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Calculations for Aquifer Properties <br /> TransmissivxTy -Jacob Method <br /> i1 Graph Drawdown vs Time for each monitonng well on semi-lognthmic paper <br /> Drawdown in feet <br /> ITime in minutes <br /> 2 Calculate change in drawdown (As) per log cycle for each graph <br /> 3 Determine Transmussxvxty(T) <br /> T = 264 Q/As Q=pumpmg rate in gallons per minute (gpm) <br /> T=transmissivrty(gpd/ft) <br /> Storat3vity <br /> 4 Extend line on Drawdown vs Time graph for each well <br /> Read time where this line crosses zero drawdown <br /> Convert time to days (to) <br /> 5 Determine radius from pumping well in feet (r) <br /> For pumping well, use well diameter <br /> I 6 Calculate storativzty,(S) <br /> S =03Tto rx <br /> I <br /> Advanced GeoEnvtron=mtnI Inc. <br />