The MFFn(Mass first flush), EMCs(Event mean concentrations) and runoff loads were analyzed for various rainy events(monitoring data from 2011 to 2012) in transportation area(rail road in station). The pollutant EMCs by volume of stormwater runoff showed the BOD5 9.6 ㎎/L, COD 29.9 ㎎/L, SS 16.7 ㎎/L, T-N 3.271 ㎎/L, T-P 0.269 ㎎/L in the transportation areas(Railroad in station). The average pollutant loading by unit area of stormwater runoff showed the BOD5 27.26 kg/㎢, COD 92.55 kg/㎢, SS 50.35 kg/㎢, T-N 10.13 kg/㎢ and T-P 10.13 kg/㎢ in the transportation areas. Estimated NCL-curve(Normalized cumulated-curve) was evaluated by comparison with observed MFFn. MFFn was estimated by varying n-value from 10% to 90% on the rainy events. The n-value increases, MFFn is closed to '1'. As time passed, the rainfall runoff was getting similar to ratio of pollutants accumulation. The result of a measure of the strength of the linear relationship between observed data and expected data under model was good.

Abstract
 1. 서 론
 2. 연구방법
  2.1. 조사지점 현황
  2.2. 강우유출수 모니터링
  2.3. 강우사상별 EMCs 산정
  2.4. 초기세척현상
  2.5. 초기세척 비율
 3. 연구결과 및 고찰
  3.1. 강우유출수 모니터링 결과
  3.2. 비점오염원별 EMCs 및 유출부하량 산정
  3.3. 비점오염원별 초기세척효과 분석
  3.4. 비점오염원별 초기세척비율 산정
 4. 결 론
 참 고 문 헌

• 이춘식(경남과학기술대학교) | Chun Sik Lee (Department of Environmental Engineering, Kyeongnam National University of Science and Technology)
• 서규태(창원대학교) | Gyu Tae Seo (Department of Environmental Engineering, Changwon National University)
• 윤조희(경남대학교) | Cho Hee Yoon (Department of Environmental Engineering, Kyeongnam University) Corresponding author
• 권헌각(국립환경과학원 낙동강물환경연구소) | Heon Gak Kwon (Nakdong River Water Environment Research Center, National Institute of Environmental Research)
• 이재운(국립환경과학원 낙동강물환경연구소) | Jae Woon Lee (Nakdong River Water Environment Research Center, National Institute of Environmental Research)
• 천세억(국립환경과학원 낙동강물환경연구소) | Se Uk Cheon (Nakdong River Water Environment Research Center, National Institute of Environmental Research)