Spatiotemporal Trends of Bora Bora’s Shoreline Classification and Movement Using High-Resolution Imagery from 1955 to 2019

Coastal urbanisation is a widespread phenomenon throughout the world and often linked to increased erosion. Small Pacific islands are not spared from this issue, which of great importance in context climate change. The French Polynesian island Bora was used as case study investigate historical evolution its coastline classification position 1955 2019. A time series very high-resolution aerial imagery processed highlight changes island’s coastline. overall length natural shores, including beaches, decreased by 46% 2019 while human-made shores such seawalls 476%, represented 61% This alters sedimentary processes: images highlights erosion vicinity embankments, leading incremental need construct additional walls. In addition, gradual removal shoreline types modifies landscapes may negatively impact marine biodiversity. Through documenting coastal over time, impacts structures on erosional processes underscores for sustainable management plans Polynesia.