SWMM 모델을 이용한 지속 가능한 도시 소하천 관리를 위한 LID 기법의 적용 방안 연구

Though the upper stream basin area of Gwanpyung-Cheon in Daejeon, Korea is protected as Green Belt Zone, thestream is under constant environmental pressure due to current agricultural practices and infrastructure development in its basinarea. To develop appropriate integrated water resources management plan for the stream, it is necessary to consider not only waterquality problems but also water quantity aspect. In this study, Storm Water Management Model (SWMM) was calibrated andvalidated with sets of field measurements to predict for future water flow and water quality conditions for any rainfall event. While flow modeling results showed good agreement by showing correlation coefficient is greater than 0.9, water quality modelingresults showed relatively less accurate levels of agreements with correlation coefficient between 0.67 and 0.87. Hypothetical basindevelopment scenarios were developed to compare effect on stream water quality and quantity when Low Impact Development(LID) technologies are applied in the basin. The results of this study can be used effectively in decision making processes ofurban development Gwanpyung-Cheon area by comparing basin management alternatives such as LID methods.