Water Resources Management

, Volume 29, Issue 11, pp 4095–4110 | Cite as

Effects of Climate Change on the Movement of Turbidity Flow in a Stratified Reservoir

  • Hye Won Lee
  • Eun Jung Kim
  • Seok Soon Park
  • Jung Hyun Choi
Article
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Abstract

In this study, we investigated the effects of climate change on the movement of the turbidity flow in a stratified reservoir. Reservoir turbidity is primarily caused by the concentration of suspended solids in a watershed. Under the effects of climate change, which increases the frequency and intensity of extreme weather events in the Asian monsoon area, turbidity can be considered to be an essential water quality variable in a reservoir that supplies drinking water. We adopted a two-dimensional hydrodynamic water quality model coupled to a watershed model and used a future climate scenario applied to the Yongdam Reservoir in South Korea. To account for the uncertainty of climate change scenarios and the extent of the variation of both temperature and precipitation, three cases each from the 2050’s and 2090’s were selected for simulation. The simulations predicted that the significance of the summer stratification would produce a vertical circulation lower than 8 m in the warming reservoir of the 2090 scenario in comparison to 15 m in the 2050 scenario. The limited vertical circulation caused the density plume to spread within a depth of 8 m of the reservoir, isolating the upper water with high suspended solid concentrations from the hypolimnetic water. The results of this study provide the optimum horizontal and vertical location of the intake aqueducts to obtain drinking water with low turbidity during extremely heavy rainfall.

Keywords

Climate change Monsoon area Stratified reservoir Turbidity flow Watershed model 
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Notes

Acknowledgments

This work was supported both by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2009–0083527) and the RP-Grant 2013 funded by Ewha Womans University. In addition, we thank Dr. Byung-Sik Kim at KICT and Prof. Chang-Hoi Ho at Seoul National University, and the Center for Climate/Environment Change Prediction Research (CCCPR) for the supply of future climate simulation data.

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Hye Won Lee
    • 2
  • Eun Jung Kim
    • 3
  • Seok Soon Park
    • 1
  • Jung Hyun Choi
    • 1
  1. 1.Department of Environmental Science and EngineeringEwha Womans UniversitySeoulSouth Korea
  2. 2.Center for Climate/Environment Change Prediction ResearchEwha Womans UniversitySeoulSouth Korea
  3. 3.National Institute of Environmental ResearchIncheonSouth Korea

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