Publication: Ground-Water Availability of the Atlantic Coastal Plain of North and South Carolina https://pubs.er.usgs.gov/publication/pp1773 Data release: MODFLOW2000 and MODFLOW-ASP models used to simulate the groundwater flow in the Atlantic Coastal Plain, North and South Carolina and parts of Georgia and Virginia, Predevelopment to 2004 http://dx.doi.org/10.5066/F7RJ4GJF MODEL ARCHIVE ------------- Archive created: 2016-19-05 --------------------------------------------------------------------------------- DISCLAIMER- THE FILES CONTAINED HEREIN ARE PROVIDED AS A CONVENIENCE TO THOSE WHO WISH TO REPLICATE SIMULATIONS OF GROUND-WATER FLOW THAT ARE DESCRIBED IN U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1773 ANY CHANGES MADE TO THESE FILES COULD HAVE UNINTENDED, UNDESIRABLE CONSEQUENCES. THESE CONSEQUENCES COULD INCLUDE, BUT MAY NOT BE NOT LIMITED TO: ERRONEOUS MODEL OUTPUT, NUMERICAL INSTABILITIES, AND VIOLATIONS OF UNDERLYING ASSUMPTIONS ABOUT THE SUBJECT HYDROLOGIC SYSTEM THAT ARE INHERENT IN RESULTS PRESENTED IN U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1773. THE U.S. GEOLOGICAL SURVEY ASSUMES NO RESPONSIBILITY FOR THE CONSEQUENCES OF ANY CHANGES MADE TO THESE FILES. IF CHANGES ARE MADE TO THE MODEL, THE USER IS RESPONSIBLE FOR DOCUMENTING THE CHANGES AND JUSTIFYING THE RESULTS AND CONCLUSIONS. --------------------------------------------------------------------------------- PP2011-1773/ Description: ----------- The underlying directories contain all of the input and output files for the simulations described in the report as well as the MODFLOW and MODFLOW-ASP source codes and supporting data files. Descriptions of the data in each subdirectory are given to facilitate understanding of this model archive. Files descriptions are provided for select files to provide additional information that may be of use for understanding this model archive. The model was developed using a modified version of MODFLOW-2000 that is coupled to GMS (Ground-Water Modeling System) and PEST. GMS and PEST are not included in this archive. Two versions of the MODFLOW code are contained in this archive--a modified version and an unmodified version. An unmodified verion of MODFLOW-2000 was used--version 1.17.02. A modified version of MODFLOW was provided by John Doherty as part of the PEST software. This version is called MODFLOW-ASP. A documentation file for MODFLOW-ASP is included. The ASP change that is important related to this archive is the INTERP option. INTERP can be used to modify the way array values are computed for additive parameters The model was developed on a personal computer platform using MS-Windows XP operating system in 2004-2007. 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 complete model documentation report (https://pubs.er.usgs.gov/publication/pp1773) to understand the purpose, construction, and limitations of this model. Reconstructing the model archive from the online data release: ------------------------------------------------------------- The model archive is available as a data release from: http://dx.doi.org/10.5066/F7RJ4GJF The models will run successfully only if the directory structure is correctly restored. The model archive is broken into several pieces to reduce the likelihood of download timeouts. Small files (readme.txt and modelgeoref.txt) are available as uncompressed files. All other files are zipped at the subdirectory level. For example, the files in the "georef" subdirectory are zipped into a zip file named "georef.zip". All zip files should be unzipped into a directory with the same name as the zip file name without the .zip extension. The highest-level directory structure of the original model archive is: PP2011-1773/ ancillary/ bin/ georef/ model/ output/ source/ The full directory structure of the model archive and the files within each subdirectory are listed below. Running the model(s): -------------------- Two simulations are included in this archive. When MODFLOW-2000 or MODFLOW-ASP is executed, a single prompt is issued for the name file that specifies the input files to be used in the simulation, as well as, the output files that are created. Responding to this prompt with the name file listed below will initiate the corresponding simulation. The simulations that are documented can be run by opening a command line/terminal in the model subdirectory and typing: ../bin/mf2k.exe .nam ../bin/mf2kasp.exe .nam Summary of the simulations --------------------------- SIMULATIONS DESCRIPTION OF SIMULATION TIME PERIOD SIMULATED 1-23-07_ASP Transient condition using 1900-2004 the modified version of MODFLOW that allows interpolated gridded values of hydraulic conductivity 1-23-07_NOASP Transient conditions using 1900-2004 the standard version of MODFLOW that uses the interpolated gridded values of hydraulic conductivity saved by the MODFLOW-ASP simulation. Files: ----- readme.txt : This file documents the structure, directories and files, and instructions on how to run the model of the data release. modelgeoref.txt : ASCII file with the four corners of the model domain. ancillary/ Description: ----------- This directory contains ancillary data including data files used in model calibration, construction, and analysis. The links to GIS shapefiles of the tops of the 16 model layers and picks data use used to compile the hydrostratigraphic data are included. Hydrograph separation information, and water-table altitude estimation data also are included. Files: ----- ofr2006-1298.pdf--The Adobe Acrobat format file of a data report that was prepared as part of the project. This report includes some of the more important wells used in the model but does not include all of these well used in the model. /Data files - Description ----------- Data files include hydraulic conductivity and water-level files used in model calibration. All horizontal coordinate information in the data files are referenced to the North American Datum of 1983 (NAD 83). /Hydraulic conductivity Description ----------- Horizontal hydraulic conductivities are calibrated using the PEST pilot point method. Some of the HK used are actual values derived from aquifer tests but others are pilot points that fill in spatial gaps with the values being derived from the model calibration process. /Water use - Description ----------- Water-use data includes well and water-use files for each layer. The well files contain well identification, State-plane Easting and Northing coordinates, and layer number. The water use (WU) files contain well identification, date, time, and pumping rate (in cubic feet per day (CFD)) for each well. The data was complied from various sources including the SC Dept of Health and Environmental Control water-use database, data from the Savannah River Site, data from The USGS Georgia water-use data- base, data from the NC Division of Water Resources, and data from the USGS Virginia water-use database /Water levels - Description ----------- Water-level elevation data for all of the South Carolina data were calculated using the National Elevation Dataset (NED) for land surface and depth to water below land surface from GWSI. The datum was NGVD 1929. Georgia and North Carolina water- level data included water-level elevations taken directly from previously published reports (NGVD 1929) and from GWSI. a. 2004 b. 1980-82 c. Predevelopment d. Continuous water-level data - Continuous water-level data files include one well file and one water-level elevation file for each layer. The well files contain well identification, State-plane Easting and Northing coordinates, layer number, and standard deviation of water- level elevations used for model calibration. The water-level elevation (WLs) files contain well identification, date, time, and water-elevation (in feet NGVD 1929) for each well. /Hydrostratigrahic Data Description ----------- These data are picks on the tops of the 16 aquifers and confining units from 313 boreholes across the study area. /GIS Coverages Description ----------- The GIS data included in the original model archive has been replaced by fully documented geospatial data that is displayed on the Office of Groundwater Webpage and stored on the Water Resources NSDI Node (Water Node). Shapefiles and text files of the borehole data, hydrogeologic unit extents, and hydro- geologic unit surfaces can be accessed at: http://water.usgs.gov/ogw/gwrp/activities/gspdata/Studies/NSCCoastal.html The metadata for these shapefiles is at: http://water.usgs.gov/GIS/metadata/usgswrd/XML/pp1773_unit_alt_boreholes.xml http://water.usgs.gov/GIS/metadata/usgswrd/XML/pp1773_extents.xml http://water.usgs.gov/GIS/metadata/usgswrd/XML/pp1773_unit_alt_grid.xml /Streamflow - Hydrograph Separation Description ----------- Daily streamflow data used to calibrate the model. Baseflows were calculated using PART program (Water-Resources Investigations Report 98-4148) /Water-Table Altitude Estimation Description ----------- Data and results of a regression analysis of surficial aquifer ground-water levels from the study area that were used to determine the depth to the water table for the surficial aquifer. bin/ Description: ----------- The model was developed using a modified version of MODFLOW-2000 that is coupled to GMS (Ground-Water Modeling System) and PEST. GMS and PEST are not included in this archive. Two versions of the MODFLOW code are contained in this archive--a modified version and an unmodified version. See the Model directory of this archive for information about the simulations that use the INTERP option. The model was developed on a personal computer platform using MS-Windows XP operating system in 2004-2007. The modified version of MODFLOW was provided by John Doherty as part of the PEST software. This version is called MODFLOW-ASP. A document- ation file for MODFLOW-ASP is included. The ASP change that is important related to this archive is the INTERP option. INTERP can be used to modify the way array values are computed for additive parameters The code in directory MODFLOW2K-ASP has the ASP capability added. The various code changes to implement ASP occur in quite a few locations throughout MODFLOW. The changes to implement the INTERP option occur in files mf2k.f, glo1bas6.f, and parutl1.f. File asp.f is also added. The other options of ASP are not used for the archived simulations. The code in directory MODFLOW2K1_17_02 is standard MODFLOW-2000 version 1.17.02. This directory contains the 64-bit executables used to do the analysis documented in the report https://pubs.er.usgs.gov/publication/pp1773 Files: ----- MF2k.exe : MODFLOW2000 (version 1.17.02) 64-bit windows executable MF2kasp.exe: MODFLOW2000 modified..... 64-bit windows executable georef/ Description: ----------- This directory a shapefile defining the active and inactive areas of the model documented in the report. https://pubs.er.usgs.gov/publication/pp1773 Files: ----- PP2011_1773.dbf : PP2011_1773.dbf is part of the PP2011_1773 shapefile PP2011_1773.prj : PP2011_1773.prj is part of the PP2011_1773 PP2011_1773.shp : PP2011_1773.shp is part of the PP2011_1773 shapefile PP2011_1773.shx : PP2011_1773.shx is part of the PP2011_1773 shapefile model/ Description: ----------- These are the input files for the MODFLOW-2000 ground-water flow model documented in USGS Professional Paper 1773. https://pubs.er.usgs.gov/publication/pp1773 The files are for a final simulation after calibration, and PEST is not used for this final simulation. Input files in directory MODFLOW-ASP use a modified version of MODFLOW described in the Source directory. This is the way the model was run when PEST performed model calibration. In particular, a capability of MODFLOW-ASP for interpolating gridded values of hydraulic conductivity from parameters is used that is not part of standard MODFLOW. The Name file for this simulation is 1-23-07_ASP.nam Input files in directory StandardMODFLOW use the standard version of MODFLOW described in the Source directory. This avoids the need for data interpolation used in the MODFLOW-ASP simulation. The interpolation is avoided by directly reading interpolated hydraulic conductivity values saved by the MODFLOW-ASP simulation. The MODFLOW Name file for this simulation is 1-23-07_NOASP.nam. This change requires a modified Name file, LPF File, and Multiplier file. The hydraulic conductivities are in files HK1.DAT, HK2.DAT, ..., HK16.DAT. Files: ----- None externalfiles/ Description: ----------- This directory contains the shared or common files used to run the simulations documented in the report https://pubs.er.usgs.gov/publication/pp1773 Files: ----- 1-23-07.chd: Boundary heads 1-23-07.dis: Discretization file 1-23-07.gmg: Solver package 1-23-07.hob: Head observation package file 1-23-07.obs: Prefix name for the observation files 1-23-07.oc: Output control file 1-23-07.rch: Recharge package 1-23-07.riv: River package 1-23-07.rvob: River observation package file 1-23-07.wel: well package MODFLOW_ASP/ Description: ----------- This directory contains the MODFLOW_ASP name file and all of the input files used to run the simulation documented in the report. https://pubs.er.usgs.gov/publication/pp1773 Files: ----- 1-23-07_ASP.nam: MODFLOW name file that contains input and output files for the ASP simulation 1-23-07.snn_1: Sensitivity input data 1-23-07.mlt: Input array to define multipliers 1-23-07.zon: Zone package file 1-23-07.lpf: Layer-property-flow package 1-23-07.ba6: Basic package file 1-23-07.asp_1: ASP data usgs.model.reference : temporal and spatial reference for the regional model StandardMODFLOW/ Description: ----------- This directory contains the MODFLOW2000 file and all of the input files used to run the simulation documented in the report. https://pubs.er.usgs.gov/publication/pp1773 Files: ----- 1-2307_NOASP.nam: MODFLOW name file that contains input and output files for the simulation 1-23-07_NOASP.snn: Sensitivity input data 1-23-07_NOASP.mlt: Input array to define multipliers 1-23-07.zon: Zone package file 1-23-07_NOASP.lpf: Layer-property-flow package 1-23-07.ba6: Basic package file HK#.Dat:Hydraulic conductivity for the # model layer usgs.model.reference : temporal and spatial reference for the regional model output/ Description: ----------- These are the output files from the MODFLOW-2000 ground-water flow model documented in USGS Professional Paper 1773. https://pubs.er.usgs.gov/publication/pp1773 The files are from the model after calibration, so PEST is not used for this final simulation. Output files in directory MODFLOW-ASP use a modified version of MODFLOW described in the Source directory. Output files in directory StandardMODFLOW use the standard version of MODFLOW described in the Source directory. The output from both simulations are essentially the same. The minor differences are caused by minor differences in hydraulic counductivity. The MODFLOW-ASP simulation uses interpolated hydraulic conductivity values directly computed by MODFLOW-ASP. The standard MODFLOW simulation uses hydraulic conductivity values that were saved from a MODFLOW-ASP simulation. The process of saving the values and reading them again causes a minor change in the values. Files: ----- None output.MODFLOW-ASP/ Description: ----------- This directory contains all of the output files for the MODFLOW-ASP model run documented in the report. https://pubs.er.usgs.gov/publication/pp1773 Files: ----- 1-23-07_ASP.ccf: Output of cell-by-cell model budget 1-23-07_ASP.hed: Output of simulated heads 1-23-07_ASP.glo: Summary output of MODFLOW run 1-23-07._nm: Weighted residuals and probability plotting positions 1-23-07._os: Unweighted simulated equivalents and observed or prior values 1-23-07._r: Unweighted residuals 1-23-07._w: Weighted residuals for observations and prior information 1-23-07._ws: Simulated equivalents and weighted residuals 1-23-07._ww: Weighted simulated equivalents and weighted observations or prior information output.StandardMODFLOW/ Description: ----------- This directory contains all of the output files for the standard MODFLOW2000 run documented in the report https://pubs.er.usgs.gov/publication/pp1773 Files: ----- 1-23-07_NOASP.ccf: Output of cell-by-cell model budget 1-23-07_NOASP.hed: Output of simulated heads 1-23-07_NOASP.glo: Summary output of MODFLOW run 1-23-07._nm: Weighted residuals and probability plotting positions 1-23-07._os: Unweighted simulated equivalents and observed or prior values 1-23-07._r: Unweighted residuals 1-23-07._w: Weighted residuals for observations and prior information 1-23-07._ws: Simulated equivalents and weighted residuals 1-23-07._ww: Weighted simulated equivalents and weighted observations or prior information source/ Description: ----------- The model was developed using a modified version of MODFLOW-2000 that is coupled to GMS (Ground-Water Modeling System) and PEST. GMS and PEST are not included in this archive. Two versions of the MODFLOW code are contained in this archive--a modified version and an unmodified version. The model was developed on a personal computer platform using MS-Windows XP operating system in 2004-2007. The modified version of MODFLOW was provided by John Doherty as part of the PEST software. This version is called MODFLOW-ASP. A documentation file for MODFLOW-ASP is included. The ASP change that is important related to this archive is the INTERP option. INTERP can be used to modify the way array values are computed for additive parameters The code in directory MODFLOW2K-ASP has the ASP capability added. The various code changes to implement ASP occur in quite a few locations throughout MODFLOW. The changes to implement the INTERP option occur in files mf2k.f, glo1bas6.f, and parutl1.f. File asp.f is also added. The other options of ASP are not used for the archived simulations. The code in directory MODFLOW2K1_17_02 is standard MODFLOW-2000 version 1.17.02. Files: ----- modflow-asp.pdf: The documentation for the MODFLOW-ASP code.