Numerical Pumping Test Analysis in Unconfined Aquifers

by Kenneth Ralph Rushton, Reader; Dept. of Civ. Engrg., Univ. of Birmingham, Birmingham, United Kingdom,
Yiu-Keung Chan, Research Student; Dept. of Civ. Engrg., Univ. of Birmingham, Birmingham, United Kingdom,


Serial Information: Journal of the Irrigation and Drainage Division, 1977, Vol. 103, Issue 1, Pg. 1-12


Document Type: Journal Paper

Abstract: A numerical model is presented which describes the flow towards an abstraction well in an unconfined aquifer. At each radius the conditions within the aquifer are described in terms of only two drawdowns, the free surface and the average drawdown. This model allows the effects of vertical components of flow, variable saturated depth, water contained within the well, delayed yield, and other factors to be included in a single solution. Results from the numerical model are compared with alternative analytical solutions. Finally the technique is used to interpret two pumping tests in unconfined aquifers.

Subject Headings: Numerical models | Aquifers | Pumping tests | Drawdown (hydrology) | Numerical analysis | Free surfaces | Water flow

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