Monitoring and Investigation of Dynamic Morphological Change in Meghna Estuary

Abstract

Meghna Estuary is located in the south of Bangladesh and is one of the most dynamically deforming estuaries on the earth. The Ganges, the Brahnmaputra, and the Meghna merge with each other and find their way to Meghna Estuary and discharge with huge amount of sediment. The recent coastlines were distinguished by a total of twenty-one PALSAR images from 2007 to 2011. Observed change of the land area was compared with various factors and it was found from the analysis that the morphological change in Meghna Estuary showed seasonal cyclic trend and is strongly related to heavy sediment discharge from the Meghna River and near shore waves. It should also be highlighted that precipitations in the catchment and the observed area change showed strong correlations but has clear phase shift of around 100 days.