안성천 상류 유역에서 BASINS/WinHSPF를 이용한 비점오염원 유출특성분석

Abstract

In Korea, half of the annual rainfall is concentrated in summer season and there is a limit to apply watershed management plan focused on point sources only. As for the land use characteristics, 70 % of the total area is forest area and 20 % is agricultural area. Due to land use properties, the main water quality problems of river and lakes comes from non-point sources which are tend to be annually increased. Most non-point pollutants enter river or lakes through rainfall runoff. These are affected by the characteristics of land use and the season, and it is difficult to quantify and predict. These non-point sources are not only affecting the water quality of river or lakes, but also the surrounding landscape and water body ecosystem. Therefore, management of non-point sources is becoming more important. Effective watershed management plan need to the control and countermeasures of non-point sources containing various pollutants. This study attempts to understand the runoff characteristics of non-point sources using BASINS/WinHSPF model in the upper Anseong stream basin. The control and management plan of non-point sources can be effectively set up from this study.