McElwee-Zenner Slug Test Solution for Confined Aquifers

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Butler (1998)

McElwee-Zenner Slug Test Solution for Confined Aquifers

Description

A mathematical solution by McElwee and Zenner (1998) is useful for determining the hydraulic conductivity of 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 for Windows provides visual and automatic methods for matching the McElwee-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-Zenner solution:

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

Solution Options

AQTESOLV for Windows provides the following options for the Butler-Zhan solution:

	partially penetrating wells
	hydraulic conductivity anisotropy

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.