Step‐Drawdown Test Analysis by Computer

Many geohydrologists believe that the step-drawdown test is useful in determining many important characteristics of a well, whereas others altogether question its utility. In addition to this controversy, its application is hindered because the graphical analysis of data is unwieldy. A computer code is presented for step-drawdown test analysis which is efficient and simple to use; moreover, it is an example of how optimization can be used in a practical way. A listing of the FORTRAN code is included along with some example calculations.