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Open-File Report 2008-1242

Prepared in cooperation with the Pennsylvania Department of Environmental Protection

User’s Guide to the Water-Analysis Screening Tool (WAST): A Tool for Assessing Available Water Resources in Relation to Aquatic-Resource Uses

By Marla H. Stuckey and James L. Kiesler


Thumbnail of and link to report PDF (10.4 MB)

A water-analysis screening tool (WAST) was developed by the U.S. Geological Survey, in partnership with the Pennsylvania Department of Environmental Protection, to provide an initial screening of areas in the state where potential problems may exist related to the availability of water resources to meet current and future water-use demands. The tool compares water-use information to an initial screening criteria of the 7-day, 10-year low-flow statistic (7Q10) resulting in a screening indicator for influences of net withdrawals (withdrawals minus discharges) on aquatic-resource uses. This report is intended to serve as a guide for using the screening tool.

The WAST can display general basin characteristics, water-use information, and screening-indicator information for over 10,000 watersheds in the state. The tool includes 12 primary functions that allow the user to display watershed information, edit water-use and water-supply information, observe effects downstream from edited water-use information, reset edited values to baseline, load new water-use information, save and retrieve scenarios, and save output as a Microsoft Excel spreadsheet.

First posted January 26, 2009

  • Appendixes 1-5 (251.6 MB)
    This is an electronic copy of Appendixes 1 through 5. Appendixes 1, 3, and 5 are pdf files. Appendix 2 is a jpg file. Appendix 4 is a folder containing 3 Microsoft Office Access databases.

For additional information contact:
Director, Pennsylvania Water Science Center
U.S. Geological Survey
215 Limekiln Road
New Cumberland, Pennsylvania 17070

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

Stuckey, M.H., and Kiesler, J.L., 2008, User’s guide to the water-analysis screening tool (WAST)—A tool for assessing available water resources in relation to aquatic-resource uses: U.S. Geological Survey Open-File Report 2008-1242, 19 p.




Assessing Screening-Tool Results

User Interface

Limitations of WAST



References Cited

Appendix 1. Water-Analysis Screening Tool Code

Appendix 2. Reference Libraries Needed to Run the Water-Analysis Screening Tool

Appendix 3. Data Dictionaries for the Water-Analysis Screening Tool Databases

Appendix 4. Example Databases

Appendix 5. Guidelines for Resolving Problems Encountered While Running the Water-Analysis Screening Tool

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