Zenner (1998) is useful for determining the hydraulic conductivity of **nonleaky confined** aquifers. The solution accounts for inertial effects in the well and oscillatory response. Analysis involves matching a type curve to water-level displacement data collected during a slug test.

AQTESOLV provides visual and automatic methods for matching the McElwee and Zenner 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 McElwee and Zenner slug test solution:

- aquifer has infinite areal extent
- aquifer is homogeneous and of uniform thickness
- aquifer potentiometric surface is initially horizontal
- control well is partially penetrating
- a volume of water, V, is injected or discharged instantaneously from the control well
- aquifer is nonleaky confined
- flow is quasi-steady-state

## Solution

Options

AQTESOLV provides the following options for the McElwee and Zenner slug test solution:

- partially penetrating wells
- hydraulic conductivity anisotropy

## Benchmark

## References

McElwee, C.D. and M. Zenner, 1998. A nonlinear model for analysis of slug-test data, Water Resources Research, vol. 34, no. 1, pp. 55-66.

McElwee, C.D., 2000. Implementation of a nonlinear model for analysis of slug tests, Kansas Geological Survey Computer Program Series 2000-01, Lawrence, Kansas.