Author(s): Kun-Yeun Han; Taehyung Kim
Linked Author(s):
Keywords: MCDM; Fuzzy; TOPSIS; Flood Hazard Map; Flood Risk
Abstract: The regional impact of climatic change causes increase of the frequency and intensity of the flood disaster related with more frequent heavy storm and typhoon. They inflicted heavy casualties and severe financial losses in Korea. Therefore it is essential to achieve flood loss reduction throughout the country by decreasing the vulnerability to flood impacts and damages. To resolve the problem, it is urgently needed that nonstructural measures such as a flood information system and flood risk mapping as well as structural measures such as river improvement and detention/retention basin supplement for flood control. Under the current circumstances, reducing vulnerability to floods is a way to prepare for flood disasters and decrease damages from floods. In particular, flood damages are endemic, and therefore pan-spatial reviews on a watershed level are required. Optimal technologies to establish safety in flood control, technologies to evaluate watershed-scale flood control, technologies to evaluate and establish safety in flood control by each area/facility, and technologies to enhance and evaluate non-structural flood measures will be developed. These will be applied to link structural and non-structural measures, thereby developing optimal watershed-scale technologies to cope with floods. Flood control models that can simulate extreme flood propagation resulting from the collapse of hydraulic structures and technology for flood risk mapping using extreme flood analysis and management of technologies will be designed. This will be done by improving the reliability and precision of the hydraulic characteristics of extreme flood waves resulting from the collapse of hydraulic structures. Then, an emergency management system for extreme floods will be developed and operated. This paper attempted to present a flood risk map that can express actual flood risks based on the concept of the existing Flood Hazard Maps in case of an actual flood. It reflected flood velocity and travel time of maximum flood wave as well as flood depth that is considered as those factors for preparing for the flood hazard map when preparing for the existing domestic flood risk maps.
Year: 2014