| Title |
Estimation of Stormwater Interception Rate for Bio-retention LID Facility |
| Authors |
최정현 ( Choi Jeonghyeon ) ; 이옥정 ( Lee Okjeong ) ; 김상단 ( Kim Sangdan ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.5.563 |
| Keywords |
Bio-retention; EPA SWMM; Low impact development; Stormwater interception rate |
| Abstract |
Because of the rapid progress of urbanization in recent decades, the proportion of impervious areas in cities has increased. As a result, the hydrological properties of urban streams have changed and non-point pollution sources have increased, that have had considerable influence on human life and ecosystem. To manage these situations, the application of non-point pollution reduction facilities and LID facilities are expanding recently. In this study, it is investigated if rainfall interception rate used in design of non-point pollution reduction facilities can be applied to design of LID facilities. For this purpose, EPA SWMM is constructed for part of Noksan National Industrial Complex area wherein long-term observed storm water data can be obtained and storm water interception rates for various design capacities of a bio-retention LID facility reservoirs are estimated. While sensitivity of storm water interception rate according to design specifications of bio-retention facility is not large, the sensitivity of storm water interception rate according to regional rainfall characteristics is relatively large. As a result of comparing present rainfall interception rate estimation method with the one proposed in this study, the present method is highly likely to overestimate performance of the bio-retention facility. Finally, a new storm water interception rate formula for bio-retention LID facility is proposed. |