This study was conducted to estimate the distribution characteristics and budget of organic matter in the Lake Hapcheon. In the dry season, the concentration ranges of organic carbons were similar, but in the rainfall season, it showed about double concentrations. Changes of vertical water quality in the lake, there were no big differences with the concentration by the depth. However, it tends to be relatively high on the surface, a little low on the mid-depth and high in the lake bottom. DOC rate at TOC, it was lower than POC rate at inflow and DOC rate was higher than POC rate in the lake and discharging water. R-DOC accounted for more 80% of DOC rate in all investigated areas, therefore we judge that this R-DOC is to increase the organic carbon pollution gradually. As the result of the calculated organic carbon budget in the Lake Hapcheon, the amount of allochthonous, autochthonous and release were 3,552, 3,288, 228 tonC/year, respectively. the amount of discharge, decomposition and sedimentation were 504, 1,344, 5,520 tonC/year, respectively. According to this investigation, the changed amount of organic matter in the Lake Hapcheon recorded -300 tonC/year with the increase of 7,068 tonC/year and the decrease of 7,368 tonC/year.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 조사대상지의 개요 및 조사 시기
  2.2. 유량조사 및 수질분석, DOC 분해실험
  2.3. 유기물 수지 파악
 3. 결과 및 고찰
  3.1. 수문학적 특성 및 호내의 물리학적 특성
  3.2. 조사지점 별 유기물의 분포특성
  3.3. 조사지점 별 DOC 및 R-DOC 비율
 4. 결 론
 참 고 문 헌

• 성진욱(금오공과대학교 환경공학과) | Jae-Chul Park (Department of Environment Engineering, Kumoh National Institute of Technology)
• 김형진(금오공과대학교 환경공학과) | Jae-Chul Park (Department of Environment Engineering, Kumoh National Institute of Technology)
• 박제철(금오공과대학교 환경공학과) | Jae-Chul Park (Department of Environment Engineering, Kumoh National Institute of Technology) Corresponding Author