Open-File Report 2008-1242
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
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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
Limitations of WAST
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