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http://dx.doi.org/10.17663/JWR.2015.17.4.380

Flow Rate·Water Quality Characteristics of Tributaries and a Grouping Method for Tributary Management in Nakdong River  

Na, Seungmin (Nakdong River Environment Research Center, National Institute of Environmental Research)
Lim, Tae Hyen (Nakdong River Environment Research Center, National Institute of Environmental Research)
Lee, Jae Yun (Nakdong River Environment Research Center, National Institute of Environmental Research)
Kwon, Heongak (Nakdong River Environment Research Center, National Institute of Environmental Research)
Cheon, Se Uk (Nakdong River Environment Research Center, National Institute of Environmental Research)
Publication Information
Journal of Wetlands Research / v.17, no.4, 2015 , pp. 380-390 More about this Journal
Abstract
In this study, the major 38 tributaries in Nakdong River were monitored for flow rate and water quality in order to understand the characteristics of the watershed and to find improvement plan. The flow rate and water quality for each target tributary were evaluated based on the monitoring data in 2013~2014 using a statistical package SPSS-22.0. In addition, the tributary grouping method was conducted using a $BOD_5$ concentration/flowrate and TP concentration/flowrate monitoring data. The average values of $BOD_5$, $COD_{Mn}$, TP and TOC concentrations in Gumicheon, Gyeonghocheon, Jincheoncheon, Gisegokcheon, Yonghacheon and Yonghocheon located at Nakdong Waegwan and Nakdong Goryung watershed were high and in the grade of III or IV (5~8 mg/L). The Pearson correlation coefficients of TOC with $BOD_5$, $COD_{Mn}$, and TP were greater (r=0.8, p<0.01) than those of the other water quality parameters (12 species). The tributaries with high values of water quality parameters ($BOD_5$ > 3.0 mg/L, TP > 0.1 mg/L) and flowrate (Q > $0.1m^3/sec$) were selected for improving water quality according to the stream grouping method. Five tributaries (Gumicheon, Gisegokcheon, Yonghacheon, Yeongsancheon, Mijeoncheon and Yonghocheon) were classified as Group I, which require polices and plans for water quality improvement.
Keywords
Flow Rate; Pearson correlation coefficient; Tributary; Tributary Grouping Method; Water Quality;
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Times Cited By KSCI : 9  (Citation Analysis)
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