RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2009, Vol. 18 >> Issue (12): 1193-.

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COMPREHENSIVE EVALUATION ON THE ECOLOGICAL SYSTEM IN DISTURBED CONSTRUCTION AREA OF HYDRO JUNCTION

FANG Guohua1|2| XIA Chunfeng3| YU Fengcun1   

  1. (1.College of Water Resources and Hydropower Engineering of Hohai University| Nanjing 210098| China； 
    2.State Key Laboratory of HydrologyWater Resources and Hydraulic Engineering| Hohai University| Nanjing 210098| China； 
    3.Management Engineering Department of Yingtian College| Nanjing 210046| China)
  • Online:2009-12-20

Abstract:

According to the disturbing mechanism explaining how the construction of hydro junction affects the nearby environment， the comprehensive indicator system to evaluate ecological system was brought forward， RBF Neural Network was used to establish the ecological system comprehensive evaluation model in disturbed construction area of hydro junction， and  the paper took Nierji Hydro Junction as an example to do comprehensive evaluation in its disturbed construction area.Evaluation results showed that all the indicators have fallen below the lowest point during the construction period， especially the social progress indicators and landscape ecological indicators.These two indicators had the largest increase rate during the recovery process.Although the natural ecological environment has the strong stability， it is difficult to restore when outside interference exceeds the affordability of its own.RBF ecological evaluation model for disturbed construction area of hydro junction can evaluate the ecological status to provide the theoretical basis for ecological restoration and reconstruction，predict and evaluate state after treatment，and also provide a useful reference for other watercontrol project construction interference district ecological restoration and reconstruction/

Key words: hydro junction/ disturbed construction area/ evaluation indicator system for ecological evaluation/ RBF ecological evaluation model

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