Study on the interaction between engineering construction and ecosystem changes in the Longitudinal Range-Gorge Region

This paper takes the interaction between engineering construction and ecosystem changes as the main science issue.Based on the DPSIR(Drive-Press-State-Impact-Response)framework,this study ana- lyzes the interlinkage of interaction between engineering construction and ecosystem changes from the aspect of drive,press,state,impact and response,brings forward the interaction model,interaction scenario analysis method and interaction index(drive-response index,Ⅱ,drive-impact index,Ⅱ,im- pact-responee Index,Ⅱ,impact index,Ⅱ),and advances the corresponding calculation models and interaction Index system.And also this paper adopts the different interaction indexes to respect the Impact on and response to engineering construction,and takes the Manwan hydropower station and road traffic construction in the Longitudinal Range-Gorge Region(LRGR)as example to analyze and validate the interaction model.By the systematic analysis of the outcome,theⅡ,Ⅱ,ⅡarⅡof construction and operation of Manwan hydropower station are respectively 3.67,3.92,14.35 and 0.35. There is no remarkable variance of interlinkage elements in Interaction system,and exploitation of hy- dropower station benefits the sustainable development of regional environment and society based on the supposition of without considering the environment cost,diffusion effect,potential negative effect and potential responses of hydropower station construction.Through some case studies,the interac- tion model we built shows very good practical value in Interaction quantitative analyzing and interac- tion index system constructing.