Murdoch Solution for Flow to an Interceptor Trench

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Murdoch Solution for Flow to an Interceptor Trench in Confined Aquifers

Description

A mathematical solution by Murdoch (1994) is useful for determining the hydraulic properties (hydraulic conductivity, specific storage, hydraulic conductivity anisotropy and trench length) of confined aquifers with pumping from an interceptor trench. Analysis involves matching the solution to water-level displacement data collected during a pumping test. The solution estimates hydraulic conductivity anisotropy in a horizontal (x-y) plane.

AQTESOLV for Windows provides visual and automatic methods for matching the Murdoch solution to pumping 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 Murdoch solution:

	aquifer has infinite areal extent
	aquifer has uniform thickness
	aquifer potentiometric surface is initially horizontal
	trench is fully penetrating
	flow is unsteady
	water is released instantaneously from storage with decline of hydraulic head

Solution Options

AQTESOLV for Windows provides the following options for the Murdoch solution:

	variable pumping rates
	multiple pumping wells
	multiple observation wells

References

Murdoch, L.C., 1994. Transient analyses of an interceptor trench, Water Resources Research, vol. 30, no. 11, pp. 3023-3031.