Justin A. Boldt 2018 vector digital data data release https://doi.org/10.5066/F78P5ZCD Reston, Virginia U.S. Geological Survey https://doi.org/10.5066/F78P5ZCD Justin A. Boldt 2018 document Scientific Investigations Report 2017-5140 Reston, Virginia U.S. Geological Survey https://doi.org/10.3133/sir20175140 A two-dimensional model and digital flood-inundation maps were developed for a 30-mile reach of the Wabash River near the Interstate 64 (I-64) Bridge near Grayville, Illinois. The flood-inundation maps, which can be accessed through the U.S. Geological Survey (USGS) Flood Inundation Mapping Science web site at http://water.usgs.gov/osw/flood_inundation/, depict estimates of the areal extent and depth of flooding corresponding to selected water levels (stages) at the USGS streamgage on the Wabash River at Mount Carmel, Ill (USGS station number 03377500). Near-real-time stages at this streamgage may be obtained on the internet from the USGS National Water Information System at http://waterdata.usgs.gov/ or the National Weather Service (NWS) Advanced Hydrologic Prediction Service (AHPS) at http://water.weather.gov/ahps/, which also forecasts flood hydrographs at this site (NWS AHPS site MCRI2). The NWS AHPS forecasts peak stage information that may be used with the maps developed in this study to show predicted areas of flood inundation. Flood elevations were computed for the Wabash River reach by means of a two-dimensional, finite-volume numerical modeling application for river hydraulics. The hydraulic model was calibrated by using global positioning system measurements of water-surface elevation and the current stage-discharge relation at both USGS streamgage 03377500, Wabash River at Mount Carmel, Ill., and USGS streamgage 03378500, Wabash River at New Harmony, Indiana. The calibrated hydraulic model was then used to compute 27 water-surface elevations for flood stages at 1-foot (ft) intervals referenced to the streamgage datum and ranging from less than the action stage (9 ft) to the highest stage (35 ft) of the current stage-discharge rating curve. The simulated water-surface elevations were then combined with a geographic information system digital elevation model, derived from light detection and ranging data, to delineate the area flooded at each water level. The availability of these maps, along with information on the internet regarding current stage from the USGS streamgage at Mount Carmel, Ill., and forecasted stream stages from the NWS AHPS, provides emergency management personnel and residents with information that is critical for flood-response activities such as evacuations and road closures, as well as for postflood recovery efforts. This dataset was created to support the development of flood-inundation maps for a reach of the Wabash River near the Interstate 64 Bridge near Grayville, Illinois. Flood-inundation maps were created for USGS streamgage 03377500, Wabash River at Mount Carmel, Ill., which is also a NWS flood-forecast point. The maps were created in a GIS by combining the water-surface elevations and digital elevation model (DEM) data. The DEM data were derived from light detection and ranging (lidar) data. Estimated flood-inundation boundaries for each simulated profile were developed with GIS software. USGS personnel then modified the results to ensure a hydraulically reasonable transition of the boundary between modeled cross sections relative to the contour data for the land surface. The maps show estimated flood-inundated areas for each of the water-surface profiles that were generated by the hydraulic model. For more information on data processing and checking procedures, see the full report at https://doi.org/10.3133/sir20175140. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, this metadata file may include some ArcGIS-specific terminology. 2016 ground condition Complete None planned -88.0130 -87.8092 38.3460 38.1644 None flood river stream flood-inundation maps high-water marks flooded area geospatial analysis USGS Metadata Identifier USGS:597b43f2e4b0a38ca27563eb None Interstate 64 (I-64) Wabash River Grayville Wabash County White County Illinois Gibson County Posey County Indiana United States of America None. This dataset is provided by USGS as a public service. Users of this geospatial database and geologic information derived there from should acknowledge the U.S. Geological Survey as the source of the data. Users must assume responsibility to determine the appropriate use of this data. Users should be aware of the limitations of this dataset if using for critical application. U.S. Geological Survey, Indiana-Kentucky Water Science Center Justin A. Boldt Hydrologist mailing and physical address

9818 Bluegrass Parkway

Louisville Kentucky 40299 USA 502-493-1931 jboldt@usgs.gov U.S. Geological Survey, Indiana-Kentucky Water Science Center; Indiana Department of Transportation; Illinois Department of Transportation None Unclassified None Microsoft Windows 7 Enterprise 64-bit Service Pack 1; ESRI ArcMap 10.4.1 No formal attribute accuracy tests were conducted. 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 carefully for additional details. No formal positional accuracy tests were conducted. No formal positional accuracy tests were conducted. Numerical hydraulic model was used to compute water-surface profiles at selected elevations along mapped reach. The water-surface profiles were then used to generate the inundation map boundaries. 20160601 Metadata created. 20170727 Vector G-polygon 27 WGS_1984_Web_Mercator_Auxiliary_Sphere 0.000000 0.000000 0.000000 0.000000 coordinate pair 0.000001 0.000001 meters North American Datum of 1983 WGS-84 6378137.0 298.257223563 North American Vertical Datum of 1988 0.000001 feet Attribute values wabashi64.shp Flood-inundation extent area ESRI ArcMap 10.4.1 FID Internal feature number ESRI ArcMap 10.4.1 0 26 Shape Feature geometry ESRI ArcMap 10.4.1 Polygon STAGE USGS gage height associated with the flood-extent polygon, in feet ESRI ArcMap 10.4.1 9 35 ft ELEV NAVD88 elevation that correlates with the stage, in feet ESRI ArcMap 10.4.1 377.98 403.98 ft QCFS Discharge that correlates with the stage, in cubic feet per second ESRI ArcMap 10.4.1 28,400 290,000 cfs USGSID USGS station ID number ESRI ArcMap 10.4.1 03377500 GRIDID Sequential ID number for matching with depth grids ESRI ArcMap 10.4.1 09 35 U.S. Geological Survey - ScienceBase U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 USA 1-888-275-8747 sciencebase@usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication 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 may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of the data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations. shapefile https://doi.org/10.5066/F78P5ZCD None 20200827 U.S. Geological Survey, Indiana-Kentucky Water Science Center Justin A. Boldt Hydrologist mailing and physical address

9818 Bluegrass Parkway

Louisville Kentucky 40299 USA 502-493-1931 jboldt@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998