Optimization of habitat protection area based on analytic hierarchy process (AHP) at Chongqing Reach in Wujiang Basin

The construction of hydropower stations will destroy or be disadvantage to environments, especially the cascade hydropower stations. How to find a similar suitable environments for habitat is an important content during protecting the ecological integrity. With the purpose of protecting the biological integrity of Chongqing Reach in Wujiang Basin, the paper chooses Chongqing Reach in Wujiang Basin as a study area, applies the analytic hierarchy process (AHP) on the basis of analyzing the condition of the main stream and chief tributary of Chongqing Reach, and selects seven factors, such as the kinds and quantity of fish resources, the hydropower development intensity, the extent of reservoir inundation, the population of the basin, etc. Through calculating and analyzing, Changxi tributary in Chongqing Reach of Wujiang Basin is the best site to establish habitat protection area.