1) 발표자: 신진호

2) 학술대회명: AGU Annual Meeting 2024

3) 발표 주제: Flood Risk Assessment Considering unexpected Clogging under climate change in Urban Drainage system

4) 발표 내용

Due to climate change, the variability of rainfall and the duration of the rainy season have increased. Recently, flooding in the autumn has been attributed to the clogging of inlets with fallen piles of leaves in South Korea. While we calculate to ensure sufficient drainage capacity in heavy rainfall, sometimes, we do not anticipate cases where inlets are clogged and drains are not working properly. This increases the risk of unexpected flooding. Nevertheless, currently, there is a lack of potential flood risk assessment studies that consider the factors associated with inlet blockages. In light of this background, this study aims to explore whether flood risk may be influenced by specific environmental factors(e.g., fallen leaves and garbage). To this end, The study first devised a series of scenarios to evaluate the potential risk associated with clogged conditions in a partial neighborhood of Michuhol-gu, Incheon, Korea. The case studies were based on two key factors: the impact of pedestrian traffic on the accumulation of garbage and the influence of street trees on the deposition of fallen leaves. Subsequently, simulations with these cases were conducted using a PCSWMM model created to implement the rainwater system. Finally, the simulation results of the scenarios were compared with the existing flood risk areas designated by the local authority. The results demonstrated that adjusting the clogging parameter in consideration of actual circumstances, such as pedestrian traffic and street trees, could identify a potential flood risk. The discovery of different patterns of flood risk areas can impact the effective management of the risk of clogged inlets or the planning of the urban street and drain system.