Study On The Ecological Protection System Of Terrestrial Ecosystem In Mountainous Areas About Expressway Based On Ecological Impact Domain

The construction of expressway is not only to promote economic and social development,but also have a profound impact on natural ecosystems and easily induced ecologicalproblems,such as landscape fragmentation, soil erosion, destruction of vegetation, heavy metalpollution and changes in biodiversity. These mountain ecosystems are fragile and sensitive. Wehave established a method what divided the scope of impact domain, have established a methodwhat divided the ecological functional zones of road regin.We build a standard of ecologicalprotection and build an ecological protection system of ecosystem.1）Both sides of50m, ecosystem of road reign is extremely sensitive. Both sides of50m~100m, it is more sensitive. Both sides of100m~200m,it is not sensitive.2）We use the leading systems analysis to analyze the ecological and environmentalproblems brought by the highway construction.The terrestrial ecosystem is divided into twoLevel2ecological subregions, three Level3ecological function regions, it means that II1-A01YiLing water conservation and ecological conservation of ecological environment in the Ribbon,II1-A02XingShan biological diversity and nature conservation functional areas of ecological environment and II2-B01BaDang soil and water conservation and scenic ecologicalenvironment functional area.3) Combined with the impact factor of the ecosystem, including soil erosion erosionmodulus, highway construction level, highway impact of the global scope and highways divisionof ecological function, we build a ecological protection system of ecosystem.4) We use the leading systems analysis to build a standard of ecological protection.5) We make the typical design and build a ecological protection system of ecosystem，based on the standard of ecological protection...