Hantush Solution for Constant-Head Tests in Leaky Confined Aquifers
A mathematical solution by Hantush (1959) is useful for determining the hydraulic properties (transmissivity and storativity) of a leaky confined aquifer. Analysis involves matching the Hantush solution to discharge data collected during a constant-head (constant-drawdown) test.
AQTESOLV provides visual and automatic methods for matching the Hantush solution to constant-head test data. This easy-to-use and intuitive software promotes rapid and accurate determination of aquifer properties.
The following assumptions apply to the use of the Hantush 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 leaky confined
- flow is unsteady
- wells are fully penetrating
- water is released instantaneously from storage with decline of hydraulic head
- aquitards have infinite areal extent, uniform vertical hydraulic conductivity and uniform thickness
- aquitards are overlain or underlain by an infinite constant-head plane source
- aquitards are incompressible (no storage)
- flow in the aquitards is vertical
AQTESOLV provides the following options for the Hantush constant-drawdown test solution:
Hantush, M.S., 1959. Nonsteady flow to flow wells in leaky aquifers, Journal of Geophysical Research, vol. 64, no. 5, pp. 1043-1052.