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http://dx.doi.org/10.3741/JKWRA.2013.46.11.1115

Evaluation of Suspended Solids and Eutrophication in Chungju Lake Using CE-QUAL-W2  

Ahn, So Ra (Department of Civil and Environmental System Engineering, Konkuk University)
Kim, Sang Ho (Department of Civil and Environmental System Engineering, Konkuk University)
Yoon, Sung Wan (Department of Environmental Engineering, Chungbuk National University)
Kim, Seong Joon (Department of Civil and Environmental System Engineering, Konkuk University)
Publication Information
Journal of Korea Water Resources Association / v.46, no.11, 2013 , pp. 1115-1128 More about this Journal
Abstract
The purpose of this study is to evaluate the suspended solids and eutrophication processes relationships in Chungju lake using CE-QUAL-W2, two-dimensional (2D) longitudinal/vertical hydrodynamic and water quality model. For water quality modeling, the lake segmentation was configured as 7 branches system according to their shape and tributary distribution. The model was calibrated (2010) and validated (2008) using 2 years of field data of water temperature, suspended solids (SS), total nitrogen (TN), total phosphorus (TP) and algae (Chl-a). The water temperature began to increase in depth from April and the stratification occurred at about 10 m early July heavy rain. The high SS concentration of the interflow density currents entering from the watershed was well simulated especially for July 2008 heavy rainfall event. The simulated concentration range of TN and TP was acceptable, but the errors might occur form the poor reflection for sedimentation velocity of nitrogen component and adsorption-sediment of phosphorus in model. The concentration of Chl-a was simulated well with the algal growth patterns in summer of 2010 and 2008, but the error of under estimation may come from the use of width-averaged velocity and concentration, not considering the actual to one side inclination by wind effect.
Keywords
Chungju lake; CE-QUAL-W2; water temperature; suspended solids; eutrophication;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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