Management and Characteristics for Non-point Pollutants Runoff to Agricultural Drainage in Republic of Korea

摘要

This study (Apr.1,2016〜Dec. 31,2017) is survey result on drainage runoff characteristics ： Basin analysis (DEM construction, watershed map, land use map, etc.) was conducted for 55 sites in the river of polluted stream and the upper river master plan. The 10 areas (points) where farmland is highly utilized and where abatement facilities is constructed. They are Sangnamcheon, Chodongcheon, Kuankokcheon, Gyeseongcheon, Pungcheon, Dongjeongcheon, Ohmokcheon, Yonghochon, Yulgokcheon, and Acheon. Monitoring result of agricultural drainage characteristics ： The monitoring of drainage runoff characteristics from farmland was carried out at four sites (three sites in Danseong-myeon and one site in Jeokjung-myeon). Monitoring results of drainage runoff characteristics were analyzed for rainfall and non-rainfall by agricultural and non-agricultural periods. Effluent treatment efficiency of nonpoint pollutant abatement facility: The effluent treatment efficiencies of non-point pollutant abatement facilities (ecotrophic wetland) at 403 Sawalri, Danseong-myun, Sancheong-gun were expressed as SBOD 13.0%, SCODMn 11.1%, T-N 53.4% and T-P 45.8%. The effluent treatment efficiency of the non-point pollutant abatement facility (ecological waterway) at wunri, Danseong-myun, Sancheong-gun was relatively low except for T-N andDanseong-myun, Sancheong-gun in korea.