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New Jersey Water Science Center
Great Falls of the Passaic River at Paterson, N.J.
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Manasquan River Water Budget
Project Title: Manasquan River Water Budget
The overall goal of the project is to estimate a water budget at the study site for a wet, a dry, and an average precipitation year. These budgets will be based on data collected on-site during April 2008 – March of 2009 and historical information from the area.
The study objectives are:
Statement of Problem
The County of Monmouth recently purchased a parcel of land in a rapidly urbanizing area of Monmouth County, New Jersey. The Monmouth County Park System (MCPS) in partnership with the Manasquan River Watershed Association (MRWA) plans to return the land to a more natural state and has received funding from the New Jersey State Wetlands Mitigation Council for a stream restoration project on an upstream reach of the Manasquan River adjacent to Turkey Swamp Park. Before the restoration can proceed the MRWA needs to produce a water budget for the site to determine if the project is capable of supporting wetland plant material over the long-term.
Strategy and Approach
The approach is to develop a water budget for the proposed wetlands following methods described in the draft report, “Regionalized Water Budget Manual for Compensatory Wetland Mitigation Sites in New Jersey”, by Jason Lewis and Christine Wieben (written communication, 2007). This report will be the basis for NJDEP water budget requirements for created wetlands in the state. The water budget for this study will be based on the following equation:
S = [P + Si + Gi ] – [ET + So + Go]
Calculations will be done on a daily basis.
The primary source of water to the site is assumed to be the stream. The wetland is assumed to be designed so that it will be periodically flooded from storm flows in the stream. Ground-water discharge is believed to be a secondary water source.
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