RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2017, Vol. 26 >> Issue (8): 1208-.doi: 10.11870/cjlyzyyhj201708011

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LEVEL Ⅰ AND Ⅱ AQUATIC ECOREGIONALIZATION IN THE #br# WATER SOURCE AREA OF DANJIANGKOU RESERVOIR

HU Sheng，XIA Fan，ZHANG Ai-jing，GONG Zhi-juan，ZHOU Zheng， WANG Ying-cai   

  1. (1. Water Environment Monitoring Center of Yangtze River, Wuhan 430010, China; 2. Construction Management
    Bureau of South to North Water Diversion Project, Beijing 100038, China; 3. Water Quality Monitoring Center of
    Fengdu County, Chongqing 408200, China)

  • Online:2017-08-20

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Abstract:

Delineation of aquatic ecoregion is the foundation of“zoning, grading, staging and classification”management of water environment in river basin．With the elevation, 
drought degree, the average annual runoff as the level I delineation indicator, land use, soil type, slope, the per capita GDP as the level II delineation indicator, the water 
source area of the Danjiangkou Reservoir was divided into 6 level I aquatic ecoregions and 19 level II aquatic ecoregions. Comparison of different ecoregions in aquatic habitat  conditions and  community  structure of zoobenthos, significant differences were found. Though some habitat indicator was similar between different second ecoregions, there were 
significant differences in the community structure of zoobenthos, which suggests that the delineation scheme is scientific and reasonable, and should be a good idea for the  cosystem protection and water resources management of  the water source area of the Danjiangkou Reservoir.
Key words：aquatic ecosystem; ecological function regionalization; water resource;  water source area of Danjiangkou

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