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KMID : 1024520220310050373
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Journal of the Environmental Sciences
2022 Volume.31 No. 5 p.373 ~ p.388
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Analysis Temporal and Spatial Changes of Water Quality in Domestic Hydropower Dam Reservoirs
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Park Kyoung-Deok
Kang Dong-Hwan
Jo Won-Gi
Yang Min-June
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Abstract
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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.
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KEYWORD
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Hydropower dam, Water quality, Water depth, Seasonal change
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