A general solution of the water table drawdown for unsteady radial flow to a pumped well is considered. Tabulated values for the free surface function are calculated for the range of parameters occurring in practical situations. A comparison with the available solution of Boulton is made, an appraisal of the assumptions being introduced in the derivation of the solutions. A numerical example of unsteady radial flow in an unconfined aquifer with details of the main part of the computer program is presented.
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Streltsova et al. (1973) studied this question.
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