GGSD Program Details for VARQ

VARQ

Category	Aquifer test analysis
Publisher	Kansas Geological Survey
Platform	DOS
Status	Public domain
Description	VARQ calculates aquifer parameters by automatically fitting pump test data and the Theis type curve. The program supports multiple pumping wells with variable discharges. It uses convolution and sensitivity analysis to obtain the "best" fit of aquifer parameters (transmissivity and storage coefficient) in a least squares sense. The method can be used to analyse the drawdown data observed during pumping and residual drawdown data obtained during the recovery period and analyse drawdown and recovery data conjunctively. Constant drawdown and variable discharge data of artesian flowing wells can also be analysed, as well as the specific capacity of a pumping well. As a measure of error, the root-mean-square (RMS) error in drawdown is calculated along with the correlation coefficient between pumping test data and the theoretically generated data, using the converged values of the parameters.
Cost	US Dollars 50
Data formats supported	None stated
Supplier in United States of America	International Ground Water Modeling Center