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WTAQ: Computer program for calculating drawdowns and estimating hydraulic properties for confined and water-table aquifers


Source code for version 2.1 (June 29, 2012)

Superseded version 1.3 (June 29, 2012)

  • Although WTAQ version 1.3 is superseded by version 2.1, version 1.3 of the program is maintained for those users who do not need the revised model of drainage from the unsaturated zone provided in version 2.1 of the code.
  • A Readme.txt [6KB TXT] file containing installation instructions is included with the Microsoft Windows software distribution file.
  • WTAQ version 1.3 compiled for Microsoft Windows [690KB EXE], with source code, documentation, and test problems.


Barlow, P.M., and Moench, A.F., 2011, WTAQ version 2 — A computer program for analysis of aquifer tests in confined and water-table aquifers with alternative representations of drainage from the unsaturated zone: U.S. Geological Survey Techniques and Methods 3-B9, 41 p.

Barlow, P.M., and Moench, A.F., 1999, WTAQ — A computer program for calculating drawdowns and estimating hydraulic properties for confined and water-table aquifers: U.S. Geological Survey Water-Resources Investigations Report 99-4225, 74 p.

Point of Contact

Support is provided for correcting bugs and clarification of how the code is intended to work. Only limited assistance can be provided for applying WTAQ to specific problems. For support, contact:

Paul Barlow
U.S. Geological Survey
10 Bearfoot Road
Northborough, MA 01532

Other USGS Groundwater Software

The USGS develops groundwater RSS, water-quality, surface-water, and other water-resources software for use by the USGS in fulfilling its mission. Most of this software is available online for download at no charge.

Disclaimers and Notices

Please refer to the USGS Water Resources Software User Rights Notice for complete use, copyright, and distribution information. This software has been approved for release by the U.S. Geological Survey (USGS). Although the software has been subjected to rigorous review, the USGS reserves the right to update the software as needed pursuant to further analysis and review. No warranty, expressed or implied, is made by the USGS or the U.S. Government as to the functionality of the software and related material nor shall the fact of release constitute any such warranty. Furthermore, the software is released on condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.

See also, USGS policy on linking to non-Federal web sites.

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Page Last Modified: Friday, 21-Aug-2015 15:07:50 EDT