New & Noteworthy

 Press Release: Deficit in Nation's Aquifers Accelerating

 MODFLOW-USG: An Unstructured Grid Version of MODFLOW

 USGS Threatened and Endangered Stations

 Report to Congress: Progress Toward Establishing a National Assessment of Water Availability and Use

 Fact Sheet: Understanding and Managing the Effects of Groundwater Pumping on Streamflow

  Annotated List of Classic Pre-1980 USGS Groundwater Papers on Quantitative Groundwater-Flow Analysis

  WaterNow: Get current water conditions by text or email

  Circular: Streamflow Depletion By Wells: Understanding and Managing the Effects of Groundwater Pumping on Streamflow

USGS Groundwater Watch

USGS maintains a network of active wells to provide basic statistics about groundwater levels.

USGS in Your State

USGS Water Science Centers are located in each state.

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

Information

• Summary of WTAQ version 2.1, including release history [6KB TXT]

Source code for version 2.1 (June 29, 2012)

• A readme.txt [6KB TXT] file containing installation instructions is included with the Microsoft Windows software distribution file.
• WTAQ version 2.1 compiled for Microsoft Windows [1.6MB EXE], with source code, documentation, and test problems.

Superseded version 1.3 (June 29, 2012)

• Although WTAQ version 1.3 is superseded by version 2.1, version 1.3 of the program is maintained for those users who do not need the revised model of drainage from the unsaturated zone provided in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.

Documentation

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 , 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 Software User Rights Notice for complete use, copyright, and distribution information. The USGS provides no warranty, expressed or implied, as to the correctness of the furnished software or the suitability for any purpose. The software has been tested, but as with any complex software, there could be undetected errors. Users who find errors are requested to report them to the USGS.

References to non-USGS products, trade names, and (or) services are provided for information purposes only and do not constitute endorsement or warranty, express or implied, by the USGS, U.S. Department of Interior, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.