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Two-layer aquifer

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Two-layer aquifer

Two-layer unconfined aquifer



aquifer system consists of two layers with different properties and has infinite lateral extent;

overlying aquitard is unconfined, isotropic;

underlying aquifer is confined, isotropic;

pumping well fully penetrates the aquifer; wellbore storage capacity is neglected;

drawdown is estimated in the aquifer at any distance from the pumping well;

crossflow in the overlying aquitard is vertical.


Two-layer unconfined aquifer system (cross section).


Pumping regimes:

One well pumped at a constant rate



One or several wells pumped at a variable rate




Мироненко В.А., Сердюков Л.И. Обработка результатов опытных откачек, проведенных в условиях двухслойной толщи // Разведка и охрана недр. 1968. № 10. С. 34–38.

Cooley R.L., Case C.M. Effect of a water table aquitard on drawdown in an underlying pumped aquifer // Water Resources Research. 1973. Vol. 9, N 2. P. 434–447.