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GroMoPo Metadata for West-Central New Jersey USGS model

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Created: Feb 08, 2023 at 3:04 a.m.
Last updated: Feb 08, 2023 at 3:04 a.m.
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This study was undertaken to characterize ground- water flow in the Stony Brook, Beden Brook, and Jacobs Creek drainage basins in west-central New Jersey. The 89-square-mile study area is underlain by dipping beds of fractured siltstone, shale, and sandstone and by massive diabase sills. In all of the rocks, the density of interconnected fractures decreases with depth. A major fault extends through the study area, and rocks on both sides of the fault are extensively fractured. The average annual rates of precipitation and ground-water recharge in the study area are 45.07 inches and 8.58 inches, respectively. The rate of recharge to diabase rocks is about one-half the rate of recharge to other rocks. Part of the surface runoff from diabase rocks enters the ground-water system where it encounters more permeable rocks. Most ground water in the study area follows short, shallow flow paths. A three- dimensional finite-difference model of ground-water flow was developed to test hypotheses concerning geologic features that control ground-water flow in the study area. The decrease in the density of interconnected fractures with depth was represented by dividing the model into two layers with different hydraulic conductivity. The pinching out of water- bearing beds in the dip direction at land surface and at depth was simulated as a lower hydraulic conductivity in the dip direction than in the strike direction. This model can be used to analyze ground-water flow if the area of interest is more than about 0.5 square mile.

Subject Keywords



Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
United States
North Latitude
East Longitude
South Latitude
West Longitude


Additional Metadata

Name Value
DOI 10.3133/wri944147
Depth 152
Scale 101 - 1 000 km²
Layers 2-5 layers
Purpose Groundwater resources;Scientific investigation (not related to applied problem)
GroMoPo_ID 150
IsVerified True
Model Code MODFLOW
Model Link
Model Time SS
Model Year 1995
Model Authors J. Lewis, E. Jacobsen
Model Country United States
Data Available Report/paper only
Developer Email
Dominant Geology Model focuses on multiple geologic materials
Developer Country United States
Publication Title Hydrogeology and ground-water flow, fractured Mesozoic structural-basin rocks, Stony Brook, Beden Brook, and Jacobs Creek drainage basins, west-central New Jersey
Original Developer No
Additional Information MODFLOW model of the Stony Brook, Breden Brook, and Jacobs Creek drainage basins in west-central New Jersey, USA.
Integration or Coupling
Evaluation or Calibration Static water levels
Geologic Data Availability

How to Cite

GroMoPo, K. Compare (2023). GroMoPo Metadata for West-Central New Jersey USGS model, HydroShare,

This resource is shared under the Creative Commons Attribution CC BY.


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