Vertical Land Motion as a Driver of Coastline Changes on a Deltaic System in the Colombian Caribbean

To face and properly mitigate coastal changes at a local level, it is necessary to recognize characterize the specific processes affecting coastline. Some of these are (e.g., sediment starvation), while others regional relative sea-level change) or global eustatic rise). Long tide gauge records help establish trends for region that accounts (eustatic, steric) (isostatic) changes. Local also product vertical land motion (VLM), varying depending on tectonic, sedimentological, anthropogenic factors. We investigate role subsidence in present-day dynamics an abandoned delta Colombian Caribbean. Satellite images synthetic aperture radar acquisitions used assess decadal-scale coastline rates period 2007–2021. found highly variable alongshore. up ?1.0 cm/yr correspond with area erosion ?15 m/yr, but occurs sectors where was not detected. The results highlight influenced by multiple, interacting drivers, including sand supply, orientation engineering structures, alone does explain high along study area. By end century, ongoing ?25 annual about ?1 cm/yr, current rise expected increase flooding levels jeopardize existence deltaic barrier island.