Data supporting "Variability of geomechanical properties across sandy beaches and their possible impacts on erodibility" by Stark et al.

This data repository contains data used in the manuscript “Variability of geomechanical properties across sandy beaches and their possible impacts on erodibility” by Stark et al. The data was collected at the sandy Atlantic beach at the U.S. Army Corps of Engineers field research facility in Duck, North Carolina, USA, during two field campaigns in March 2023 and in November 2023. The data set includes: · Topobathy measurements were obtained from the regular lidar and RTK surveying services by the U.S. Army Corps of Engineers Field Research Facility data collections. Beach dune lidar data of the relevant area are available here: https://chldata.erdc.dren.mil/thredds/catalog/frf/geomorphology/elevationTransects/duneLidarTransect/2023/catalog.html . RTK survey data is available here: https://chldata.erdc.dren.mil/thredds/catalog/frf/geomorphology/elevationTransects/survey/data/catalog.html Topobathy data was used for assessment of geomorphodynamics as shown in the Fig.1 of the manuscript. · Median grain size. Grain size distributions were measured from surface sampling and subsequent sieve analysis. The data includes representative cross-shore profiles from the Spring (grainsize-Spring.csv) and Fall (grainsize-Fall.csv) experiment, respectively. The data analysis is provided as grainsizetoUcrit.ipynb). The data is shown in the manuscript in Fig. 3 and in text. · Pore pressure measurements. The instruments used were two RBRSolo wave gages by RBR. They were installed on a vertical stack with one (RBRSolo-top.rsk) deployed at 10 cm sediment depth and one (RBRSolo-bottom.rsk) deployed at 25 cm of sediment depth from March 17-26, 2023 as described by Hummel et al. (2024). The data analysis and code is provided as well (RBR-GRL.ipynb). The data is being displayed in a processed manner in Figure 4 and in text of the manuscript. · Portable free fall penetrometer data. The instrument used was a BlueDrop portable free fall penetrometer by BlueCDesigns. The probe was deployed and analyzed following Brilli and Stark (2024) to estimate relative density of the sand as defined as the ratio of the maximum void ratio of the sand minus the actual void ratio of the sand over the maximum void ratio minus the minimum void ratio of the sand. The folder contains data collected on March 8 along transect Q as described in Hummel et al. (2024). This data is used in text in the discussion about changes in relative density across the shore. The data includes raw files (bLogXXXX.bin) as well as a summary table (PFFP-Mar8-TransectQ.csv). · Numerical modeling input parameters. XBeach numerical modeling results are presented using a standard XBeach set up and the bermslope configuration. The input parameters are provided in XBeach-param-stand.txt and XBeach-params-bermslope.txt References Brilli, N. C., & Stark, N. (2024). Challenges in the measurement of cross-shore geotechnical characteristics of sandy beach surface sediments. Coastal Engineering, 191, 104535. https://doi.org/10.1016/j.coastaleng.2024.104535 Hummel, E., Stark, N., Zhang, J., Hsu, T. J., & Hubler, J. A (2024). Field Observation Framework for Concurrent Measurement of Surf Zone Hydrodynamics, Morphodynamics, and Geotechnical Properties. In Geo-Congress 2024, 491-500. https://doi.org/10.1061/9780784485316.051