GIS Is Applied To The Simulation Study Of Rural Green Corridor Construction In Plateau Lake Basin Area

The rapid development of rural economy made the rapid development of urbanization in rural areas accelerated,greatly improving the quality of farmers life.However,the development of urbanization inevitably changed the natural,economic and social aspects of the rural areas and made the original ecological landscape of the rural areas undermined.Rural green corridors can play a better role in rural environmental protection and management,promote rural economic activities and strengthen social assets in rural areas.In addition,green corridors can promote rural sustainable development given the inter linkages between these resources.In this paper,with the support of remote sensing and GIS technology,taking Jiangchuan District as the research object,a research on the simulation construction of rural settlement green corridor in Jiangchuan District was made as follows:1?Systemically expounded the concept,classification and function of green corridor and the research status at home and abroad,as well as the significance of constructing green corridor.2?Analyzed the basic conditions of green corridor construction:(1)Through the study on the spatial pattern of rural settlements,it is found that the number of settlements was less in the slope of 0-8°,because the cultivated land was favored in the gentle slope which was the source of most high-quality cultivated land resources,while the majority of human settlements were concentrated in the slope of 8-15°range.With the increase of slope there were still settlements,but the number dropped sharply.(2)Through the analysis of water extraction,it is found that settlement distributed towards the water source,the number of settlements was the largest and the density was highest within 500 meters from the water source.Within a distance of more than 500 and less than 1000 meters,the number of settlements dropped sharply.Affected by the "two lakes",the density of the settlements around the two lakes was the highest.The whole pattern presented the spatial form of "South dense,North sparse".(3)Through the study of landscape pattern,it is found that in areas where the number of settlements was large and the density was high,the human activities were frequent and the development speed was relatively fast,leading to the more serious landscape fragmentation;For example,the main street belongs to the administrative district where the urban area is located,the development of the urban area has caused the fragmentation of the landscape to increase.3?The basic content of analytic hierarchy process on green corridor construction suitability analysis was expounded,and the advantages and disadvantages of analytic hierarchy process were introduced.The index system of green corridor suitability analysis was established,the green corridor suitability level model was set up,and then the evaluation index was scored to obtain the weight value of the evaluation factor,finally the evaluation results were comprehensively solved.The attributes were divided into five levels: low,lower,medium,higher and high,and got the result of green corridor suitability analysis in the study area.4?Based on the results of green corridor suitability analysis and evaluation,this paper proposed the overall strategic framework of green corridor construction from four aspects of construction principles,components,route selection and overall construction,and simulated the construction of rural green corridor.