New Jersey Water Science Center
Great Falls of the Passaic River at Paterson, N.J.
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Hydrologic Changes Winslow Twp
Project Title:Hydrologic Changes Winslow Twp
Statement of Problem
The Kirkwood-Cohansey aquifer system underlies Winslow Township. Under natural conditions, water from the Kirkwood-Cohansey discharges to the perennial streams of the Great Egg Harbor River basin. This is referred to as the baseflow of the stream. Withdrawals by wells from the Kirkwood-Cohansey intercept ground water that would have discharged to a stream. In addition, if withdrawals are of sufficient intensity, the flow gradients near a stream can be reversed, inducing direct infiltration from the stream.
The infiltration of waste water from recharge lagoons will result in a rise in the water-table in the vicinity of the facility and, in the long term, will result in an increase in the ground-water discharge to streams in the vicinity.
The Township of Winslow, the Camden County Municipal Utilities authority, and the New Jersey Pinelands Commission have signed a Memorandum of Understanding that links the decommissioning of a waste-water recharge lagoon system with changes to the Kirkwood-Cohansey withdrawal rates. These parties have requested assistance from USGS to understand the hydrologic changes that may result from this action.
Strategy and Approach
The project is divided into 3 tasks. The 1st task is to set up a monitoring network of streamflow measurements and ground-water level measurements. The 2nd task is to use a ground-water flow model to predict likely hydrologic changes. The 3rd task is to prepare a report summarizing the findings.