GroMoPo Metadata for Pheasant Plains MODFLOW model


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Owners: gromopo_admin
Type: Resource
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Created: Feb 08, 2023 at 3:28 p.m.
Last updated: Feb 08, 2023 at 3:28 p.m.
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Abstract

Reliable ground water models require both an accurate physical representation of the system and appropriate boundary conditions. While physical attributes are generally considered static, boundary conditions, such as ground water recharge rates, can be highly variable in both space and time. A practical methodology incorporating the hydrologic model HELP3 in conjunction with a geographic information system was developed to generate a physically based and highly detailed recharge boundary condition for ground water modeling. The approach uses daily precipitation and temperature records in addition to land use/land cover and soils data. The importance of the method in transient ground water modeling is demonstrated by applying it to a MODFLOW modeling study in New Jersey. In addition to improved model calibration, the results from the study clearly indicate the importance of using a physically based and highly detailed recharge boundary condition in ground water quality modeling, where the detailed knowledge of the evolution of the ground water flowpaths is imperative. The simulated water table is within 0.5 m of the observed values using the method, while the water levels can differ by as much as 2 m using uniform recharge conditions. The results also show that the combination of temperature and precipitation plays an important role in the amount and timing of recharge in cooler climates. A sensitivity analysis further reveals that increasing the leaf area index, the evaporative zone depth, or the curve number in the model will result in decreased recharge rates over time, with the curve number having the greatest impact.

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
United States
North Latitude
40.4814°
East Longitude
-74.5610°
South Latitude
40.4095°
West Longitude
-74.6437°
Leaflet Map data © OpenStreetMap contributors

Content

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Additional Metadata

How to Cite

GroMoPo, K. Compare (2023). GroMoPo Metadata for Pheasant Plains MODFLOW model, HydroShare, http://www.hydroshare.org/resource/8f934b3e7aad465fa876676311678262

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

http://creativecommons.org/licenses/by/4.0/
CC-BY

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