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 Warrick et al. 2023, "A Large Sediment Accretion Wave Along a Northern California Littoral Cell", to investigate and track the movement of a large sediment wave.

CoastSat was used to map shoreline changes on Landsat 5, Landsat 7 and Landsat 8 imagery between 1984 and 2022. The Coastsat toolbox is publicly available at https://github.com/kvos/CoastSat and described in Vos et al. 2019, 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 Vos et al. 2020, "Beach slopes from satellite-derived shorelines", https://doi.org/10.1029/2020GL088365).

The data is located in the /shoreline_data 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:
  • time_series_tidally_corrected.csv: 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.
  • time_series_raw.csv: 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.
  • tide_levels_fes2014: this file contains the tide levels at the time of image acquisition extracted from FES2014 (global tide model publicly available on AVISO+).
  • transect_coordinates_and_beach_slopes.csv: 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:

•  Klamath_polygons.geojson: this layer contains the polygons that were used to run CoastSat for each section of the littoral cell.
• Klamath_shorelines.geojson: this layer contains the sandy shorelines that were used to generate the cross-shore transects (also used as reference shorelines in CoastSat).
• transects.geojson: this layer contains the cross-shore transects, which are spaced 100 m alongshore.

Finally, in the /animations folder, there is a clip showing the mapped shorelines on the satellite imagery.