A sediment control dam is an artificial structure built to prolong sedimentation in the main dam by reducing the inflow of suspended solids. These dams can affect changes in dissolved organic matter (DOM) in the water body by changing the river flow regime. The main DOM component for Yeongju Dam sediment control of the Naeseongcheon River was analyzed through 3D excitation-emission matrix (EEM) and parallel factor (PARAFAC) analyses. As a result, four humic-like components (C1~C3, C5), and three proteins, tryptophan-like components (C2, C6~C7) were detected. Among DOM components, humic-like components (autochthonous: C1, allochthonous: C2~C3) were found to be dominant during the sampling period. The total amount of DOM components and the composition ratio of each component did not show a difference for each depth according to the amount of available light (100%, 12%, and 1%). Throughout the study period, the allochthonous organic matter was continuously decomposing and converting into autochthonous organic matter; the DOM indices (fluorescence index, humification index, and freshness index) indicated the dominance of autochthonous organic matter in the river. Considering the relative abundance of cyanobacteria and that the number of bacteria cells and rotifers increased as autochthonous organic matter increased, it was suggested that the algal bloom and consequent activation of the microbial food web was affected by the composition of DOM in the water body. Research on DOM characteristics is important not only for water quality management but also for understanding the cycling of matter through microbial food web activity.

서 론
재료 및 방 법
    1. 조사대상지 및 조사시기
    2. 3차원 형광 EEM 분석
    3. DOM 성분 분석 및 지표 (index) 산출
    4. 물리 . 화학 및 생물학적 환경 요인 분석
    5. 통계 분석
결과 및 고 찰
    1. DOM 특성 시공간 변화
    2. 수질 및 생물학적 환경 요인 주성분 분석
    3. DOM 특성과 물리 . 화학 및 생물학적 환경 요인 간 관계분석
적 요

• 오혜지(경희대학교 환경학및환경공학과) | Hye-Ji Oh (Department of Environmental Science and Engineering, Kyung Hee University, Yongin 17104, Republic of Korea) Corresponding author
• 김도균(한양대학교 해양융합과학과) | Dokyun Kim (1Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan 15588, Republic of Korea)
• 최지수(한양대학교 해양융합과학과) | Jisoo Choi (1Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan 15588, Republic of Korea)
• 채연지(경희대학교 환경학및환경공학과) | Yeon-Ji Chae (Department of Environmental Science and Engineering, Kyung Hee University, Yongin 17104, Republic of Korea)
• 오종민(경희대학교 환경학및환경공학과) | Jong Min Oh (Department of Environmental Science and Engineering, Kyung Hee University, Yongin 17104, Republic of Korea)
• 신경훈(한양대학교 해양융합과학과) | Kyung-Hoon Shin (1Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan 15588, Republic of Korea)
• 최광순(K-water연구원) | Kwangsoon Choi (K-water Institute, Daejeon 34045, Republic of Korea)
• 김동균(K-water연구원) | Dong-Kyun Kim (K-water Institute, Daejeon 34045, Republic of Korea)
• 장광현(경희대학교 환경학및환경공학과) | Kwang-Hyeon Chang (Department of Environmental Science and Engineering, Kyung Hee University, Yongin 17104, Republic of Korea) Corresponding author