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

This repository contains 35 years of tidally-corrected shoreline change data at the Klamath River Littoral Cell in northern California. This dataset was used in <em>Warrick et al. 2023, "</em><strong>A Large Sediment Accretion Wave Along a Northern California Littoral Cell</strong>"<em>, </em>to investigate and track the movement of a large sediment wave. <em>CoastSat </em>was used to map shoreline changes on Landsat 5, Landsat 7 and Landsat 8 imagery between 1984 and 2022. The <em>Coastsat </em>toolbox is publicly available at https://github.com/kvos/CoastSat and described in <em>Vos et al. 2019, </em>https://doi.org/10.1016/j.envsoft.2019.104528. 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 <em>Vos et al. 2020, "Beach slopes from satellite-derived shorelines", </em>https://doi.org/10.1029/2020GL088365<em>)</em>. The data is located in the <em>/shoreline_data</em> folder and structured as follows: The littoral cell is divided in 4 sections (kmt_01, kmt_02, kmt_03, kmt_04) For each section there is a folder with 4 CSV files: <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 etc). This is the final product used for coastal change analyses. <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. <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+). <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. In addition, there are 3 geospatial layers (.GEOJSON) which contain important spatial information. All the geospatial layers are in EPSG:2163 - US National Atlas Equal Area: <em>Klamath_polygons.geojson</em>: this layer contains the polygons that were used to run CoastSat for each section of the littoral cell. <em>Klamath_shorelines.geojson</em>: this layer contains the sandy shorelines that were used to generate the cross-shore transects (also used as reference shorelines in CoastSat). <em>transects.geojson</em>: this layer contains the cross-shore transects, which are spaced 100 m alongshore. Finally, in the<em> /animations</em> folder, there is a clip showing the mapped shorelines on the satellite imagery.