This study was conducted to investigate runoff characteristics of non-point pollutants source at the urban and rural zones in sangju area. The monitoring was conducted with seven events for ten months and Event mean Concentration(EMC) and First Flush Effect(FFE) of SS and BOD were calculated on the result of the water quality parameters. During rainfall event, the peak concentrations of SS and BOD were observed after 3∼4 hours of rainfall in rural areas. Whereas, the peak concentrations occurred within 1∼2 hours after rainfall and then the highest concentration of NPS pollutants sharply decreased, showing strong first flush effect in urban areas. The cumulative load curves for NPS pollutants showed above the 45° straight line, indicating that fist flush effect occurred in urban areas. The mean SS EMC values of rural areas ranged from 0.9∼3.3mg/L, it was higher value when compare to urban areas. While the mean BOD values of urban areas were shown the highest values.

Abstract
 1. 서 론
 2. 자료 및 방법
  2.1. 초기강우 특성
  2.2. 조사 및 분석방법
 3. 결과 및 고찰
  3.1. 수문특성 분석
  3.2. 토지이용별 특성분석
  3.3. 비점오염물질 유출특성
  3.4. 토지이용별 유량가중평균농도(EMC)
  3.5. 초기세척효과(First flush effect)
 4. 결 론
 참 고 문 헌

• 최윤영(경북대학교 건축도시환경공학부) | Yun-Yeong Choi (School of Architecture Urban Environmental Engineering, Kyungpook National University) Corresponding Author
• 정세영(경북대학교 건축도시환경공학부) | Se-Young Jung (School of Architecture Urban Environmental Engineering, Kyungpook National University)
• 최정우(경북대학교 건축도시환경공학부) | Jeong-Woo Choi (School of Architecture Urban Environmental Engineering, Kyungpook National University)