Flood hazard assessment and early flood forecasting for the Kon and Ky Lo rivers along the South-Central Coast of Vietnam

Major flooding of rivers often causes serious consequences such as human lives and economic damage. Due to climate change and urbanization trends, the frequency of flooding is increasing, as well as in Vietnam. Located in the tropical monsoon region, Vietnam is affected by multiple types of natural disasters every year. Floods cause the greatest impact in terms of frequency of occurrence, economic damage, and other impacts on the environment and society. As floods become more extreme due to climate change, it is essential to develop a sustainable plan for limiting the frequency and impact of floods and to have timely and accurate warning systems. In this doctoral research, the current and future flood prevention probabilities are determined through the combined application of statistical analysis and hydrological-hydraulic modeling. A real-time forecasting system is developed for two river basins in the south-central coastal region of Vietnam. Influencing factors such as the impact on the coast, discharge from hydropower reservoirs during heavy rainfall, the problem of urbanization and deforestation in the upstream areas, the influence of mining, the scarce availability of data, etc. are taken into account.