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http://dx.doi.org/10.15681/KSWE.2015.31.6.723

A Study on Spatial and Temporal Patterns of Water Quality in the Middle Area of the Nakdong River, Korea  

Na, Eun Hye (Water Quality Assessment Research Division, Water Environment Research Department, National Institute of Environment Research)
Park, Suyoung (Water Quality Assessment Research Division, Water Environment Research Department, National Institute of Environment Research)
Kim, Jongha (Water Quality Assessment Research Division, Daegu Regional Environmental Office)
Im, Seongsoo (HQ of Daeju Gyeongbuk Region, Korea Environment Cooperation)
Kim, Kyunghyun (Water Quality Assessment Research Division, Water Environment Research Department, National Institute of Environment Research)
Publication Information
Journal of Korean Society on Water Environment / v.31, no.6, 2015 , pp. 723-731 More about this Journal
Abstract
We investigated the spatial and temporal patterns of water quality in the Gangjung-Goryoung weir that is located in the middle area of the Nakdong river, Korea. The monitoring results indicated that there are discernible vertical differences in water quality during the pre- and post-monsoon periods (May to September). During this period, it was observed that the weak thermal stratification formed at the maximum level, and pH, Chl-a, and DO concentrations in the surface layer were higher than those in the bottom layer. This vertical difference was especially noticeable for DO concentrations: there were DO depletions at the bottom layer in late June to early August. During the summer monsoon period with heavy rainfall, there was a decline in vertical differences in water quality. From this study, it was suggested that continuous monitoring of vertical profiles could become a useful tool for identifying the spatial and temporal distributions of water quality and for developing the best management policy for water quality in the Nakdong river.
Keywords
Algal bloom; DO depletion; Gangjung-Goryoung weir; Nakdong river; Thermal stratification;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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