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A Study on the Water Quality Patterns of Unit Watersheds for the Management of TMDLs - in Nakdong River Basin -  

Park, Jun Dae (Water Pollution Cap System Research Division, Water Environmental Research Department, National Institute of Environmental Research)
Kim, Jin Lee (Water Pollution Cap System Research Division, Water Environmental Research Department, National Institute of Environmental Research)
Rhew, Doug Hee (Water Pollution Cap System Research Division, Water Environmental Research Department, National Institute of Environmental Research)
Jung, Dong Il (Water Pollution Cap System Research Division, Water Environmental Research Department, National Institute of Environmental Research)
Publication Information
Journal of Korean Society on Water Environment / v.26, no.2, 2010 , pp. 279-288 More about this Journal
Abstract
The water quality variations or changes are closely relevant to the characteristics of unit watersheds and have an effect on the attainment of their water quality goal. This study was conducted to analyze the water quality distribution and its change patterns of unit watersheds in Nakdong river basin. It revealed that 25 unit watersheds out of 41 showed the normality in water quality. Most of unit watersheds had a considerable variation in water quality, especially in the season of spring and summer but a little in terms of flow rate. Annual relative differences in water quality ranged from 13.0 to 26.6% with the maximum of 75%. 28 unit watersheds (62%) had the tendency to decrease in water quality as the flow rate increased while 13 (38%) to increase. The extension of standard flow led to considerable differences in water quality depending on its ranges, which meant uncertainties might be included in the process of TMDL development. It is suggested that annual average flow rate should be chosen as a standard flow in the area where the water quality change has little relation to the flow rate.
Keywords
Nakdong river basin; Standard flow; Total maximum daily loads; Unit watershed; Water quality patterns; Water quality variation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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