1) 발표자: 신진호

2) 학술대회명: 2025 한국기후변화학회

3) 발표 주제: Mapping Urban Flood Risk from Inlet Clogging under Future Climate: A Decision-Support Approach for Urban Resilience

4) 발표 내용

The increased intensity and frequency of rainfall caused by climate change, combined with capacity-reduced drainage infrastructure, is increasing the risk of urban flooding. Particularly in low-lying areas of older urban centres, clogged street inlets are reported to be a major cause of flooding, even at rainfall level below design capacity. This study aims to quantify the combined effects of extreme rainfall and clogged inlets and present the results in the form of flood risk maps and decision support tools for policy makers.
In this study, rainfall scenarios were constructed based on future daily maximum rainfall projections, and inlet blockage levels were categorised into three levels: mild, moderate, and severe. The two factors were combined into a matrix to simulate single and combined situations, and economic losses were estimated through a damage function combining flooding depth and building asset value.
The results showed that (i) the flooding area and damage amount could be quantitatively assessed when rainfall or clogging acted alone and when both factors were combined; (ii) the flood hot spots were identified on the urban flood maps, and new vulnerable areas were found to arise under extreme conditions; and (iii) the urban flood maps produced by the study could be used as a support tool for management prioritization.
This study contributes to the promotion of urban resilience by scientifically suggesting priority locations and response sequences for city managers. However, field validation of the blockage coefficient, uncertainty analysis considering different rainfall types and frequencies, and inclusion of additional infrastructure failure factors such as pump failure remain future challenges.