Sediment size dataset for Australia

<p>This repository contains a dataset of median grain size (d50) for the Australian coastline.</p> <p>The sediment samples were collected by <a href="https://www.sydney.edu.au/science/about/our-people/academic-staff/andrew-short.html">Professor Andrew D. Short</a> during field campaigns between 1979 and 1999. This dataset includes all&nbsp;the <em>sand</em> samples collected in the <em>swash zone</em><em>.&nbsp;</em>More information about this dataset can be found in&nbsp;<a href="https://link.springer.com/book/10.1007/978-3-030-14294-0#bibliographic-information">Australian Coastal Systems book</a>. The beach sand sample collection is physically stored at Geoscience Australia (Canberra) and can be viewed by contacting&nbsp;<a href="mailto:AusGeoSamples@ga.gov.au">AusGeoSamples@ga.gov.au</a>.</p> <p><strong>Dataset description</strong></p> <p>The data is contained in the file&nbsp;<strong>Australia_dataset.geojson</strong>. This geospatial layer contains a linestring for each individual beach/embayment. The&nbsp;coordinate system of the geospatial layer is&nbsp;WGS84.<br> <br> This&nbsp;geospatial layer matches and complements the Australian beach-face slope dataset published here&nbsp;<a href="https://doi.org/10.5281/zenodo.5606216">https://doi.org/10.5281/zenodo.5606216</a>&nbsp;and described in&nbsp;<em><a href="https://doi.org/10.5194/essd-14-1345-2022">Vos et al. 2022</a>. Note that not every beach in the layer contains a sediment size value.</em></p> <p>Each feature has the following attributes:</p> <p><strong>Grain-size and location attributes</strong><br> &nbsp; - <em>d50</em>: Median grain-size in millimetres. Obtained by sieving the sand samples. The original sand samples were donated to Geoscience Australia.<br> &nbsp; -&nbsp;<em>beach_id</em>: Database id for each beach,&nbsp;e.g., aus0001, aus0002, &hellip;, aus5255 (same as in <a href="http://doi.org/10.5281/zenodo.5606216">Vos et al. 2022</a>),<br> &nbsp; -&nbsp;<em>ABSAMP_id</em>:&nbsp;id of the sample in&nbsp;the ABSAMP database,&nbsp;e.g., nsw0001, tas001, qld001 etc.&nbsp;See the&nbsp;<a href="https://ecat.ga.gov.au/geonetwork/srv/api/records/d14b2b5b-332d-4e8f-b732-3d01a06866b2">Smartline</a>&nbsp;from Geoscience Australia for the location of each id.<br> &nbsp; - <em>distance_to_sample</em>: Distance in metres between the linestring in the ABSAMP database and the linestring in this layer.<br> &nbsp; - <em>latitude</em>: Latitude of the centroid of the beach in WGS84.<br> &nbsp; - <em>longitude</em>: Longitude of the centroid of the beach in WGS84.<br> &nbsp; -&nbsp;<em>beach_length</em>: Length of the beach or embayment, very long beaches (&gt;50km) were split to optimise memory usage.<br> &nbsp;&nbsp;-&nbsp;<em>coastal_region</em>: Database id corresponding to the 23 coastal regions as identified by <a href="https://www.sciencedirect.com/science/article/pii/S0964569117306129">Thom et al. (2018)</a>.<br> &nbsp;&nbsp;-&nbsp;<em>primary_comp_id</em>: Database id corresponding to the 100 primary sediment compartments as identified by <a href="https://www.sciencedirect.com/science/article/pii/S0964569117306129">Thom et al. (2018)</a>.<br> &nbsp;&nbsp;-&nbsp;<em>secondary_comp_id</em>: Database id corresponding &nbsp;to the 361 secondary sediment Compartments as identified by <a href="https://www.sciencedirect.com/science/article/pii/S0964569117306129">Thom et al. (2018)</a>.</p> <p><strong>Wave climate and tide range&nbsp;attributes</strong><br> &nbsp; - Hs<em>_mean</em>: Mean Significant Wave Height at&nbsp;the closest grid point in the ERA5 re-analysis dataset (computed using 6-hourly time-series between 2010 and 2020).<br> &nbsp; - Hs<em>_max</em>: Max Significant Wave Height at&nbsp;the closest grid point in the ERA5 re-analysis dataset (computed using 6-hourly time-series between 2010 and 2020).<br> &nbsp; -&nbsp;<em>Tp_mean</em>: Mean Peak Wave Period at&nbsp;the closest grid point in the ERA5 re-analysis dataset (computed using 6-hourly time-series between 2010 and 2020).<br> &nbsp; -&nbsp;<em>Wdir_mean</em>: Mean Wave Direction at&nbsp;the closest grid point in the ERA5 re-analysis dataset (computed using 6-hourly time-series between 2010 and 2020).<br> &nbsp; -&nbsp;<em>Wdir_weighted_average</em>: More robust estimator of the Mean Wave Direction obtained by computing the average wave direction weighted by wave energy flux.<br> &nbsp; -&nbsp;<em>hsig_median</em>: Median Significant Wave Height from the closest grid point in the CAWCR re-analysis dataset<br> &nbsp; -&nbsp;<em>mstr</em>: Mean Spring Tide Range at the beach calculated from the closest grid point in the FES2014 global tide model</p> <p><strong>Beach-face slope attributes (same as in&nbsp;<a href="http://doi.org/10.5281/zenodo.5606216">Vos et al. 2022</a>)</strong><br> &nbsp;&nbsp;-&nbsp;<em>beach_slope_average</em>: Average of the beach-face slope at the site, weighted by the width of the confidence bands, value between 0.01 and 0.2<br> &nbsp;&nbsp;-&nbsp;<em>width_ci_average</em>: Average width of confidence band over the comprised transects, value between 0 and 0.19<br> &nbsp;&nbsp;-&nbsp;<em>quality_flag</em>:&nbsp;Quality flag indicating the confidence in the slope estimate at this transect&nbsp;(High, Medium or Low)<br> &nbsp; -&nbsp;<em>prc_msrt_obs</em>: percentage of the Mean Spring Tide Range observed by the satellite-derived shorelines<br> &nbsp; -&nbsp;<em>min_tide_obs</em>: Lowest tide level observed by the satellite-derived shorelines<br> &nbsp; -&nbsp;<em>max_tide_obs</em>: Highest tide level observed by the satellite-derived shorelines<br> &nbsp;&nbsp;-&nbsp;<em>sl_points_average</em>: Average number of datapoints in the shoreline time-series over the comprised transects</p>