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Flood-Inundation Shapefile for Dardenne Creek Backwater, St. Charles County, Missouri, 2019

Metadata Updated: July 6, 2024

Digital flood-inundation maps for a 9.9-mile reach of Dardenne Creek, St. Charles County, Missouri, were created by the U.S. Geological Survey (USGS) in cooperation with St. Charles County, Missouri Department of Transportation, and the cities of O'Fallon and St. Peters, Missouri. The flood-inundation maps, which can be accessed through the USGS Flood Inundation Mapping Science Program at , depict estimates of the areal extent and depth of flooding corresponding to select water levels (stages) at the USGS streamgages 05514860 Dardenne Creek at Old Town St. Peters, Missouri, and 05587450 Mississippi River at Grafton, Illinois. Near-real-time stages at these streamgages may be obtained from the USGS National Water Information System database at or the National Weather Service Advanced Hydrologic Prediction Service at (USGS streamgage 05514860) and (USGS streamgage 05587450), which also forecasts flood hydrographs at these sites. Flood profiles were computed for the Dardenne Creek stream reach by means of a one-dimensional model for simulation of water-surface profiles with steady-state flow computations. The model was calibrated using the current stage-discharge relation at the USGS streamgages 05514840 Dardenne Creek at O’Fallon, Missouri, and 05514860 Dardenne Creek at St. Peters, Missouri, and documented high-water marks from the flood of December 2015. Stages in the lower Dardenne Creek can be influenced by backwater from the Mississippi River, therefore, 23 sets of water-surface profiles ranging from 18 ft to 40 ft were developed and referenced to USGS streamgage 05587450 Mississippi River at Grafton, Illinois. The upper stage for each map library exceeds the stage corresponding to the estimated 0.2-percent annual exceedance probability flood (500-year recurrence interval flood) at the streamgage locations. The simulated water-surface profiles were then combined with a geographic information system digital elevation model (derived from light detection and ranging (lidar) data having a 0.26-ft vertical accuracy and 0.71-ft horizontal resolution) to delineate the area flooded at each water level. The availability of these maps, along with information regarding current stage from the USGS streamgages and forecasted high-flow stages from the National Weather Service, will provide emergency management personnel and residents with information that is critical for flood mitigation, preparedness and planning, flood-response activities such as evacuations and road closures, as well as for post-flood recovery efforts. The data are provided in the Environmental Systems Research Institute (ESRI) shapefile format compressed into a zip archive that is named

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Identifier USGS:5e710d1ae4b01d50926822ad
Data Last Modified 20200813
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 368fa67d-53b0-4ddc-b13c-49864cb86395
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -90.651,38.7688,-90.6192,38.8139
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 25e7e0464a4d7f45fbaf21a1d43c4a286d43611836c4024d974efa4052de8a38
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -90.651, 38.7688, -90.651, 38.8139, -90.6192, 38.8139, -90.6192, 38.7688, -90.651, 38.7688}

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