|Figure 1. Constant-rate pumping test in nonleaky confined channel aquifer (Walton 1970).|
Analysis of multiple observation wells is not limited to nonleaky confined aquifers. In the following figure, we see the analysis of drawdown data from a constant-rate pumping test in a leaky confined aquifer with three observation wells.
|Figure 2. Constant-rate pumping test in leaky confined aquifer (USBR 1995).|
We can use AQTESOLV to analyze multi-well tests in phreatic aquifers, too. For example, two fully penetrating observation wells are used for the interpretation of a constant-rate pumping test in an unconfined aquifer with delayed yield near Gironde, France (Figure 3).
|Figure 3. Constant-rate pumping test in unconfined aquifer with delayed yield (Neuman 1975).|
Figure 4 shows the interpretation of a multi-well constant-rate pumping test in a double-porosity fractured aquifer using a solution by Moench (1984).
|Figure 4. Constant-rate pumping test in double-porosity fractured aquifer (Moench 1984).|
In each of the preceding examples, one set of aquifer properties was used to match drawdown data from all observation wells in a data set. At times, however, you may wish to match only a few wells by themselves. You may accomplish this task using either visual or automatic curve matching in AQTESOLV.
Sometimes you start out with only one or two observation wells in a data set and wish to add more wells later. Adding observation wells is easy with AQTESOLV. Choose Wells from the Edit menu and click New to enter data for a new well.
To find worked examples of pumping tests with multiple observation wells, check out the AQTESOLV Help file/manual or visit the Application Gallery at the AQTESOLV web site.