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Characteristics of Water Environment on Manun Reservoir
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 Title & Authors
Characteristics of Water Environment on Manun Reservoir
Nam, Gui-Sook; Jang, Jeong-Ryeol; Lee, Gwang-Sik; Yoon, Keung-Sup; Lee, Sang-Joon;
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Manun Reservoir, located in Andong district has the capacity of 2 million tons in irrigation water supply with the drainage area of . Manun Reservoir is over fifty year old, and shallow in depth. The ratio of drainage area (DA) to reservoir surface area (SA) as an effective physical parameter on water quality was 56.1 and was higher than those of other agricultural reservoirs. The ratio of reservoir storage (ST) to SA in Manun Reservoir was 4.79, and the mean depth was below 8m. Both ratios of DS/SA, total area (TA)/ST and ST/SA in Manun Reservoir were relatively higher than those in other agricultural reservoir and natural lakes in Korea. These physical parameters in Manun Reservoir, however, had a eutropic potential significance. Average of COD, IN, and TP in Manun Reservoir were 11.1 mg/L 1.426 mg/L, 0.093 mg/L, respectively. In the inflow stream of Manun Reservoir, the TN () was higher than those in reservoir. Only Lyngbya spp. was dominant in phytoplankton for this study period and Gymnodinium spp., Peridinium spp., and Cryptomonas spp. were dominant in zooplankton. According to the Carlson's trophic status index, Mnnun Reservoir was eutrophic in 1996, 1997, and 1999, and hypertrophic in 1998.
Manun Reservoir;physical parameter;water quality;trophic status index;
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