Yongsan ward is located at central place connecting south and north ecology axis of seoul. Various environment-friendly Yongsan development could pose positive effects on NPS(non pollutant source) pollutant reductions and water quality improvement at Han-rive because BOD, T-N, and T-P NPS discharges took 90% of total pollutant from this area. In this study, direct runoff and NPS pollutant loads were evaluated before and after development using spatio-tamporal change in CN(curve number) and EMC(event mean concentration) data. It was found that direct runoff value is 23,584,724 m3, and BOD, T-N and T-P loads are 104,456 kg/year, 111,483 kg/year and 7,500 kg/year under pre-development condition, respectively. Annual runoff, BOD, T-N and T-P reducing rate were 12.9%, 33.3%, 35.6% and 40.7% under integrated post-development condition, respectively. Based on the results obtained in this study, environment-friendly urban development could be achieved at Yongsan area.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 연구 대상 지역
  2.2. 용산구 환경도시계획의 내용
  2.3. 공간적 변화를 고려한 CN
  2.4. 시간적 변화를 고려한 CN
  2.5. 토지이용형태별 강우유출수 평균농도(EMC)
  2.6. 직접유출 및 비점오염부하
  2.7. 분류식 하수관거 설치효과(Scenario-6)
 3. 결과 및 고찰
  3.1. 시공간적 CN 적용에 따른 직접유출량 및 비점오염 부하량
  3.2. 토지이용변화에 따른 유출 및 비점오염부하 비교
  3.3. 분류식 하수관거로 인한 비점오염부하 저감률 산정 결과
 4. 결 론
 참 고 문 헌

• 최재완(국립환경과학원) | Jae-Wan Choi (National Institute of Environmental Research)
• 이성준(국립환경과학원) | Sung-Joon Lee (National Institute of Environmental Research)
• 류지철(국립환경과학원) | Ji-Chul Ryu (National Institute of Environmental Research)
• 신동석(국립환경과학원) | Dong-Seok Shin (National Institute of Environmental Research)
• 임경재(강원대학교 지역건설공학과) | Kyoung-Jae Lim (Department of Regional Infrastructure Engineering, Kangwon National University) Corresponding author