ON ANALYSIS OF STEP‐DRAWDOWN DATA

. A procedure is described for the analysis of step- drawdown pumping test data. The method uses the general form of the drawdown equation during a step with the superposition of the effects of incremental pumping between steps. An interactive computer code based on this procedure is developed to estimate aquifer characteristics and well-loss factor from the observed time-drawdown data at different discharge rates. Analysis of specific step-drawdown data indicates the adaptability of the code for practical application.