비점오염 저감을 위한 LID 기법 적용과 저감효과 분석

Abstract

In recent years, LID (Low Impact Development) has been a hot issue in watershed management due to increase in impervious areas with rapid urbanization and land use changes. This study illustrates how to design and evaluate the effect of non-point pollutant management using EPA-SWMM LID module and suggests design parameters for modeling LID facilities. Optimal installation location of LID was determined by a simple distributed hydrologic model and that was simulated by using SWMM for a long-term. Also, this study illustrates how to design and evaluate a non-point pollutant management detention pond using SWMM. In particular, special attention is given to the orifice design. And a methodology which can be used to design a virtual junction in SWMM has been proposed to quantify water quality improvement triggered by the detention pond installation.