| Title |
Analysis of the Efficiency of Non-point Source Pollution Managements Considering the Land Use Characteristics of Watersheds |
| Authors |
최유진 ( Yujin Choi ) ; 이서로 ( Seoro Lee ) ; 금동혁 ( Donghyuk Kum ) ; 한정호 ( Jeongho Han ) ; 박운지 ( Woonji Park ) ; 김종건 ( Jonggun Kim ) ; 임경재 ( Kyoungjae Lim ) |
| DOI |
https://doi.org/10.15681/KSWE.2020.36.5.405 |
| Keywords |
BMPs; Land use; LID; Non-point source; SWAT |
| Abstract |
Land use change by urbanization has significantly affected the hydrological process including the runoff characteristics. Due to this situation, it has been becoming more complicated to manage non-point source pollutions caused by rainfall. In order to effectively control non-point sources, it is necessary to identify the reduction efficiency of the various management method based on land use characteristics. Thus, the purpose of this study is to analyze the reduction efficiency of non-point source pollution management practices targeting three different watersheds with the different land use characteristics using the Soil and Water Assessment Tool (SWAT). To do this, the vulnerable subwatersheds to non-point source pollution occurrence within each watershed were selected based on the streamflow and water quality simulation results. Then, considering the land use, low impact development (LID) or best management practices (BMPs) were applied to the selected subwatersheds and the efficiency of each management was analyzed. As a result of analysis of the non-point source pollution reduction efficiency, when LID was applied to urban areas, the average reduction efficiencies of SS, NO3-N, and TP were 5.92%, 4.62%, and 10.35%, respectively. When BMPs were applied to rural areas, the average reduction efficiencies of SS, TN and TP were 35.45%, 4.37%, and 10.16%, respectively. The results of this study can be used as a reference for determining appropriate management methods for non-point source pollution in urban, rural, and complex watersheds. |