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Coastal Carolinas Topobathymetric Model: Field Validation Data, 2021


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Irwin, J.R., Danielson, J.J., and Robbins, T.J., 2021, Coastal Carolinas Topobathymetric Model: Field Validation Data, 2021: U.S. Geological Survey data release,


U.S. Geological Survey (USGS) scientists conducted field data collection efforts between March 8th and 25th, 2021 at four sites along coastal North Carolina and South Carolina using high accuracy surveying technologies. The work was initiated as an effort to validate a topobathymetric digital elevation model (TBDEM) produced for the area that was directly impacted by Hurricane Florence in 2018. The goal was to compare the airborne lidar and sonar derived TBDEM to data collected through more traditional means (e.g. Global Navigational Satellite System (GNSS) surveying). In addition, coastal dunes were mapped with ground based lidar (GBL) for computation of dune metrics. The Hurricane Florence TBDEM will support the USGS Coastal and [...]


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The Coastal National Elevation Database (CoNED) Applications Project develops enhanced topographic (land elevation) and bathymetric (water depth) datasets that serve as valuable resources for coastal hazards research and Earth science applications. High-resolution coastal topobathymetric data is required to identify flooding, storms, and sea-level rise inundation hazard zones and other earth science applications, such as the development of sediment transport and storm surge models. CoNED was funded to produce a TBDEM of the area impacted by Hurricane Florence in September of 2018 as part of the Hurricane Florence disaster relief effort. Funding for this work came from the Supplemental Appropriations for Disaster Relief Act of 2019 (H.R. 2157) and the USGS CMHRP. CoNED produced the TBDEM using the best and most recent publicly available datasets, including airborne topographic and topobathymetric light detection and ranging (lidar) data that was collected along the Coastal Carolinas and contracted by the USGS 3D Elevation Program (3DEP) and the National Oceanic and Atmospheric Administration (NOAA) National Geodetic Survey (NGS) to support the Hurricane Florence disaster relief effort. The data that were collected during the fieldwork were used to assess the vertical accuracy of the Topobathymetric Model of the Coastal Carolinas and Georgia, 1851 to 2021 over areas in North Carolina and South Carolina, as required by the USGS storm induced flooding and sediment transport modeling teams.

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DOI doi:10.5066/P902W30G

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