Orange County NC Website
Browse       Search
66 <br /> Envirotactics <br /> An Earth Systems Company <br /> 5.1 Distance Drawdown Analysis <br /> This method calculates transmissivity and storage coefficient using distance and drawdown values from an <br /> aquifer test. This method can be used with transient flow conditions (Jacob straight-line distance- <br /> drawdown). <br /> This method is not applicable to this study since: <br /> • The pumping rate was not constant, and <br /> • No drawdown was measured away, in a monitoring well, situated at a certain distance from the <br /> Proposed Community Well. <br /> Distance Drawdown Analysis <br /> Calculate transmissivity and storage coefficient using <br /> distance and drawdown values from an aquifer test. <br /> Method can be used with transient flow conditions(Jacob <br /> straight-line distance-drawdown). <br /> Return to Modeling Menu <br /> Distance(feet) Drawdown(feet) <br /> Other Parameters <br /> Pumping Rate(gallons per minute) <br /> Length of Test(minutes) <br /> There a+e 1,440 minutes per day <br /> Radius of Well(feet) <br /> 5.2 Reverse Distance Drawdown Analysis <br /> This method calculates drawdown using known transmissivity and storage coefficient values. This method <br /> can be used with transient flow conditions (Jacob straight-line distance-drawdown). <br /> Envirotactics, LLC Page 16 of 20 Groundwater Modeling Report <br /> (732) 449-0077 Project No.6704 <br />