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ISSN : 2288-1115(Print)
ISSN : 2288-1123(Online)
Korean Journal of Ecology and Environment Vol.52 No.4 pp.293-305

Effect of a Floating Photovoltaic System (FPV) at Chungju Dam (Cheongpung Lake) on Water Quality

Hak Jun Kim, Suhknam Kwak1, Min Yoon2,Il-Kyu Kim3, Young-Sung Kim4, Dong-sub Kim4
Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
1Environ-Ecological Engineering Institute Co, Ltd. Busan 48058, Republic of Korea
2Department of Applied Mathematics,Pukyong National University, Busan 48513, Republic of Korea
3Department of Environmental Engineering,Pukyong National University, Busan 48513, Republic of Korea
4K-water institute, Korea Water Resources Corporation, Daejeon 34350, Republic of Korea
* Corresponding author: Tel: +82-42-870-7451, Fax: +82-42-870-7499


In this study we investigated the effect of a floating photovoltaic (FPV) system in Cheongpung Lake on water quality. The FPV with a tilt angle of 33° covered ca. 0.04% of surface area (97 km2) of Chungju Lake. The water qualities of the whole lake before and after installation of FPV were first compared. DO, BOD, TOC, and Chl-a of the whole lake were increased, while conductivity decreased after installation period at the significance level of 0.05. This change was probably due to the increased influx of nutrients by 40% resulting from increased precipitation during the same period. We also measured water quality parameters on May and Nov. 2017 at the FPV center (FPVC) and nearby control sites, and compared water quality. The result showed that the FPVC and nearby sites were not significantly different (p>0.05), demonstrating that the FPV does not cause a decline of water quality. The water temperature, light intensity, and phytoplankton community were also measured. The water temperature was not different between the sites, while the light intensity decreased to 27~50%. Despite reduced light intensity at FPVC, the phytoplankton standing crops and the number of species were not significantly different (p>0.05). However, in the early November samples, standing crops was significantly higher in FPVC than control with periphytic diatoms belonging to Aulacoseira genus being dominant. This may be due to the temporal water body behavior or local retention of current by FPV system. This study may provide a measure of future installation of a FPV system.

충주댐 (청풍호) 수상태양광 시설이 호수 수질에 미치는 영향

김학준, 곽석남1, 윤 민2, 김일규3, 김영성3, 김동섭4*
부경대학교 화학과, 1㈜ 환경생태공학연구원, 2부경대학교 응 용수학과, 3부경대학교 환경공학과, 4한국수자원공사 수자원연구원