Flood Risk Assessment in Fujian Province, China

Flood risk assessment is important for decision-making in flood management strategies and countermeasures. In this paper, an index system including one integrated index, three component indices, and eight basic indices is first introduced. Then a simple model based on the index system is formulated for assessing flood risks in the mid- and macro-scale regions. Two methods, namely Normal Distribution Reference and Hazard-Vulnerability Block, are used thereafter to define threshold values of risk levels. A macrostrategy for flood management is finally developed based on computed flood risk levels. A case study was carried out for flood risk assessment at the county level in Fujian province, China, and simulation results matched with local relief and historical flood records well.