A numerical method is presented for the analysis of a pumped well in a homogeneous aquifer with allowance made for the decrease in saturated depth, vertical components of flow, the possibility of regions of the aquifer changing between the confmed and unconfmed states and the effect of different outer boundaries. The method is based on a discrete space, backward difference time, approximation. A particular example considered in detail concerns heavy pumping from one of a regular array of wells in an unconfmed aquifer until the drawdown in the well reaches a critical value. Non-dimensional curves are presented relating the time and volume dewatered t o the quantity discharged from the well. A further example investigates the effect of an initial confming pressure on the aquifer behaviour. 'Paper No. 74040 of the Water Resources Bulletin. Discussions are open until June 1, 1975.
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