| Title |
Development of Coupled SWAT-SWMM to Evaluate Effects of LID on Flow Reduction in Complex Landuse |
| Authors |
우원희 ( Won Hee Woo ) ; 류지철 ( Ji Chul Ryu ) ; 문종필 ( Jong Pil Moon ) ; 장춘화 ( Chun Hwa Jang ) ; 금동혁 ( Dong Hyuk Kum ) ; 강현우 ( Hyun Woo Kang ) ; 김기성 ( Ki Sung Kim ) ; 임경재 ( Kyoung Jae Lim ) |
| Keywords |
Low Impact Development; LID; SWAT; SWAT-SWMM; SWMM |
| Abstract |
Abstract In recent years, urbanization has been a hot issues in watershed management due to increased pollutant loads from impervious urban areas, The Soil and Water Assessment Tool (SWAT) model has been widely used in hydrology and water quality studies at watershed scale. However, the SWAT has limitations in simulating water flows between HRUs and hydrological effects of LID practices. The Storm Water Management Model (SWMM) has LID capabilities, but it does not simulate non-urban areas, especially agricultural areas. In this study, a SWAT-SWMM coupled model was developed to evaluate effects of LID practices on hydrology and water quality at mixed-landuse watersheds. This coupled SWAT-SWMM was evaluated by comparing calibrated flow with and without coupled SWAT-SWMM. As a result of this study, the R2 and NSE values with SWAT are 0.951 and 0.937 for calibration period, and 0.882 and 0.875 for validation period, respectively, the R2 and NSE values with SWAT-SWMM are 0.877 and 0.880 for validation period. Out of four LID scenarios simulated by SWAT-SWMM model, the green roof scenario was found to be most effective which reduces about 25% of rainfall-runoff flows. |