Step-Drawdown Test Analysis

Leaky Confined Methods

AQTESOLV Advantage

Only AQTESOLV provides methods for nonleaky and leaky confined aquifers with options for partial penetration and wellbore storage.

"I have been using AQTESOLV since 1989. It has been a great educational tool and I highly recommend it to all groundwater professionals."
--Prof. Al Woodbury, University of Manitoba

AQTESOLV has more features for the interpretation of step-drawdown tests than competing software. Other products limit step-drawdown test analysis to fully penetrating line-source wells in nonleaky confined aquifers.

AQTESOLV expands your options for step-drawdown tests to include solutions for leaky confined aquifers with options for partially penetrating wells and wellbore storage.

Tests in Leaky Confined Aquifers

Methods for step-drawdown tests in the literature typically assume nonleaky confined conditions; however, as shown by Bear (1979), most constant-rate pumping test solutions may be adapted for the analysis of linear and nonlinear well loss associated with step-drawdown tests.

AQTESOLV gives you a choice of models beyond nonleaky confined conditions for greater flexibility in your analysis of step-drawdown tests.

For example, AQTESOLV adapts the solution by Hantush and Jacob (1955) for the analysis of step-drawdown tests in leaky confined aquifers (Figure 1).

Analysis of a step-drawdown test in a leaky confined aquifer — Figure 1. Analysis of step-drawdown test with recovery assuming a leaky confined aquifer (data from Clark 1977).

See also: step-drawdown tests