Asessment of flood risk on human in downstream of Vu Gia - Thu Bon river basin by combining GIS and hydraulic model

Abstract

Flooding is a natural disaster that occurs in most parts of Vietnam, causing a lot of damage to people, assets and influence on socio-economic activities. This article analyzes the impact of floods on population in the Vu Gia – Thu basin. In this study, the authors used the result of the hydrolic modeling, the simulated floods in conjunction with the use of GIS software (ArcGIS) to analyze the impact on the population of downstream the Vu Gia – Thu Bon river basin. From there, the study indicated the impact and influence of floods caused on flooded areas in the river basin. The ArcGIS software is used to prepare data, integrate and analyze the spatial data that is included with the attribute information. This study show that GIS provides more accurate solutions for flood impact assessment and this assessment method can be applied to any river basin.