Study On The Demarcation Of Naturl Ecological Space In Lin’an

At present,the contradiction between the demand for a better life,a healthy ecological environment and the unbalanced development of ecological civilization is becoming more and more prominent,demonstrating ecological environmental protection is a long-term task.The natural ecological space protection,one of the important contents for the promotion of ecological civilization construction,have attracted more and more attention.Scientifically demarcating natural ecological space and formulating corresponding control measures can not only improve the ecological environment,make rational use of natural ecological space resources,but also provide the basis for the "bottom line" of regulatory implementation.Therefore,in the construction of "beautiful China",it is self-evident that the significance and effect of strengthening the protection of natural ecological space.Under this background,with the support of the related theories of sustainable development theory,this study combine status of land use and natural ecological environment in Lin’an District to research Lin’an District Natural Ecological Space Delineation,by the methods of literature review and comprehensive induction,GIS-assisted spatial analysis,natural breakpoint classification,evaluation of the spatial suitability of national land,evaluation of the importance of ecological protection,and the empirical research and analysis.This study gets the following results:(1)Evaluation of the spatial suitability of the land in Lin’an District.Constructing a land use spatial appraisal index system that includes ecological suitability,agricultural suitability,and construction suitability.The 3D Rubik’s cube model was used to obtain the spatial region of ecologically suitable areas,suitable agricultural areas,and suitable construction areas,which can be used as the basis for delineating the ecological space.(2)Evaluation of importance of ecological protection in Lin’an District.According to the purpose of ecological protection and regional ecological functions in Lin’an,the importance of ecological protection in Lin’an District was evaluated from the aspects of sensitivity of ecosystem and the safety of ecosystem Among them,the sensitivity assessment of ecosystem included two parts:the sensitivity of soil erosion and river banks.The importance of ecosystem included three parts:the importance of water conservation,soil and water conservation,and biodiversity conservation.Through analysis,it is concluded that different degrees of importance of ecological protection in Lin’an District serve as an important basis for delineating the natural ecological space in Lin’an District.(3)The results of the demarcation of the natural ecological space in Lin’an District and the proposed control of the district.Based on the above evaluation results,the relevant planning results was linked to determine the scope and grading of natural ecological space(general area,key area,and core area),and proposals were made for the control measures of ecological space in different areas.The total area of designated ecological space in the region is 264,856 hectares,accounting for 84.91%of the total area,of which the core area is 17,658 hectares,accounting for 6.67%of the ecological space,mainly distributed in statutory national and provincial-prohibited areas,and it’s strictly forbidden that all human activities which are useless for improving ecosystem quality;the area of key areas is 36,540 hectares,accounting for 13.80%of the total natural ecological space,mainly concentrated in national nature reserves,forest parks,scenic spots,drinking water source protection area,at the same time included some areas with high biodiversity,soil and water conservation,and high importance of water conservation.In the key areas,the scale and intensity of land use for the construction project are strictly controlled,except for major infrastructure,major people’s livelihood projects,ecological restoration,and ecotourism.Other development activities outside the project construction are prohibited;the general area is 210,658 hectares,accounting for 79.53%of the total natural ecological space.It is widely distributed in towns and villages and allows agricultural development activities,but the scale of development must be reasonably controlled.