Assessing the Tidal Influences on the Coastal Erosion-Accretion Processes in the Indian Sundarban Delta using Hydrodynamic Models and Geoinformatics

Abstract The Sundarbans is currently a subject of serious concern due to the massive coastline erosion that responsible for reshaping geomorphological content islands. coastal islands have become more susceptible sea-level rise, cyclonic storms, and flooding, which further accelerate process erosion. Identification erosion-prone regions highly essential integrated zone management. Till date, no scientific study has been done relate accretion with tidal velocity current direction in Indian Sundarbans. In this perspective, present identifies erosion-accretion zones using Landsat imageries 2000 2020 geoinformatics. It investigates impact on processes. MIKE 21 two-dimensional hydrodynamic model was simulated predict velocities directions. finds sea-facing experience maximum amount A significant shrinking land area takes place Bulchery, Bhangaduiani, Dalhousie rates these are 485.99 m/year, 487 480.65 respectively. Places high found be erosion-prone, while rate significantly varied flow Two islands, Bulchery Dalhousie, south-eastern margin delta, suffered over past decades high-velocity currents from southeast southwest, Alternatively, minor accretions were observed along sheltered island precincts where comparatively low. Such studies drive erosion–accretion processes delta during rise appear utmost importance sustainable protection