| Title |
A Study on the Stormwater Drainage Method of Overflow Type for the Prevention of Urban Flood due to Abnormal Precipitation |
| Authors |
서세덕(Seo, Se Deok) ; 박형근(Park, Hyung Keun) ; 김태현(Kim, Tae Hyun) |
| DOI |
https://doi.org/10.12652/Ksce.2019.39.5.0569 |
| Keywords |
이상강우;우수저류조;월류형;지구온난화 Abnormal rainfall;SWMM;Stormwater detention tank;Overflow type;Global warming |
| Abstract |
Urban flooding has been a frequent phenomenon in recent years caused by the increase in maximum stormwater runoff arising from abnormal rainfall due to global warming, urban development, and development of lowlands according to population inflows. In order to respond positively against abnormal precipition in the city, it is necessary to check the GWI (Green Water Infra) effect and effectively utilize the existing stormwater detention tanks and treat stormwater to prevent local flooding. In this study, Overflow Type stormwater drainage methods are evaluated as a method of preventing urban flooding in abnormal precipitation using the Dynamic Wave Analysis SWMM (Storm Water Management Model) provided by the United States Environmental Protection Agency. Comparing and analyzing the Upward Watergate Type and Overflow Type, it was analyzed that the Overflow Type reduces the maximum flood discharge by 61 % and the total flood volume by 56 % in the rainfall of Typhoon Kong-rey. The application of the Overflow Type and the natural-pneumatic drainage method to the rainfall of Typhoon Soulik resulted in a 20 % reduction in maximum flood runoff and a 67 % reduction in total flood quantity. Therefore, as a solution to the abnormal rain fall, it is possible to improve the existing stormwater detection tank and install additional facilities. It is expected to be economically possible to strom drainage under limited conditions. |