Rangley C. Mickey Joseph W. Long David Thompson P. Soupy Dalyander Nathaniel Plant 20170216 raster digital data U.S. Geological Survey Data Release doi:10.5066/F72F7KJK St. Petersburg, FL U.S. Geological Survey https://doi.org/10.5066/F72F7KJK The numerical model XBeach (version 4937) was used to investigate how different storm scenarios impact the sediment berm constructed offshore of the Chandeleur Islands and adjacent areas. The XBeach model solves coupled 2-dimensional, horizontal wave propagation equations to predict flow, sediment transport, and bottom changes for varying spectral wave and flow boundary conditions (Roelvink and others, 2009 ). The XBeach model setup requires the input of a merged topographic and bathymetric DEM, and inputs of wave spectra (based on significant wave height, peak wave period, and wave direction) and water level (tide and surge) time series at the seaward model boundary that span the duration of each storm bin. The Xbeach model input and output of topography and bathymetry resulting from simulation of storm-impact scenarios at the Chandeleur Islands, LA, as described in USGS Open-File Report 2017–1009 are provided via a USGS data release (storm scenario bins where no events were observed are excluded). For further information regarding model input generation and visualization of model output topography and bathymetry, refer to Mickey and others (2017). These data were generated from the XBeach model to indicate how an idealized berm structure would evolve under varying magnitudes of storm conditions. Storm_Scenario_2.zip, is a dataset consisting of Federal Geographic Data Committee (FGDC) metadata and a NetCDF file containing the following variables: coordinates of the model grid (Easting and Northing); the final bathymetry/topography model grid for Scenario 2 (zend_2). 20160910 ground condition complete As needed -88.8654564994 -88.7366845091 30.0633577357 29.7867685543 USGS Metadata Identifier USGS:536657b8-9c98-4895-9900-9f25ffa7e1fe none U.S. Geological Survey USGS St. Petersburg Coastal and Marine Science Center SPCMSC waves tide surge morphologic change digital elevation model DEM storm impact estuaries coastal ISO 19115 Topic Category oceans elevation geoscientific Information USGS Thesaurus marine geology geomorphology topography bathymetry marine sediment transport Geographic Names Information System (GNIS) Content Gulf of Mexico Louisiana North America United States Chandeleur Islands None. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. U.S. Geological Survey, USGS Southeast Area Rangley Mickey Research III Mailing

600 4th Street South

St. Petersburg FL 33701 US 727-502-8115 727-502-8001 rmickey@usgs.gov U.S. Geological Survey Microsoft Windows 7 Enterprise; MATLAB R2015a Roelvink, D., Reniers, A., van Dongeren, A., van Thiel de Vries, J., McCall, R., and Lescinski, J. 20090915 Coastal Engineering Volume 56, Issues 11–12, November–December 2009, pg. 1133-1152 https://doi.org/10.1016/j.coastaleng.2009.08.006 Mickey, R.C., Long, J.W., Thompson, D.M., Plant, N.G., Dalyander, P.S. 2017 U.S. Geological Survey Open-File Report 2017-1009 https://doi.org/10.3133/ofr20171009 The resultant DEM from Scenario 2 indicates topographic and bathymetric elevations in all model grid cells. This DEM contains the complete resultant model grid elevation from storm-impact scenario 2. This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record carefully for additional details. This DEM contains the resultant model topographic and bathymetric elevations from storm-impact scenario 2 simulation. Within the XBeach model, the coordinates are in Universal Transverse Mercator (UTM). Vertical datum is in North American Vertical Datum of 1988 (NAVD88) with an estimated resolution of 0.01 m. The XBeach model simulates morphologic change that results from hydrodynamic impacts and sediment transport. Following the steps provided in the XBeach user manual (http://xbeach.readthedocs.io/en/latest/user_manual.html), the model was set up using a params.txt file (an example Xbeach model input file can be found in the appendix of OFR 2017-1009). Significant wave heights and peak wave periods were provided from the representative scenario binning method outlined in Mickey and others (2017). The model was then executed and the resulting topographic and bathymetric elevations, calculated at the end of each scenario, were output into an intermediary MATLAB grid (.grd format). 2016 Rangley Mickey U.S. Geological Survey Researcher III mailing and physical address

600 4th Street S

St. Petersburg FL 33701 USA (727)-502-8115 (727)-502-8001 rmickey@usgs.gov Model bathymetric and topographic outputs were extracted in Mathworks MATLAB (R2015a) with functions provided in the OpenEarth toolbox (provided by Deltares,, https://publicwiki.deltares.nl/display/OET/Tools). The resulting bathymetric and topographic elevations from the model grid were then packaged into a NetCDF file, using the export functions available in MATLAB, for inclusion in this data release. 2016 Rangley Mickey U.S. Geological Survey Researcher III mailing and physical address

600 4th Street S

St. Petersburg FL 33701 USA (727)-502-8115 (727)-502-8001 rmickey@usgs.gov Added keywords section with USGS persistent identifier as theme keyword. 20201013 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Gulf of Mexico Raster Grid Cell 1150 640 1 Universal Transverse Mercator 16 0.999600 -87.000000 0.000000 500000.000000 0.000000 Row and Column 2.5 25 meters North American Datum of 1983 Geodectic Reference System 80 6378137.0 298.25722210100002 North American Vertical Datum of 1988 0.0001 meter Attribute values The CF-compliant metadata in the header of the NetCDF file provides spatial information for projecting the data into a GIS as well as the start date and time step for the time-series of data in the file. It also provides information about the conventions used for attributes in the dataset and the source software used to create the dataset. The entity and attribute information was generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information. U.S. Geological Survey, USGS Southeast Area Rangley Mickey Researcher III mailing address

600 4th Street South

St. Petersburg FL 33701 US 727-502-8115 727-502-8001 rmickey@usgs.gov Storm_Scenario_2.nc This digital publication was prepared by an agency of the United States Government. Although these 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, nor shall the act of distribution imply 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. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. netCDF NetCDF version 4.3.3.1 Storm_Scenario_2.nc is a NetCDF file that contains the Scenario 2 resultant topographic and bathymetric elevations and coordinate information, in meters. The file is zipped and must be unzipped before use https://coastal.er.usgs.gov/data-release/doi-F72F7KJK/data/Storm_Scenario_2.zip None. 20201013 Rangley Mickey U.S. Geological Survey, USGS Southeast Area Researcher III mailing address

600 4th Street South

St. Petersburg FL 33701 US 727-502-8115 727-502-8001 rmickey@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 None None