Reserach On Ecological Restoration Planning Of Village Land Based On Ecological Sensitivity

Lucid waters and lush mountains are invaluable assets.The ecological protection and restoration of the landscape,lakes,grasslands and forests are important guarantees for maintaining national ecological security.Land and space ecological restoration is a major measure to build a beautiful land and promote the construction of ecological civilization.The land space ecological restoration has a remarkable scale.Different territorial space scales have different territorial space ecological restoration contents and technical methods.The village is the basic scale of land and space ecological restoration,and its land and space ecological restoration is of great significance to the construction of beautiful villages and the implementation of rural revitalization strategies.At present,the implementation and research of land and space ecological restoration in China has just started.There is a lack of in-depth research and practice on the overall concept of land and space ecological restoration,ecological sensitivity identification and evaluation,restoration goals and planning layout.Research on spatial ecological restoration planning and layout is rarely involved.This article takes Dunzichang Village,Guangdong Province,which is unique in natural resources and environment,as an example,using high-resolution remote sensing images and data of the "three tones" of the country,using remote sensing interpretation,GIS spatial analysis,analytic hierarchy analysis,weighted overlay analysis and planning techniques And other methods,combined with field research and current situation analysis,selected the ecological sensitivity evaluation index system and single-factor evaluation model,carried out the evaluation of land space ecological sensitivity,divided the ecological sensitive areas,and constructed a framework for land spatial restoration planning based on ecological sensitivity.Important ecological restoration project and its planned layout.The main findings are as follows:(1)According to the characteristics of the natural resources and ecological environment of Dunzichang Village,build an indicator system for the assessment of the national land space ecological sensitivity.The main indicators include elevation,slope,water area,road traffic,village construction and land use type.(2)AHP and expert scoring method are used to determine the weight of evaluationfactors,and GIS spatial analysis technology is used to construct a single factor evaluation model.Based on the single-factor evaluation results,the weighted superposition method was used to conduct comprehensive ecological sensitivity evaluation,and the study was divided into high-sensitivity areas,medium-sensitivity areas,low-sensitivity areas,and insensitivity areas.The area of high-sensitivity areas accounts for 12.23%,mainly rivers and buffer zones around rivers;the area of moderate-sensitivity areas accounts for 59.1%,widely distributed in villages,mainly woodland,agricultural land and buffer areas around rivers;areas of low sensitivity areas account for 27.24%,the main land types are forest land and paddy fields close to village settlements;the area of insensitive areas only accounts for 1.43%,and the main areas are village construction land,highway land and areas near village settlements.(3)According to the results of ecological sensitivity analysis,the overall framework of the national space spatial ecological restoration plan in the study area is constructed.The main contents are: on the basis of analyzing the importance of the national land spatial ecological restoration in different areas of the study area,the research area is divided into different levels Ecological restoration area;corresponding ecological restoration projects for different levels of ecological restoration areas;planning and implementing areas for different ecological restoration projects in combination with the current status of land use;carrying out ecological restoration projects to restore the ecological environment.(4)The land and space ecological restoration area in the study area is divided into four levels.Different ecological restoration areas implement corresponding ecological restoration projects according to their characteristics,such as river ecological restoration projects,water environment treatment projects,water and soil conservation projects and land improvement projects.Among them,the main land use types of the Grade I ecological restoration area are rivers and the surrounding buffer zone of the river,and the river ecological restoration project,water environment treatment project and soil and water conservation project are planned to be carried out;1.Forest land ecological restoration project;Grade III ecological restoration area is mainly agricultural land and part of forest land.Land remediation project and forest land ecological restoration project are plannedto be carried out;Grade IV ecological restoration area is mainly village construction land,highway land and areas near village settlements.Plan to carry out land improvement projects.(5)For different types of ecological restoration projects,according to the comprehensive ecological sensitivity,combined with the current status of land use,make overall arrangements for the implementation of various projects.In the specific implementation of the national land space ecological restoration project,the principle of protection first and natural restoration should be adhered to,the relationship between protection,maintenance and restoration should be considered as a whole,and the protection measures and restoration measures should be reasonably arranged.This study takes specific villages as the research object and discusses the national land space ecological restoration and its planning layout from the perspective of ecological sensitivity,hoping to provide an intentional reference for technical methods and ideas for the implementation and research of the national land space ecological restoration in our country.