Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Calibration and Verification of CE-QUAL-W2 Model for Measuring Water Quality in the Daecheong Reservoir

대청호 저수지 수질해석을 해석을 위한 CE-QUAL-W2 모형의 검보정

  • Ha, Sung-Ryong (Department of Urban Engineering, Chungbuk National University) ;
  • Lee, Jae-Yil (Department of Urban Engineering, Chungbuk National University)
  • Received : 2008.09.13
  • Accepted : 2008.11.29
  • Published : 2008.12.01
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Abstract

This paper aims to understand the effects of a turbidity flow intrusion on eutrophication in Daecheong Dam Reservoir. CE-QUAL-W2, a two-dimensional hydrodynamic and water quality model, is applied. The elevation of the reservoir water surface is used to validate the hydrodynamic model parameters and maximum fluctuations in the water surface elevations reaches about 1 m in the reservoir. During the heavy storm season, July, the thermocline submerged to less than 30 m below the surface. The thickness of the thermocline also reduced to 10 to 15 m. While the average TSS in June, the beginning of the monsoon was still low but it peaked in July due to heavy rainfall. Vertical profiles of the TSS regime in July indicated higher concentration in upper water layers and then the regime moves gradually downward in accordance with the time lapse. Due to the dam spillway opening, high concentrations of TSS attributed to storm turbidity ascended to the upper water layer by following the upward current movement and then, the regime precipitated to a layer below 30 to 40 m after September.

Keywords

References

  1. Chung, S. W., Park, J. H., Kim, Y. K., Yoon, S. W., 2006, Application of CE-QUAL-W2 to Daecheong Reservoir for Eutrophication Simulation, Korean Society on Water Quality, 23 (1), 52-63.
  2. Ha, S. R. and Kim, S. Y., 2005, Improvement of Wasp hydraulic module for a stratified reservoir, Proceedings of COE Joint Symposium on Environment Engineering among Hokkaido University, Chungbuk National University and Bandung Institute of Technology, Hokkaido, Japan.
  3. Leon, L. F., Lam, D. C., Mc Crimmon, C., and Swayne, D. A., 2003, Watershed management modeling in Malawi: Application and technology transfer. Environmental Modeling and Software, 18, 531-539. https://doi.org/10.1016/S1364-8152(03)00028-8
  4. Liu, W. C., Kuo, J. T., and Kuo, A. Y., 2005, Modeling hydrodynamics and water quality in the separation waterway of the Yulin offshore industrial park, Taiwan. Environmental Modeling and Software, 20(3), 309-328. https://doi.org/10.1016/j.envsoft.2003.12.013
  5. Lung, W. S., 2001, Water quality modeling for waste load allocations and TMDLs, John wiley & Sons Inc., 333.
  6. Pastres, R. and Ciavatta, S., 2005, A comparison between the uncertainties in model parameters and in forcing functions: its application to a 3D water-quality model. Environmental Modeling and Software, 20(8), 981-989. https://doi.org/10.1016/j.envsoft.2004.09.010