This study was to investigate the runoff characteristics of non-point pollutants source at the urban area in Suwon city. The highest T-N and T-P concentration of rainfall runoff observed in agricultural area. In residential area, the highest BOD5 and SS concentration of rainfall runoff was investigated. During rainfall events, the peak concentrations of SS and BOD5 were observed after 1~2 hours of rainfall in urban area. Whereas, the peak concentrations occurred within 1~2 hours after rainfall and then the highest concentrations of SS and BOD5 sharply decreased, showing strong first flush effect in urban area. The EMC results indicated that the highest value of T-N and T-P in agricultural area was observed. While residential area was shown the lowest EMC value as T-N and T-P. Non-point pollutant loads on the land use types in urban area were investigated in the order of residential>industrial>agricultural>highway. BOD5 and SS loads on urban watershed were investigated in the order of Suwon>Hwangguji>Seoho>Wonchunri. Whereas, T-N and T-P loads on urban watershed were investigated in the order of Hwangguji>Suwon>Wonchunri>Seho.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 연구재료
  2.2. 연구방법
 3. 결과 및 고찰
  3.1. 강우유출수의 유량 및 수질 결과
  3.2. 강우사상별 강우 유출수 최대유량 및 오염물질 최고농도
  3.3. 유량가중 평균농도(EMC) 결과
  3.4. 배출부하량 산정
 4. 결 론
 참 고 문 헌

• 지홍진(수원시청 물관리과) | Hong-Jin Chi (Water Management Division, City of Suwon)
• 이상은(아주대학교 환경공학과) | Sang-Eun Lee (Environmental, Civil and Transportation Engineering, Ajou University) Corresponding author
• 이재동(가천대학교 환경에너지공학과) | Jae-Dong Lee (Environmental and Energy Engineering, Gachon University)