Abstract
In multiaquifer systems, aquifers are separated by aquitards through which water flows from one aquifer to another. The assumption of vertical flow in aquitards and horizontal flow in aquifers has been found reasonable in many field situations and has been utilized in the design of quasi three-dimensional flow models. It has also been revealed by earlier workers that the vertical leakage is affected by the storage in the aquitard as well as by its permeability and the properties of the adjacent aquifers. In this paper one-dimensional finite-element analysis is used to determine the effect of storage in an aquitard separating two confined aquifers on the distribution of hydraulic head in the aquitard and the flux from or into the adjacent aquifer. This paper also considers how many nodes are required to solve the problem numerically with adequate accuracy. The results of this study should be helpful in the design of numerical schemes for analysing multiaquifer systems.
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