RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2007, Vol. 16 >> Issue (1): 21-25.

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ON THE INFLUENCE OF INTAKE LOCATION ON TEMPERATURE DISTRIBUTION STRUCTURE OF RESERVOIR WITH SEASONAL TEMPERATURE STRATIFICATION

HAO Hongsheng, LI Kefeng, LI Ran, ZHAO Zaixing   

  • Received:1900-01-01 Revised:1900-01-01 Online:2007-01-20

Abstract:

To study the influence of lowtemperature water of hydropower projects effluent on water temperature distribution and aquatic ecosystem in the downstream of a dam, the water temperature distribution in the reservoir and the effluent water temperature at three different intake locations were predicted using laterally averaged twodimensional model in this paper. It is shown that the effluent water temperature from March to August decreased with the decrease of intake elevation, while from September to February in the following year increased with the decrease of intake elevation. It can be concluded that to a certain extent, layered intake can reduce the difference of water temperature between effluent and natural water, and mitigate the adverse effects of lower temperature effluent on aquatic ecosystem in the downstream of a dam. This study can provide a theoretical base for the assessment of environmental impact of water hydropower projects.

Key words: water temperature, twodimensional mathematical model, intake location, elevation, impact

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