Research On The Optimization Of Territorial Spatial Pattern In Nayong County Based On The Functions Of "Production-living-ecological"

With the rapid development of urbanization,the contradiction between the expansion of production and living space and ecological environmental protection has become increasingly prominent,which has brought a severe test to the sustainable development of the regional economy and the maintenance of the ecological environment.Based on this background,the state proposes the specific content of strengthening the construction of ecological civilization,and rationally distributes the "production-living-ecological" space through the implementation of national land space planning,so as to coordinate the spatial conflict of "production-livingecological".Based on this background,this paper selects Nayong County,Bijie City as the research area,and firstly analyzes the characteristics of the spatial scale pattern of "production-living-ecological" in Nayong County;Secondly,quantitatively evaluating the "production-life-ecological" function of Nayong County’s territorial space,with the size of 1 km by 1 km grid as evaluation unit.Finally,optimizing the zoning of the territorial spatial pattern of Nayong County.The main research contents and conclusions of this paper are as follows:(1)On the basis of the existing research on the division of "production-livingecological" space types,combined with the existing data types and the economic and social situation of the study area,the various types of land in the study area are classified and merged.Using the land use change data in 2010,2014 and 2018,this paper analyzes the changes in the spatial structure and layout of land in Nayong County.The results of the study are as follows: From the perspective of scale changes,the spatial structure of the "production-living-ecological" in Nayong County is relatively stable at the three time points,and ecological space is the main type of space,accounting for more than 50%;followed by production space and living space,accounting for more than 46% and less than 3%,respectively.From the perspective of the spatial pattern,the distribution of the spatial pattern of the land at the three time points is relatively consistent,and there has been no significant change.Among them,the production space and ecological space are relatively scattered,and the degree of aggregation is poor;the living space shows a clear degree of aggregation,mainly distributed in Yongxi Street,Wenchang Street and Juren Street in the central county of the study area,and Yangchang Town in the southwest.And the core of the living space gradually expands to Juren Street.(2)With reference to the existing research on functional evaluation,the“production-living-ecological” functional evaluation index system was established.Taking 2018 as the research time point,the extreme value standardization method,the mean square error decision-making method and the comprehensive evaluation model were used to evaluate the function of "production-living-ecological" in Nayong County,with the size of 1 km by 1 km grid as evaluation unit.From the perspective of the functional pattern of "production-living-ecological",the distribution of high-value areas of production functions is relatively scattered,mainly in areas with relatively gentle terrain conditions and high levels of agricultural facilities.The high-value areas of living functions are mainly located in Yongxi Street,Wenchang Street and Juren Street in the county seat.The high-value areas of ecological functions are mainly located around the Nayong Dove Tree Nature Reserve in the southeast and the Jiudongtian Scenic Area in the northeast.Judging from the spatial autocorrelation of the functions of "production-living-ecological",the functions of "production-livingecological" in Nayong County are related in geographical space,and show an obvious positive correlation.(3)Use the comparative advantage index to calculate the dominant advantage function of each evaluation unit.The comparative advantage function of each evaluation unit is superimposed and analyzed,and six kinds of advantage function combinations in the study area are obtained,namely,the comparative advantage area of production function,the advantage area of living function,the advantage area of ecological function,the area of production-living function advantage,the area of production-ecological function advantage,and the area of living-ecological function advantage.On this basis,take the administrative village as a unit to summarize the leading functions of the statistical area,and optimize the zoning.Finally,the research area is divided into four types of optimization and improvement,which are divided into ecological conservation area,production main-living ecological improvement area,production and living main-ecological improvement area,and living main-production ecological improvement area.