MODFLOW-2000 and MODPATH used to evaluate groundwater flow and selected groundwater-management scenarios in the Brunswick area, Georgia, 2004-2015

A previously published groundwater flow model (https://pubs.usgs.gov/sir/2005/5089/) was
revised with refined grid spacing and updated hydrogeolgic framework and hydrologic properties
(http://doi.org/10.3133/sir20155061) and used in this study to predict the effects of Upper
Floridan aquifer (UFA) groundwater pumpage on horizontal hydraulic-head gradients in the
upper-water-bearing zone of the UFA in the downtown Brunswick area, Glynn County, Georgia.
The model used MOFLOW-2000 and was calibrated using groundwater-use information for
October 2015, which was the basis for the 2015 Base Case simulation. A comparison of the
2015 Base Case simulation with seven groundwater-management scenarios evaluated potential
changes to the upper-water-bearing zone of the UFA near downtown Brunswick.
Particle-tracking analysis, using MODPATH, provided pathlines and time-of-travel for the 2015
Base Case simulation and scenario C. This USGS data release contains all of the input and
output files for the simulations described in the associated model documentation report
(https://doi.org/10.3133/sir20195035).