Jason M. Fine 2017 Version 1.0 - Original Release 10/31/2017 groundwater model Reston, VA, USA U.S. Geological Survey https://doi.org/10.5066/F7S181FC Jason M. Fine Matthew D. Petkewich Bruce G. Campbell 2017 Publication Scientific Investigations Report 2017-5128 Reston, VA, USA U.S. Geological Survey https://doi.org/10.3133/sir20175128 An existing three-dimensional model (MODFLOW-2000) by Petkewich and Campbell (2007) (https://pubs.usgs.gov/sir/2007/5126/) was updated to simulate six predictive water-management scenarios that were created to simulate potential changes in groundwater flow and groundwater-level conditions in the Mount Pleasant, South Carolina area. The model was recalibrated to conditions from 1900 to 2015. Simulations included six scenarios: (1) maximize Mount Pleasant Waterworks reverse-osmosis plant capacity by increasing groundwater withdrawals from 3.9 million gallons per day (Mgal/d) in 2015 to 8.6 Mgal/d from the Middendorf aquifer; (2) same as Scenario 1, but with the addition of a 0.5 Mgal/d supply well in the Middendorf aquifer near Moncks Corner, SC; (3) same as Scenario 1, but with the addition of a 1.5 Mgal/d supply well in the Middendorf aquifer near Moncks Corner, SC; (4) maximize Mount Pleasant Waterworks well capacity by increasing withdrawals from the Middendorf aquifer from 3.9 Mgal/d in 2015 to 10.2 Mgal/d (5) minimizing Mount Pleasant Waterworks surface-water purchase from the Charleston Water System by adding supply wells and increasing withdrawals from the Middendorf aquifer from 3.9 Mgal/d in 2015 to 12.2 Mgal/d; and (6) same as Scenario 1, but with the addition of quarterly model stress periods to simulate seasonal variations in the groundwater withdrawals. 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/sir20175128). The model was recalibrated to simulate the effects of proposed water-managment scenarios in the Mount Pleasant, South Carolina well fields. The development of the model input and output files included in this data release are documented in U.S. Geological Survey Scientific Investigations Report 2017-5128 (https://doi.org/10.3133/sir20175128). Support is provided for correcting errors in the data release and clarification of the modeling conducted by the U.S. Geological Survey. Users are encouraged to review the model documentation reports (https://pubs.usgs.gov/sir/2007/5126/) and (https://doi.org/10.3133/sir20175128) to understand the purpose, construction, and limitations of this model. The models will run successfully only if the original directory structure is correctly restored. The model archive is broken into several pieces to reduce the likelihood of download timeouts. Instructions for reconstructing the original directory structure and running the models included in this data release and described in the model documentation report can be found in the readme.txt ASCII file which can be downloaded as part of this data release. 19000101 20160101 publication date Complete Not planned -83.786434 -76.289479 35.881171 29.923548 USGS Thesaurus usgsgroundwatermodel MODFLOW-2000 Groundwater InlandWaters Groundwater Model ISO 19115 Topic Category geoscientificInformation inlandWaters environment USGS Metadata Identifier USGS:58aa68ec-fb5c-448f-9652-1ca121f42711 Geographic Names Information System South Carolina Middendorf aquifer Mount Pleasant Charleston County None. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from this data release. none Jason M. Fine U.S. Geological Survey mailing and physical

3916 Sunset Ridge Rd.

Raleigh NC 27607 USA 919-571-4034 jmfine@usgs.gov https://water.usgs.gov/GIS/browse/SIR2017-5128Thumbnail.jpg Image of the model domain and active area of the model. jpg Mount Pleasant Waterworks None Unclassified None Matthew D. Petkewich Bruce G. Campbell 2007 Publication Scientific Investigations Report 2007-5126 Reston, VA, USA U.S. Geological Survey https://pubs.er.usgs.gov/publication/sir20075126 Matthew D. Petkewich Bruce G. Campbell 2009 Publication Scientific Investigations Report 2009-5185 Reston, VA, USA U.S. Geological Survey https://pubs.usgs.gov/sir/2009/5185/ An existing transient groundwater flow model of the Mount Pleasant, South Carolina area was recalibrated by using parameter estimation methods to help assess the ability of the Mount Pleasant model to predict the effects of changing stresses on the hydrologic system. Simulated changes in water levels through time were compared to 29,534 water level observations in 5,243 wells. These observations were used as calibration targets during parameter estimation. No formal logical accuracy tests were conducted Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record and the associated model documentation report (https://doi.org/10.3133/sir20175128) for additional details. No formal positional accuracy tests were conducted No formal positional accuracy tests were conducted The process used to develop and calibrate model is fully described in the model documentation report (https://doi.org/10.3133/sir20175128). 2017 raster pixel NAD_1983_StatePlane_South_Carolina_FIPS_3900_Feet 32.5 34.8333333333 -81.0 31.83333333333333 1999996.0 0.0 row and column 1000.0 1000.0 feet National Geodetic Vertical Datum of 1929 1.0 feet Attribute values SIR2017_5128.shp ESRI Polygon shapefile U.S. Geological Survey Area Text string indicating is polygon area is active or inactive in the model. https://doi.org/10.3133/sir20175128 usgsgroundwatermodel Delineation of active and inactive areas in the model. https://doi.org/10.3133/sir20175128 Fine, J.M., 2017, MODFLOW-2000 model data sets used in the simulation of Groundwater Flow and Pumping Scenarios for 1900-2050 near Mount Pleasant, South Carolina: U.S. Geological Survey data release https://doi.org/10.5066/F7S181FC U.S. Geological Survey Michael Ierardi IT Specialist mailing and physical address

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Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov 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. readme.txt 1.0 ASCII text file This ASCII text file describes the model data release. This file also includes description of the model input and output files and instructions on how to run the models contained in this data release. 0.045 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/readme.txt modelgeoref.txt 1.0 ASCII text file This ASCII text file defines the four corners of the model domain in decimal degrees. 0.798 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/modelgeoref.txt ancillary.zip 1.0 ZIP This ZIP file contains ancillary data including budget figure data, hydraulic conductivity data, hydrograph figure data, water-level data, and water-use data. This data was used to compile the model datasets. 4.271 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/ancillary.zip bin.zip 1.0 ZIP This ZIP file contains the executable file used to run the calibration/verification model and all scenarios documented in the report (https://doi.org/10.3133/sir20175128). These executables were compiled for the 64-bit Windows 7 Operating System. 1.216 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/bin.zip georef.zip 1.0 ZIP file this ZIP file contains a shapefile which defines the extent of the model domain and active portions of the model. 0.037 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/georef.zip model.zip 1.0 ZIP file This Zip file contains all of the model input files used to run the calibration and the 6 scenario simulations included in this data release. 98.451 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/model.zip output.model.calibration.zip 1.0 ZIP file This ZIP file contains results from the model calibration simulation included in this data release. 206.687 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/output.model.calibration.zip output.model_scenario1.zip 1.0 ZIP file This ZIP file contains results from the scenario 1 simulation included in this data release. 276.885 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/output.model_scenario1.zip output.model_scenario2.zip 1.0 ZIP file This ZIP file contains results from the scenario 2 simulation included in this data release. 279.887 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/output.model_scenario2.zip output.model_scenario3.zip 1.0 ZIP file This ZIP file contains results from the scenario 3 simulation included in this data release. 276.893 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/output.model_scenario3.zip output.model_scenario4.zip 1.0 ZIP file This ZIP file contains results from the scenario 4 simulation included in this data release. 276.931 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/output.model_scenario4.zip output.model_scenario5.zip 1.0 ZIP file This ZIP file contains results from the scenario 5 simulation included in this data release. 276.979 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/output.model_scenario5.zip output.model_scenario6.zip 1.0 ZIP file This ZIP file contains results from the scenario 6 simulation included in this data release. 910.232 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/output.model_scenario6.zip source.zip 1.0 ZIP file ZIP file containing the source files used to run model simulations included in the data release. 8.331 https://water.usgs.gov/GIS/dsdl/gwmodels/SIR2017-5128/source.zip None 20201117 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998