The changes in COD, TOC, T-P, and T-N concentrations were investigated for 2 years in the constructed wetland of Sookcheon, which was installed to improve the water quality of Daecheong reservoir in South Korea. In order to evaluate the pollution level of sediments in the wetland, settling velocity of particulate material (4 times) and sedimet material contents (6 times) were measured. COD and TOC concentrations increased slightly as they passed through wetlands, and T-N and T-P concentration tended to decrease. The material content (COD, T-P, T-N) of aquatic plants was higher in floating-leaved and free-floating macrophytes than emergent macrophytes. As a result of measuring the sedimentation rate of suspended materials, most of the suspended materials introduced into constructed wetlands were sedimented at a rapid rate in the first sedimentation site. In addition, sediment pollution of T-P and T-N in constructed wetland was in severe pollution. The sediments containing a large amount of T-P and T-N were eluted by physical and chemical environmental changes, which is likely to act as internal pollution sources in wetlands.

Abstract
서 론
연구 방 법
    1. 조사대상지의 개요
    2. 조사방법
결과 및 고 찰
    1. 인공습지에서 유기물, T-P, T-N 농도의 변화
    2. 인공습지에 식재된 수생식물의 물질함량
    3. 인공습지내 각 지점별 부유물질 침강속도
    4. 인공습지내 각 지점별 퇴적물의 C, N, P 물질함량
적 요
REFERENCES

• 박제철(금오공과대학교 환경공학과) | Je-Chul Park (Department of Environmental Engineering, Kumoh National Institute of Technology) Corresponding author
• 김동섭(한국수자원공사) | Dong-Sup Kim (K-water, Daejeon 34045, Republic of Korea)
• 최광순(한국수자원공사) | Kwang-Soon Choi (K-water, Daejeon 34045, Republic of Korea)