Spatiotemporal dynamics of suspended sediment in coastal Mekong Delta: a hydrodynamic modelling approach under tropical monsoon climate.

Suspended sediment concentration (SSC) plays a pivotal role in shaping coastal dynamics, impacting terrestrial and marine ecosystems. This study employed the hydrodynamic model MIKE21 to simulate hydrological runoff and sediment transport within the Mekong River's fluvial-marine continuum, the longest river in Southeast Asia currently challenged with escalating anthropogenic pressures and sea-level rise. By strategically selecting hourly observed data from various locations (river channel, coastal estuary) and periods (dry and rainy seasons) for model calibration and validation, we demonstrated the robust performance of the model simulation of both water levels (RMSE: 0.