AQTESOLV - Recovery Test Analysis Software

• analyze drawdown and recovery together
• apply the powerful Agarwal transformation to analyze recovery data like drawdowns
• analyze residual drawdowns

With AQTESOLV, you may combine the analysis of drawdown and recovery data to provide a consistent estimate of aquifer properties from the complete set of test data (Figure 1).

Figure 1. Combined analysis of drawdown and recovery data using Theis (1935) type-curve solution (data from USBR 1995).

Use this recovery test method with any of the type curve solutions for pumping test analysis in AQTESOLV.

AQTESOLV features the powerful Agarwal method for the analysis of recovery test data (Figure 2).

Figure 2. Analysis of data from recovery test with Agarwal method using Theis (1935) type-curve solution (data from USBR 1995).

Through a simple transformation of field data, Agarwal (1980) devised a method of recovery test analysis that allows one to use the same type curves developed for the analysis of drawdown data.

AQTESOLV also allows you to perform derivative analysis with the Agarwal recovery method.

AQTESOLV includes traditional residual drawdown plots (Figure 3) that you may use to analyze recovery data. A residual drawdown plot displays s` versus t/t` where s` is residual drawdown, t is time since pumping began and t` is time since pumping stopped.

Figure 3. Analysis of residual drawdown from recovery test using Theis (1935) method (data from USBR 1995).

In groundwater hydrology, one commonly uses a residual drawdown plot with the Theis (1935) residual drawdown solution; however, with AQTESOLV, you may use any type-curve solution to analyze recovery data on a residual drawdown plot.