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Development of the Water-Analysis Screening Tool Used in the Initial Screening for the Pennsylvania State Water Plan Update of 2008

U.S. Geological Survey Open-File Report 2008-1106

Prepared in cooperation with the Pennsylvania Department of Environmental Protection

By Marla H. Stuckey


View the report in Portable Document Format (PDF) OFR 2008-1106 (155 KB)


Abstract

The Water Resources Planning Act, Act 220 of 2002, requires the Pennsylvania Department of Environmental Protection (PaDEP) to update the State Water Plan by 2008. As part of this update, a water-analysis screening tool (WAST) was developed by the U.S. Geological Survey, in cooperation with the PaDEP, to provide assistance to the state in the identification of critical water-planning areas. The WAST has two primary inputs: net withdrawals and the initial screening criteria. A comprehensive water-use database that includes data from registration, estimation, discharge monitoring reports, mining data, and other sources was developed as input into the WAST. Water use in the following categories was estimated using water-use factors: residential, industrial, commercial, agriculture, and golf courses. A percentage of the 7-day, 10-year low flow is used for the initial screenings using the WAST to identify potential critical water-planning areas. This quantity, or initial screening criteria, is 50 percent of the 7-day, 10-year low flow for most streams. Using a basic water-balance equation, a screening indicator is calculated that indicates the potential influences of net withdrawals on aquatic-resource uses for watersheds generally larger than 15 square miles. Points representing outlets of these watersheds are colored-coded within the WAST to show the screening criteria for each watershed.

Table of Contents

Abstract
Introduction
Development of the Water-Analysis Screening Tool
     Inventory of Water-Use Data
          Estimated Unregistered Water-Use Data
               Residential
               Non-Residential
               Irrigation
               Livestock
               Golf Courses
          Consumptive Use
     Initial Screening Criteria
Water-Analysis Screening Tool
     Assumptions
     Limitations and Accuracy
Summary
References Cited


Suggested citation:
Stuckey, M.H., 2008, Development of the Water-Analysis Screening Tool used in the initial screening for the Pennsylvania State Water Plan update of 2008: U.S. Geological Survey Open-File Report 2008-1106, 9 p.


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View the report in Portable Document Format (PDF) OFR 2008-1106 (155 KB)

For more information about USGS activities in Pennsylvania contact:
Director
USGS Pennsylvania Water Science Center
215 Limekiln Road
New Cumberland, Pennsylvania 17070
Telephone: (717) 730-6960
Fax: (717) 730-6997
or access the USGS Water Resources of Pennsylvania home page at:
http://pa.water.usgs.gov/.

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