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Water Budgets and GIS-Based Ground-Water Availability Analysis for the Delaware River Basin

Project Title: Water Budgets and GIS-Based Ground-Water Availability Analysis for the Delaware River Basin
Project Number:2454ASW
Project Chief: (Pennsylvania WSC - Fractured Rock), and (New Jersey WSC - Unconsolidated Sediments).
Period of Project: 01-APR-2003
Cooperator: Delaware River Basin Commission
Project Proposal: Summary


Location of study area.

The purpose of this project was to provide a basin-wide vision for long-range goals and provide direction for guiding future water-resource management to the Delaware River Basin Commission (DRBC) for updating its comprehensive plan. A systematic approach was developed for evaluating existing and future water withdrawals relating to available supply and environmental requirements.

In the first phase of the project, annual water budgets were developed for selected prototype watersheds in Pennsylvania and New Jersey with varying degrees of urbanization and different geological settings. The water-budget equations generated for this phase of the study can be applied to any watershed in the Delaware River Basin. The complexity of the water budgets increased with increasing watershed urbanization and inter-basin transfer of water. Results of the water budget analysis are detailed in Sloto and Buxton, 2005.

In the second phase of the project, two different methods were used to estimate the ground-water availability (1997-2000) for the region underlain by fractured rocks in the upper part of the basin and for surficial aquifers in the region underlain by unconsolidated sediments in the lower part of the basin. Ground-water availability was estimated for the 147 watersheds that make up the Delaware River Basin. Ground-water availability for 109 watersheds underlain by fractured rocks was based on lithology and physiographic province. Ground-water availability for 38 watersheds underlain by unconsolidated sediments was based on predominant surficial geology and land use. Results of the ground-water availability study are described in Sloto and Buxton, 2006.


Sloto, R.A. and Buxton, D.E., 2005, Water budgets for selected watersheds in the Delaware River Basin, eastern Pennsylvania and western New Jersey: U.S. Geological Survey Scientific Investigations Report 2005-5113, 37 p.

Sloto, R.A. and Buxton, D.E., 2006, Estimated ground-water availability in the Delaware River Basin, 1997-2000: U.S. Geological Survey Scientific Investigations Report 2006-5125, 67 p.



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