RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2007, Vol. 16 >> Issue (1): 72-75.

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INFLUENCE OF GEZHOUBA DAM ON THE ECO HYDROLOGICAL CHARACTERISTICS IN THE MIDDLE REACH OF THE YANGTZE RIVER 

XU Tianbao, PENG Jing, LI Chong   

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

Abstract:

Hydropower projects built for social and economical development of a country may have various effects on aquatic ecology. It is thus both scientifically and socially important to evaluate the changes of hydrological processes in relation to this kind of projects. An index system was set up in this paper, including six ecohydrological characteristic indexes, that is, longterm variables, highflow variables, lowflow variables, movingaverage variables, variables related to the rise and fall of the hydrograph and monthly flow variables. By using the index system, changes in hydrological processes can be evaluated. The index system was applied in this paper to evaluate the changes of ecohydrological characteristics in the middle reach of the Yangtze River after the construction of Gezhouba hydropower project. It is shown that the construction and operation of Gezhouba Dam has obvious influence on the variables related to the rise and fall of hydrograph.

Key words: ecohydrology, index system, Gezhouba Dam

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