>Peres Et Al. Slug Test Solution for Confined Aquifers

A mathematical solution by Peres et al. (1989) is useful for determining the hydraulic conductivity of nonleaky confined aquifers. The Peres et al. method is based on an exact equation for transforming slug test data into equivalent head data for a constant-rate pumping test with wellbore storage and skin effect. Analysis involves matching a straight-line solution to equivalent head data.

AQTESOLV provides visual and automatic methods for matching the Peres et al. solution to slug test data. This easy-to-use and intuitive software promotes rapid and accurate determination of aquifer properties.

Assumptions

The following assumptions apply to the use of the Peres et al. slug test solution:

  • aquifer has infinite areal extent
  • aquifer is homogeneous, isotropic and of uniform thickness
  • aquifer potentiometric surface is initially horizontal
  • control well is fully penetrating
  • a volume of water, V, is injected or discharged instantaneously from the control well
  • aquifer is nonleaky confined
  • flow is unsteady
  • water is released instantaneously from storage with decline of hydraulic head

References

Peres, A.M., Onur, M. and A.C. Reynolds, 1989. A new analysis procedure for determining aquifer properties from slug test data, Water Resources Research, vol. 25, no. 7, pp. 1591-1602.