Effects of sea dike construction on flood control in Can Gio Bay using a 2D mathematical modeling

Abstract

    The Can Gio is a famous district for the mangrove swamps as mangrove biosphere reserve for Ho Chi Minh City (HCMC). It has flat, low-lying topography that is affected by the tidal regime of the East Sea and by upstream flow of Dong Nai - Saigon river system. The historical flood event of 2000, which had a return period of 20 years, caused serious flooding in the downstream of HCMC, and approximately 90% of Can Gio Bay's area was inundated. This research aims to assess the water levels and the inundation of the Can Gio Bay area under sea dike construction and sea level rise. A two-dimensional hydrodynamic model combined with a wetting and drying scheme was used to determine locations of inundated area.