Author(s): Yafei Duan, Zhan Shan Kang, Rui Han
Linked Author(s): Yafei Duan
Keywords: River thermal regime, real-time, surface heat exchange, changing meteorological condition
Abstract: Based on the physical processes of heat transfer in rivers, a temperature dynamics model is formulated from the one-dimensional unsteady heat advection-dispersion equation. The model could predict the water temperature's response to the time-varying meteorological conditions through accurately calculating the heat exchange flux at the interface. The concept of equilibrium time lag is put forward to depict the delayed response of sectional-averaged temperature to the changing meteorological conditions. A realistic river channels, the intake channel of Dongfang power plant in China is used to test the model. Verification results showed that the proposed model could accurately capture the changes of meteorological conditions, and thus forecast the water temperature fluctuations accurately and efficiently. In the circumstance of global climate change and frequent occurrence of regional extreme weather, this model will provide a powerful tool for the precise simulation of river thermal regime
Year: 2017