ABSTRACT
Three mathematical/graphical methods are presented for computing the key characteristics of confined aquifers from pumping-test data. They are The Theis Method, The Cooper and Jacob Method, and Distance-Drawdown Method. These analyses are based on an assumption of nonequilibrium flow conditions. The Cooper and Jacob Method is a simplified variation of the Theis method applicable to field measurements made once flow in the cone of depression approaches steady-state conditions. Distance-Drawdown Method is a quick method often used to obtain tentative values of aquifer properties while a pumping test is in progress. Theis used a model of radial heal flow from a central element in a metal plate to simulate the flow of water to a pumping well. Distance-Drawdown Method is a quick method often used to obtain tentative values of aquifer properties while a pumping test is in progress.
