This study was conducted to investigate runoff characteristics of non-point pollutants source at the urban area in boeun area, Chungbuk Province. The monitoring site covering the watershed of 2.11 km 2 contains about 40.3 % of total watershed with the urban area. The monitoring was conducted with six events for five months and Event Mean Concentration(EMC) and Site Mean Concentration(SMC) of SS, BOD, CODMn, T-N, T-P were calculated on the result of the water quality parameters. As a result of the comparion between Arithmetic Mean Concentration and Event Mean Concentration, it showed that over all Event Mean Concentration was higher than Arithmetic Mean Concentration. And it showed that SS, BOD, T-P featured the first-flushing effect, showing relatively high concentration in early-stage storm event.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 조사대상지의 개요
  2.2. 각 이벤트 동안의 강우사상
  2.3. 유량조사 및 수질분석
 3. 결과 및 고찰
  3.1. 강우유출수의 수질 분석
  3.2. EMCs와 SMC 분석
  3.3. 초기세척효과(First Flush Effect)
  3.4. 초기세척비율(Mass First Flush Ratio, MFF)
 4. 결 론
 참 고 문 헌

• 이건직(금오공과대학교 환경공학과) | Geon-Jik Lee (Department of Environment Engineering, Kumoh national Institute of Technology)
• 성진욱(금오공과대학교 환경공학과) | Jin-Uk Seong (Department of Environment Engineering, Kumoh national Institute of Technology)
• 박제철(금오공과대학교 환경공학과) | Je-Chul Park (Department of Environment Engineering, Kumoh national Institute of Technology) Corresponding Author
• 박주현(국립환경과학원) | Ju-Hyun Park (National Institute of Environment Research)
• 조규수(한국환경산업기술원) | Gyu-Soo Joe (Korea Environmental Industry & Technology Institute)