A GRAPHICAL-METHOD FOR STORAGE COEFFICIENT DETERMINATION FROM QUASI-STEADY-STATE FLOW DATA

A simple, approximate but practical graphical method is proposed for e stimating the storage coefficient independently from the transmissivit y value, provided that quasi-steady state flow data are available from a pumping test. In the past, quasi-steady state flow distance-drawdow n data have been used for the determination of transmissivity only. Th e method is applicable to confined and leaky aquifers. The application of the method has been performed for various aquifer test data availa ble in the groundwater literature. The results are within the practica l limits of approximation compared with the unsteady state flow soluti ons.