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http://dx.doi.org/10.15681/KSWE.2017.33.3.341

Spatial Distribution and Improvement of Water Quality in the Youngrang Lake  

Huh, In-Ryang (Gangwon Institute of Health and Environment)
Yi, Geon-Ho (Gangwon Institute of Health and Environment)
Jeong, Won-Gu (Gangwon Institute of Health and Environment)
Kwon, Jae-Hyouk (Dept. of Earth and Environmental Engeneering, Kangwon National University)
Publication Information
Journal of Korean Society on Water Environment / v.33, no.3, 2017 , pp. 341-347 More about this Journal
Abstract
From 2014 to 2016 water quality survey results according to the location and depth of Youngrang Lake are as follows: Distribution of dissolved oxygen in the water depth was investigated by the middle section and the downstream 1st, 3rd, 5th, when investigating bottem 1m interval anoxic layer. In organic matter and nutrient concentration distribution COD upstream 2.8 mg/L, middle section 4.2 mg/L downstream 4.1 mg/L, more than two times higher in bottem layer and TP concentrations showed a similar trend with COD, upstream of 0.047 mg/L, middle section was 0.051 mg/L, downstream of 0.059 mg/L. There was a difference in salinity every survey period the average salinity is lowest with 28.5‰ when the second survey. And the highest with 32.1‰ in the fourth investigation. Korean trophic state index($TSI_{KO}$) were showed eutrophic conditions in the middle section and downstream else showed mesotrophic state in the entire period. In order to evaluate the cause of water pollution Youngrang lake, regression analysis of the relationship between salinity and DO, COD, TN, TP, Chl-a results, $R^2$ is from 0.63 to 0.95 Youngrang lake water quality was found to have a close relationship with salinity due to inflow of seawater. As a result, in order to improve the quality of Youngrang lake efficient incorporation of the amount of water through the seawater influent as it is considered the key.
Keywords
Eutrophication; Salinity; Youngrang Lake; $TSI_{KO}$;
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Times Cited By KSCI : 2  (Citation Analysis)
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