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Brian T. Frus Page 1 of 2 <br /> Proj ect: 31+0-01.04 <br /> Date: January 28, 1993 <br /> ; This program uses the radial flow equation, to estimate soil permeability <br /> given flow "rate, well vacuum, radius of influence and well construction data. <br /> Once a value for permeability is determined, a plot of flow rate versus <br /> vacuum is generated. Field step test data is shown on the same plot for <br /> comparison.' ° <br /> Define Major Parameters for extraction Probe 1 <br /> n := 3 Number of data sets (including step test data) <br /> 0 . .n -,. 1 Range Variable Used for Calculations <br /> H := 1• ft ` Screened Intergyral <br /> kg <br /> µ := 0.000018 Air Viscosity <br /> [m- sec] t <br /> Patm 1- atm Atmospheric Pressure Absolute <br /> Rw :_ .625 in Well Radius <br /> Ri := 14• ft! Radius of Influence <br /> Q := 2• cfm; Flow Rate <br /> ; ; <br /> Pwg :_ Well Pressure - Gauge <br /> 4 <br /> 84- in H2O . Convert Gauge Pressure to Absolute: <br /> 85- in H2O <br /> 90- in H2O i. Pw . := Patm - Pwg <br /> i . <br /> j Solve Radial Flow Equation for k (permeability) <br /> rRi] <br /> wkdarcy <br /> In <br /> kdarcy = — - dart <br /> i H 7r 2 2.099 <br /> Patm 2.071 <br /> PW 1.0 - 1.939 <br /> i PW <br />• i <br />("; Note: Permeability in darcies (l darcy = 1*10"-8 cm^2) <br />