Modeling Morphological Changes due to Multiple Typhoons in the Danshui River Estuary

Abstract

This paper presents a preliminary study on morphological changes in the Danshui River estuary driven by tides, waves, and river floods during the period of three typhoons in 2008 (Fung Wong, Sinlaku, and Jangmi) using an integrated coastal process model. The submodels for wave, current, and sediment transport were validated by comparing the simulation results with available observation/survey data. Model validation results indicate that the simulated water levels, flow velocities, and wave heights are in good agreement with the measurements at gages, and the simulated bed changes have captured the major features of deposition and erosion in the river, the estuary, and adjacent coasts.