1. Introduction
Inundation has become a serious disaster in urban area with a context of climate change. This study aims to estimate the effect of regional characteristics of storm by climate changes on inundation hazards and to investigate the vulnerable area on inundation/floods and to calculate the effect of DRR (Disaster Risk Reduction) measures on inundation hazards.
2. Methodologies
2.1 Site description
The Sinwol-dong basin in Yangcheon-gu, Seoul in republic of Korea, is a highly developed urban area, where residential and commercial districts area concentrated and inundation occurs frequently during torrential storm.
2.2 Calculation of inundation hazards
The risk of inundation disaster is the combination of the probability of inundation event and of the potential adverse consequences for human health, the environment, cultural heritage and economic activity associated with a flood event.
Australian NSW guidelines for hazard category adopted here is described as below;
D(m) ≤ 0.3 and V(m/s) ≤ 0.38 : Low hazard
D(m) ≤ 1.2 and V(m/s) ≤ 1.5 : Moderate hazard
D(m) + 0.69 * V(m/s) ≤ 1.38 : High hazard
3. Conclusions
The prioritization of vulnerable areas were investigated considering return periods of design storm, which were commonly revealed in different return periods. To minimize inundation hazard, comprehensive measures were required including grey infra and LID.