Documentation of Revisions to the Regional Aquifer System Analysis Model for the New Jersey Coastal Plain
By Lois M. Voronin
MODEL VERSION/TYPE: MODFLOW-96, steady state and transient
AREA STUDIED: New Jersey Coastal Plain
AQUIFERS SIMULATED: 10 regional New Jersey Coastal Plain aquifers
MOST RECENT WITHDRAWALS SIMULATED: 1998
MODEL SIZE: 10 layers, 135 rows, 245 columns
MINIMUM GRID SPACING:0.5 miles x 0.5 miles
MODEL ARCHIVE AVAILABLE ON REQUEST: gs-nj-model-request@usgs.gov
This study and additional studies completed using this model are listed on the Publication and Data tabs at the top of this page.
REPORT ABSTRACT:
The model, which simulates flow in the New Jersey Coastal Plain sediments, developed for the U.S. Geological Survey Regional Aquifer System Analysis (RASA) program was revised. The RASA model was revised with (1) a rediscretization of the model parameters with a finer cell size, (2) a spatially variable recharge rate that is based on rates determined by recent studies, and (3) groundwater withdrawal data from 1981 to 1998. The RASA model framework, which subdivided the Coastal Plain sediments into 10 aquifers and 9 confining units, was preserved in the revised model. A transient model that simulates flow conditions from January 1, 1968, to December 31, 1998, was constructed using 21 stress periods.
The model was calibrated by attempting to match the simulated results with (1) estimated base flow for five river basins, (2) measured water levels in long-term hydrographs for 28 selected observation wells, and (3) potentiometric surfaces in the model area for 1978, 1983, 1998, 1993, and 1998 conditions. The estimated and simulated base flow in the five river basins compare well. In general, the simulated water levels matched the interpreted potentiometric surfaces and the measured water levels of the hydrographs within 25 feet.
All Reports using this model
Analysis of Effects of 2003 and Full-Allocation Withdrawals in Critical Area 1, East-Central New Jersey
Recovery of Ground-Water Levels from 1988 to 2003 and Analysis of Effects of 2003 and Full-Allocation Withdrawals in Critical Area 2, Southern New Jersey
Recovery of Ground-Water Levels From 1988 to 2003 and Analysis of Potential Water-Supply Management Options in Critical Area 1, East-Central New Jersey
Simulated effects of projected 2010 withdrawals on ground-water flow and water levels in the New Jersey coastal plain – A task of the New Jersey Water Supply Plan, 2006 revision
Sources of water to wells in updip areas of the Wenonah-Mount Laurel aquifer, Gloucester and Camden Counties, New Jersey
Simulation of proposed increases in ground-water withdrawals on the Atlantic City 800-foot sand, New Jersey Coastal Plain
Documentation of revisions to the regional aquifer system analysis model of the New Jersey coastal plain
Below are partners associated with this project.
Documentation of Revisions to the Regional Aquifer System Analysis Model for the New Jersey Coastal Plain
By Lois M. Voronin
MODEL VERSION/TYPE: MODFLOW-96, steady state and transient
AREA STUDIED: New Jersey Coastal Plain
AQUIFERS SIMULATED: 10 regional New Jersey Coastal Plain aquifers
MOST RECENT WITHDRAWALS SIMULATED: 1998
MODEL SIZE: 10 layers, 135 rows, 245 columns
MINIMUM GRID SPACING:0.5 miles x 0.5 miles
MODEL ARCHIVE AVAILABLE ON REQUEST: gs-nj-model-request@usgs.gov
This study and additional studies completed using this model are listed on the Publication and Data tabs at the top of this page.
REPORT ABSTRACT:
The model, which simulates flow in the New Jersey Coastal Plain sediments, developed for the U.S. Geological Survey Regional Aquifer System Analysis (RASA) program was revised. The RASA model was revised with (1) a rediscretization of the model parameters with a finer cell size, (2) a spatially variable recharge rate that is based on rates determined by recent studies, and (3) groundwater withdrawal data from 1981 to 1998. The RASA model framework, which subdivided the Coastal Plain sediments into 10 aquifers and 9 confining units, was preserved in the revised model. A transient model that simulates flow conditions from January 1, 1968, to December 31, 1998, was constructed using 21 stress periods.
The model was calibrated by attempting to match the simulated results with (1) estimated base flow for five river basins, (2) measured water levels in long-term hydrographs for 28 selected observation wells, and (3) potentiometric surfaces in the model area for 1978, 1983, 1998, 1993, and 1998 conditions. The estimated and simulated base flow in the five river basins compare well. In general, the simulated water levels matched the interpreted potentiometric surfaces and the measured water levels of the hydrographs within 25 feet.
All Reports using this model
Analysis of Effects of 2003 and Full-Allocation Withdrawals in Critical Area 1, East-Central New Jersey
Recovery of Ground-Water Levels from 1988 to 2003 and Analysis of Effects of 2003 and Full-Allocation Withdrawals in Critical Area 2, Southern New Jersey
Recovery of Ground-Water Levels From 1988 to 2003 and Analysis of Potential Water-Supply Management Options in Critical Area 1, East-Central New Jersey
Simulated effects of projected 2010 withdrawals on ground-water flow and water levels in the New Jersey coastal plain – A task of the New Jersey Water Supply Plan, 2006 revision
Sources of water to wells in updip areas of the Wenonah-Mount Laurel aquifer, Gloucester and Camden Counties, New Jersey
Simulation of proposed increases in ground-water withdrawals on the Atlantic City 800-foot sand, New Jersey Coastal Plain
Documentation of revisions to the regional aquifer system analysis model of the New Jersey coastal plain
Below are partners associated with this project.