QUAL2E 모형을 이용한 하천의 비점오염원대책 시행 효과 분석

Abstract

The Ministry of Environment of Korea has put an effort in managing point source pollution control in order to improve the water quality of rivers. However, the improvement reaches the limitations because the non-point source pollution still inflows. Especially, the non-point source pollution that generated from small residences, livestock farms and rice field is dominant in rural area. Using the QUAL2E model simulation, water quality is analyzed to estimate the effect of the 4 types of non-point source abatement facilities to the receiving river. Overall, reed channel is less effective method to improve pollution control than the other facilities of artificial marsh, reservoir or filtering reed channel. Artificial marsh was the most effective to reduce BOD loading rate. However, the reservoir and filtering reed channel were effective to reduce SS. Filtering reed channel was also effective to TP reduction. BOD loading rate to the receiving river is estimated as high as 67kg/day and will be reduced to 34kg/day by artificial marsh.