Time-series of shoreline change for the Klamath River Littoral Cell (California)

<p>This repository contains 35&nbsp;years of tidally-corrected shoreline change data at the Klamath River Littoral Cell in northern California. This dataset was used&nbsp;in&nbsp;<em>Warrick et al. 2023, &quot;</em><strong>A Large Sediment Accretion Wave Along a Northern California Littoral Cell</strong>&quot;<em>,&nbsp;</em>to investigate and track the movement of a large sediment wave.</p> <p><em>CoastSat&nbsp;</em>was used to map shoreline changes on Landsat 5, Landsat 7 and Landsat 8 imagery between 1984 and 2022. The&nbsp;<em>Coastsat&nbsp;</em>toolbox is publicly available at&nbsp;https://github.com/kvos/CoastSat and described in&nbsp;<em>Vos et al. 2019,&nbsp;</em><a href="https://doi.org/10.1016/j.envsoft.2019.104528">https://doi.org/10.1016/j.envsoft.2019.104528</a>.&nbsp;The time-series of shoreline change were tidally-corrected along cross-shore transects using tide levels from a global tide model (FES2014) and a satellite-derived estimate of the beach slope (as described in&nbsp;<em>Vos et al. 2020, &quot;Beach slopes from satellite-derived shorelines&quot;,&nbsp;</em><a href="https://doi.org/10.1029/2020GL088365">https://doi.org/10.1029/2020GL088365</a><em>)</em>.</p> <p>The data is located in the <em>/shoreline_data</em> folder and structured as follows:</p> <ul> <li>The littoral cell is divided in 4 sections (kmt_01, kmt_02, kmt_03, kmt_04)</li> <li>For each section there is a&nbsp;folder with 4 CSV files: <ul> <li><em>time_series_tidally_corrected.csv</em>: this file contains the tidally-corrected time-series of shoreline change along each transect belonging to the site (e.g. kmt01-000, kmt01-001&nbsp;etc). This is the final product used for&nbsp;coastal change analyses.</li> <li><em>time_series_raw.csv</em>: this file contains the raw time-series of shoreline change, which have not be tidally-corrected. Note that each image is taken at a different stage of the tide.</li> <li><em>tide_levels_fes2014</em>: this file contains the tide levels at the time of image acquisition extracted from FES2014 (global tide model publicly available on AVISO+).</li> <li><em>transect_coordinates_and_beach_slopes.csv</em>: this file contains the coordinates (in WGS84 lat/lon coordinates) as well as the estimated beach slope for each transect.</li> </ul> </li> </ul> <p>In addition, there are 3 geospatial layers (.GEOJSON) which contain important spatial information. All the geospatial layers are in&nbsp;EPSG:2163 - US National Atlas Equal Area:</p> <ul> <li>&nbsp;<em>Klamath_polygons.geojson</em>: this layer contains the polygons that were used to run CoastSat for each section of the littoral cell.</li> <li><em>Klamath_shorelines.geojson</em>: this layer contains the sandy shorelines that were used to generate the cross-shore transects (also&nbsp;used as reference shorelines in CoastSat).</li> <li><em>transects.geojson</em>: this layer contains the cross-shore transects, which are spaced 100 m alongshore.</li> </ul> <p>Finally, in the<em> /animations</em> folder, there is a clip showing the mapped shorelines on the satellite imagery.</p>