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  • MODFLOW-2000 model used to evaluate alternative withdrawal strategies on groundwater flow in the unconfined Kirkwood-Cohansey aquifer system, the Rio Grande water-bearing zone, and the Atlantic City 800-foot sand in the Great Egg Harbor and Mullica River Basins, New Jersey

    Metadata Updated: November 12, 2020

    A three-dimensional groundwater-flow model (MODFLOW-2000 ) of the Kirkwood-Cohansey aquifer system, Rio Grande water-bearing zone, and Atlantic City 800-foot sand in the Great Egg Harbor and Mullica River Basins, N.J. was developed to simulate the effects of withdrawals on streamflow and groundwater supply. Increasing groundwater withdrawals from the unconfined Kirkwood Cohansey aquifer system is a major concern because of the potential for streamflow depletion and the resulting ecological effects on aquatic habitats, wetlands, and vernal ponds. In the confined Atlantic City 800-foot sand aquifer water levels have been steadily declining and most of the groundwater withdrawn from the Atlantic City 800-foot sand ultimately comes from the Kirkwood -Cohansey aquifer system. The groundwater flow model was used to simulate scenarios under three possible conditions: average 1998 to 2006 withdrawals (Average scenario), full-allocation withdrawals (Full Allocation scenario), and projected 2050-demand withdrawals (2050 Demand scenario). Three adjusted scenarios, variations of the Average, Full Allocation, and 2050 Demand scenarios, were simulated where withdrawals were modified in stages with the intent to successively eliminate or minimize the base-flow deficits. Monthly base-flow depletion criteria were determined using the NJDEP Low-Flow Margin method to estimate available water on an annual basis and if water-supply deficits exist. The model simulates monthly stress periods from 1998 through 2006. An existing regional model of the New Jersey Coastal Plain was revised to provide boundary conditions for the Great Egg Harbor and Mullica River Basin model (GEM). This USGS data release contains all of the input and output files for the simulations described in the associated model documentation report (http://pubs.usgs.gov/sir/2012/5187/).

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Date November 21, 2017
    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020
    Reference Date(s) January 1, 2018 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from DOI Open Data

    Graphic Preview

    Image of the model domain and active area of the model.

    Additional Metadata

    Resource Type Dataset
    Metadata Date November 21, 2017
    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020
    Reference Date(s) January 1, 2018 (publication)
    Responsible Party U.S. Geological Survey (Point of Contact)
    Contact Email
    Guid
    Access Constraints Use Constraints: none, Access Constraints: None. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from this data release.
    Bbox East Long -73.916454
    Bbox North Lat 40.063713
    Bbox South Lat 39.009841
    Bbox West Long -75.273443
    Coupled Resource
    Frequency Of Update notPlanned
    Graphic Preview Description Image of the model domain and active area of the model.
    Graphic Preview File https://water.usgs.gov/GIS/browse/sir2012-5187Thumbnail.jpg
    Graphic Preview Type jpg
    Licence The data have been approved for release by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from authorized or unauthorized use. Although the data, software, and related material have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
    Metadata Language
    Metadata Type geospatial
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 1998-01-01
    Temporal Extent End 2006-09-30

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