Interpretation of an Unconfined Groundwater Flow Experiment

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Abstract
A laboratory experiment is considered that was carried out by Higgins (1980) on a sand tank to study the problem of water table geometry during flow to an adjacent stream. The purpose of the analysis is to determine whether the effects of partial saturation and of compressibility are likely to be important in this type of problem. Through numerical simulations and other considerations, it is concluded that compressibility alone, however large, cannot reproduce these experimental results. The results can only be simulated if proper account is taken of the partly saturated flow above the water table. Compressibility effects of aquifer material and of the water may be safely neglected.

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