Abstract

A case is made for the use of simple models of groundwater flow emphasizing the salient regional characteristics of groundwater basins and for relating them to basin-wide features of groundwater flow. As an example a simple formula for the “natural basin yield” as defined by Freeze is calculated from a model which was introduced by Tóth. The Tóth model is then extended to take seasonal fluctuations of the water table into account; the type of response of the instantaneous head distribution in the basin due to elastic storage in the aquifer may range from severe distortions of Tóth's steady-state distribution to virtually no distortion. The type of response depends on two ratios which can be easily calculated from the basin parameters.

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