RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2017, Vol. 26 >> Issue (05): 738-746.doi: 10.11870/cjlyzyyhj201705011

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TEMPORAL AND SPATIAL CHARACTERISTICS OF WATER TEMPERATURE IN XIANGJIABA RESERVOIR

LONG Liang-hong1, XU Hui1, JI Dao-bin1, YAN Meng3, LIU De-fu1,2   

  1. 1. College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;
    3. Pearl River Hydraulic Research lnstitute, Guangzhou 510611, China;
    2. Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China
  • Received:2016-10-12 Revised:2017-01-13 Online:2017-05-20
  • Supported by:
    National Basic Research Program of China (2014CB460601);International Science and Technology Cooperation Program of China (2014DFE70070);National Natural Science Foundation of China (51509086);National Science and Technology Major Project(2014ZX07104-005-01)

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Abstract: Water temperature is one of the most important factors in the evaluation of water environment, which plays an important role in the physical, chemical and biological processes. In order to analyze the water temperature distribution in the Xiangjiaba Reservoir, the longitudinal/vertical two-dimensional water temperature model with CE-QUAL-W2 was constructed. The water temperature structure in the Xiangjiaba Reservoir was simulated by the model with the monitoring data. The results showed that seasonal stratification was present in the Xiangjiaba Reservoir, the upper middle water (60 m above) was heated quickly by the warming-up inflow water and the air temperature from April to June, followed by increasing temperature difference between surface and bottom water. The temperature difference reached 10℃ at the end of June, and the vertical stratification became more severe. As the flood discharge in July and August increased, the bottom temperature in the Xiangjiaba Reservoir rose rapidly and the middle isothermal layer increased as well, and the water temperature difference between the surface and the bottom decreased to 2℃. The main factors affecting the temperature distribution in the Xiangjiaba reservoir included inflow water temperature, meteorological, intake elevation and discharging patterns, which affected the whole aptitude, the surface water temperature and vertical temperature stratification structure, respectively.

Key words: Xiangjiaba Reservoir, water temperature, CE-QUAL-W2, stratification

CLC Number: 

  • TV697
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