Jacob-Lohman Solution for Constant-Head Tests in Confined Aquifers

Advanced Software for Pumping Tests/Slug Tests/Constant-Head Tests	Official Developer Web Site by HydroSOLVE, Inc.
Jacob-Lohman
*The World's LEADING* Aquifer Test Analysis Software Since 1989!**

Quick Links

Import Wizard

Pumping Tests

Step Tests

Slug Tests

Constant-Head Tests

Join Users' Group

Brochure (pdf)

Recommended Book:

Butler (1998)

Jacob-Lohman Solution for Constant-Head Tests in Confined Aquifers

Description

A mathematical solution by Jacob and Lohman (1952) is useful for determining the hydraulic properties (transmissivity and storativity) of confined aquifer. Analysis involves matching the Jacob-Lohman solution to discharge data collected during a constant-head test. AQTESOLV includes type curve and straight-line versions of the Jacob-Lohman solution.

AQTESOLV provides visual and automatic methods for matching the Jacob-Lohman solution to constant-head 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 Jacob-Lohman solution:

	aquifer has infinite areal extent
	aquifer is homogeneous, isotropic and of uniform thickness
	potentiometric surface is initially horizontal
	aquifer is confined
	flow is unsteady
	wells are fully penetrating
	water is released instantaneously from storage with decline of hydraulic head

Solution Options

AQTESOLV provides the following options for the Jacob-Lohman solution:

recovery

Benchmark

Comparison of AQTESOLV (blue line) and published data (symbols).

References

Jacob, C.E. and S.W. Lohman, 1952. Nonsteady flow to a well of constant drawdown in an extensive aquifer, Trans. Am. Geophys. Union, vol. 33, pp. 559-569.