Development of flood risk warning system for river basins of Viet Nam, case study in the Cai Nha Trang River basin

Tóm tắt

Flooding is one of the most serious natural hazards affecting river basins in Viet Nam, particularly in urban and coastal areas. This paper presents the development of a flood risk warning system for the Cai Nha Trang River Basin. In this study, flood risk is quantified based on the combination of three components: Hazard, exposure, and vulnerability. Hydrological and hydraulic models were applied to simulate flood hazards, while socio-economic and land use data were used to assess exposure and vulnerability. These layers were integrated into a WebGIS platform that allows real-time monitoring of rainfall and water levels from observation stations, and provides flood risk assessment under different rainfall and flood scenarios. The system not only visualizes the spatial distribution of risks but also supports timely warnings and decision-making. Results from the Cai Nha Trang case study suggest that the proposed approach can be an effective tool to improve preparedness and strengthen resilience in flood-prone basins of Viet Nam.