Indicators and Fuzzy Cluster Method for Comprehensive Environmental Impact Assessment of Large scale Water Conservancy Engineering

Taking "Two Rivers and Two Stations" engineering in the Chao Lake catchment as an example, the indicators and fuzzy cluster method for comprehensive environmental impact assessment of large scale water conservancy engineering are discussed. The engineering effects to regional society, economy and eco environment were analyzed according to the engineering location and characteristics, and to regional environmental background. Based on these, main effect factors were determined through field investigation, analogical analysis, expert consultation and analytic hierarchy process. The compressive environmental impact assessment of the engineering was carried out by using fuzzy cluster analysis.