Managing Shoreline Degradation Caused by Sea‐Level Rise and Human Pressures in Coastal and Deltaic Environments

Shoreline degradation in coastal and deltaic environments reflects the combined influence of sea‐level rise, climate extremes, and human pressures that change sediment supply, land elevation, and coastal buffers. This study compares shoreline change across six major deltas using satellite‐derived shorelines extracted with CoastSat and shoreline‐change rates computed with DSAS. The main shoreline–pressure comparison window is 2012–2020 (longer shoreline windows are reported as sensitivity checks where imagery allows). Shoreline outcomes are summarized at transect and delta levels using linear regression rates from multi‐date shorelines, while pressure indicators are aligned to common windows (built‐up change: 2000–2020; mangrove change: 1996–2020; night‐time lights and climate pressures: 2012–2020). A typology and ranking are constructed from standardized indices of shoreline degradation, climate stress, human pressure, upstream regulation, and ecosystem buffering. Results indicate the highest combined degradation pressure in the Indus and Mekong, where high climate stress overlaps with strong human pressures. Storminess and upstream regulation pressure show stable negative associations with shoreline outcomes across robustness checks, while development proxies show mixed signals that likely reflect both exposure growth and localized protection. Mangrove gains co‐occur with more stable shorelines, consistent with buffering but not establishing causality. The framework supports hotspot targeting, repeatable monitoring, and basin‐to‐coast coordination for shoreline management under rising climate risk.