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Modeling hydrothermal, suspended solids transport and residence time in a deep reservoir

  • W. C. LiuEmail author
  • W. B. Chen
Original Paper

Abstract

This article presents the modeling of hydrothermal characteristics and suspended solids in a long and large-volume reservoir with a highly fluctuating water level. A laterally averaged two-dimensional hydrothermal and water quality model was configured for the Shihmen Reservoir in northern Taiwan. The model was validated with measured data of water surface elevation, water temperature, and concentration of suspended solids in 2006. The results show that the numerical model was able to reproduce the measured data. The validated model was then used to investigate the effects of water withdrawal schemes at different depths and to estimate the residence time in the reservoir. When water is withdrawn from a great depth, the relatively warm water from the upper layers can replace that in the deep layers, thereby facilitating heat transfer from the surface to the deeper layer. Bottom-water withdrawal results in a lower concentration of suspended solids compared with withdrawal from depths of 20 and 40 m. The simulated results show that the residence time is approximately 154 days in the Shihmen Reservoir.

Keywords

Hydrodynamic Numerical model Validation Water level Water quality 

Notes

Acknowledgments

The research was conducted as part of a grant supported by the National Science Council, Taiwan, Grant No. 96-2628-E-239-012-MY3. This financial support is greatly appreciated. The authors would like to thank the Northern Region Water Resources Bureau for providing the measured data used in the model validation.

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Copyright information

© CEERS, IAU 2012

Authors and Affiliations

  1. 1.Department of Civil and Disaster Prevention EngineeringNational United UniversityMiao-LiTaiwan
  2. 2.Supercomputing Research CenterNational Cheng Kung UniversityTainanTaiwan

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