Michael Itzkin Margaret L. Palmsten Mark L. Buckley 20250402 tabular digital data Michael Itzkin Stefano Conti Margaret L. Palmsten Kristen D. Splinter Mark L. Buckley 20250402 U.S. Geological Survey data release doi:10.5066/P137WIC8 St. Petersburg, FL U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center https://doi.org/10.5066/P137WIC8 In 2023, Conti and others (2024a) ran a series of flume experiments to investigate the effect of moisture content on dune erosion. In this study, the flume setup was used from Conti and others (2024b) to assess the role of offshore sandbar morphology on regulating wave runup at the shoreline and hydrodynamics in the nearshore. A hindcast of the Conti and others (2024a) flume experiment was performed using the Simulating Waves Till Shore (SWASH; Zijlema and others, 2011). A series of synthetic flume profiles were then derived with modified bar morphologies and used as a boundary condition for additional SWASH simulations. SWASH requires a beach profile as a boundary condition and wave forcing conditions. The JONSWAP spectrum from the physical flume experiment (Conti and others, 2024b) was used to force the model on the profiles in this dataset. This data release contains two sets (reflective and dissipative) of synthesized barred beach profiles based on conditions in the University of New South Wales Water Research Laboratory's 0.9-meter (m) wave flume. Each set of profiles contain a barless version to allow comparisons between barred and planar beaches. These data were generated to run SWASH simulations analyzing how different sandbar morphologies affect nearshore hydrodynamics and wave runup. The data file, dissipative_profiles.csv, is a comma-separated values (csv) file containing the cross-shore (X) and elevation values for each profile. 20250402 publication date Complete None planned 151.256639 151.256639 -33.780667 -33.780667 USGS Metadata Identifier USGS:7c511136-7ead-4bf9-ad91-df80970e34ee ISO 19115 Topic Category oceans USGS Thesaurus hydrographic datasets ocean waves hazards ocean processes None U.S. Geological Survey USGS St. Petersburg Coastal and Marine Science Center SPCMSC Common Geographic Areas Australia No access constraints. Please see 'Distribution Information' for details. These data are marked with a Creative Common CC0 1.0 Universal License. These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Michael Itzkin Research Geologist Mailing and physical

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St. Petersburg FL 33701 United States 727-502-8131 mitzkin@usgs.gov This dataset was created in collaboration between the U.S. Geological Survey and the University of New South Wales. Environment as of Metadata Creation: Microsoft Windows 11 Enterprise version 23H2; Microsoft Excel version 2402; SWASH version 9.01A. Conti, S., Splinter, K.D., Booth, E., Djadjiguna, D., and Turner, I.L. 20241001 Geomorphology Volume 462 2024a https://doi.org/10.1016/j.geomorph.2024.109331 Zijlema, M., Stelling, G., and Smit, P. 20110531 Coastal Engineering Volume 58, Issue 10 Pages 992-1012 https://doi.org/10.1016/j.coastaleng.2011.05.015 Stephens, S.A., Coco, G., and Bryan, K.R. 20101020 Journal of Waterway, Port, Coastal, and Ocean Engineering Volume 137, Issue 4 https://doi.org/10.1061/(ASCE)WW.1943-5460.0000076 Ruessink, B.G., Wijnberg, K.M., Holman, R.A., Kuriyama, Y., and Van Enckevort, I.M.J. 20030805 Journal of Geophysical Research: Oceans Volume 108, Issue C8 https://doi.org/10.1029/2002JC001505 The 217 synthetic dissipative beach profiles are provided with a cross-shore spacing (dx) of 0.04 m. These are the complete model inputs for the dissipative SWASH simulations. 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. Horizontal positions are on a local coordinate system with an accuracy of 25 millimeters (mm). Vertical positions are on a local coordinate system with an accuracy of 25 mm. Conti, S., Splinter, K., Booth, E., Djadjiguna, D., and Turner, I.L. 20240320 1.0 tabular digital data and video Sydney NSW, Australia University of New South Wales https://doi.org/10.17632/mbyctv39mr.1 .txt and .mp4 20240320 publication date Conti and others (2024b) The "Dune and Foreshore Profile Data" and the "Bathymetric Data" files available in this data release were used to develop the synthetic profiles used in this dataset as well as to provide an input profile for the SWASH hindcast that was used for model validation. The initial beach profile found in Conti and others (2024b) was scanned using a Sensor Intelligence® SICK LMS111 LiDAR sensor. The profiles in this dataset were then created by replacing the subaqueous profile with a synthetic profile defined using the piecewise relationships for barred profiles in Stephens and others (2010) and following the relationship between bar size and depth described in Russeink and others (2003). The subaerial portion of the profile was created by extending a linear profile from the trough of the bar through the shoreline and up to an elevation of 1.35 meters to match the initial profile elevation. The naming convention for the bars is 'BAR{position}{width}L{height}' where {position} increases offshore from 14 to 49 (1.4 meters from the shoreline to 4.9 meters from the shoreline), {height} increases from SL to 0L to B1 to B2 to B3, and {width} increases from S2 to S1 to L0 to B1 to B2. 216 profiles that contain a sandbar were produced by repeating the above methodology for all combinations of bar positions, bar widths, and bar heights. An additional, barless, profile was made using an exponential curve for the subaqueous portion of the profile. Conti and others (2024b) 2024 disspative_profiles.csv Michael Itzkin U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center Research Geologist mailing and physical

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St. Petersburg FL 33701 United States 727-502-8131 mitzkin@usgs.gov dissipative_profiles.csv Comma-separated values (.csv) of the 217 dissipative cross-shore profiles (216 profiles are with a nearshore bar and 1 is barless). USGS X Cross-shore positional grid for the profiles. USGS -21.05 14.75 meters 0.01 BAR{position}{width}L{height} Elevation values for the 216 synthetic profiles with a nearshore bar. The profiles are labelled the following: 'BAR{position}{width}L{height}'. The {position} value is a numeric value that corresponds to the distance of the bar crest from the shoreline (in meters) multiplied by 10 (i.e., 14 = 1.4 m from the shoreline). The {width} values increase from S2 to S1 to L0 (original width) to B1 to B2. The {height} values increase from S2 to S1 to L0 (original height) to B1 to B2 to B3. All profiles have an elevation range of 0 meters to 1.35 meters. USGS 0.00 1.35 meters 0.01 Barless Elevation values for the barless synthetic profile. USGS 0.00 1.35 meters 0.001 U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center USGS SPCMSC Data Management mailing and physical

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St. Petersburg FL 33701 United States 727-502-8000 gs-g-spcmsc_data_inquiries@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. comma-delimited text https://coastal.er.usgs.gov/data-release/doi-P137WIC8/data/Dissipative_Profiles.zip None 20250402 U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center USGS SPCMSC Data Management mailing and physical

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Saint Petersburg FL 33701 Unites States 727-502-8000 gs-g-spcmsc_data_inquiries@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998