This study analyzed the temporal and spatial characteristics of water quality for five hydropower dam reservoirs in South Korea. Water temperature, pH, dissolved oxygen, and chlorophyll-a (Chl-a) showed high fluctuations in summer and autumn at all reservoirs, indicating the existence of seasonal effects. At all five reservoirs, the concentrations of suspended solids (SS) and total nitrogen (TN) fell under the “slightly bad” category and those of total organic carbon (TOC) fell under the “slightly good” category or higher, according to “the standard for living environment of lake water quality.” Variations in the concentration ranges and degrees of change in SS, TN, and TOC among reservoirs were observed, indicating the influences of rainfall, surrounding environments, and seasonal changes. Daecheong and Namgang Dam showed high Chl-a concentrations in summer, indicating that the metabolism of microbial communities, such as algae, was active.

Abstract
1. 서 론
2. 연구 방법
    2.1. 연구 대상지역 운영 현황
    2.2. 자료 수집
3. 결과 및 고찰
    3.1. 수력발전댐 저수지 별 수질 현황
    3.2. 수력발전댐의 월별 수질 변화
4. 결 론
REFERENCES

• 박경덕(부경대학교 지질환경연구소) | Kyoung-deok Park (Institute of Environmental Geosciences, Pukyong National University, Busan 48513, Korea)
• 강동환(부경대학교 지질환경연구소) | Dong-hwan Kang (Institute of Environmental Geosciences, Pukyong National University, Busan 48513, Korea) Corresponding author
• 조원기(부경대학교 지질환경연구소) | Won Gi Jo (Institute of Environmental Geosciences, Pukyong National University, Busan 48513, Korea)
• 양민준(부경대학교 지구환경시스템과학부 지구환경과학전공) | Minjune Yang (Division of Earth and Environmental System Sciences, Major of Environmental Geosciences, Pukyong National University, Busan 48513, Korea)