Research On Quantitative Recognition And Optimization Of Production-Living-Ecological Spaces Based On Multisource Data

At present,land use conflicts are becoming increasingly intense,and the coordination of multi-functional land has become an important element of land resource management.China proposed that rational planning of the land spatial structure should be carried out in a way that is in line with the development principles of “intensive and efficient production space,livable and appropriate living space,and a green and gorgeous ecological space”,in order to regulate production and construction activities,strengthen ecological and environmental protection,improve living conditions,and attain socioeconomic sustainability.Hence,the identification and optimal regulation of production-living-ecological space has both theoretical research value and practical application prospects.Taking Mingshan District,Ya’an City as the study area.Based on the perspective of the production-living-ecological functions of land use,the study integrates multi-source data to build a spatial function evaluation index system for the“production-living-ecological”,quantitatively measures the production,living and ecological function values of the research units using an entropy-weighted-multi-indicator comprehensive evaluation model,calculates the space function pattern of different research units according to the dominant function calculation method and natural breaks classification method,and identifies the “production-living-ecological” spaces.The distribution characteristics of the “production-living-ecological” spaces were revealed by applying a grid-based kernel density analysis model,and the correlation and aggregation characteristics of the “production-living-ecological” functional spaces were revealed by applying spatial autocorrelation analysis.On this basis,the GIS spatial analysis method is used to explore the optimal planning for the rational development of the“production-living-ecological” spaces by combining the NRCA(normalized revealed comparative advantage index)and overlay analysis of the policy schemes of the study area,and to make corresponding recommendations.The main results of the study are as follows:(1)By applying the entropy-weighted-multi-indicator comprehensive evaluation method to assess the “production-living-ecological” functions based on multi-source data,a total of 12 “production-living-ecological” spatial types in the Mingshan District were identified according to the functional classification pattern of each unit.Among them,the three-functional combination pattern is the main mode,accounting for 97.28% of the total spatial coverage,which indicates that Mingshan District is tending to maintain the integration of production,living and ecology in general,which also means that special attention has to be taken to control the balance of each function in the space and avoid inefficient land use.In terms of the proportion of the area covered by each spatial type,the ecology-production balance-living sub-spatial area accounts for the largest percentage,at42.98%,indicating that the overall spatial structure of the Mingshan District is currently dominated by ecological space and production space,and that the land use function is reflected in both maintaining ecological stability and developing social economy.(2)The distribution landscape of the “production-living-ecological” spaces in Mingshan District is reflected by the grid-based kernel density analysis.By integrating the kernel density distribution characteristics of various spaces,it can be seen that the production function dominant space and the living function dominant space have obvious spatial adjacency,and the two have obvious spatial complementarity with the ecological function dominant space,and the distribution characteristics of various function combination models are “local agglomeration and global dispersion” in space.The analysis shows that the integration of ecological and production functions,production and living functions is better,while the integration of living and ecological functions is worse,so when making functional partition,it is necessary to pay attention to the complementarity and integration of each function.(3)The Global Moran’s I index was used to analyse the spatial correlation and agglomeration of the “production-living-ecological” functions.The test results show that the geographical distribution of production,living and ecological functions in the Mingshan District is characterised by agglomeration,and in general shows a relatively significant.In other words,the level of “production-living-ecological” functions is not randomly and dispersively distributed among the neighbouring units,but there is a clustering trend among the neighbouring units.Local autocorrelation tests for each function utilising hot spot analysis show significant differences in the distribution landscape of different functional agglomerations.(4)On the basis of the functional evaluation,and taking into account the NRCA index,the policy and development status of Mingshan District,the spaces have been optimised as the ecological conservation region,the production protection region,the main living-production ecological enhancement region,the production-ecological complex-living enhancement region and the ecological-living complex-production enhancement region.The ecological conservation region is mainly an urban drinking water source,which belongs to the red line of ecological protection for soil and water conservation,and should obey the corresponding management regulations,strictly protect the ecological environment and ensure water quality safety.The production protection region plays an agricultural production function and should implement a strict cultivated land protection policy,strengthen the protection and efficient use of land resources,and guarantee food security and the supply of important agricultural products.The production-ecological complex-living enhancement region is mostly distributed in the townships(streets)where the tea industry is well advanced,and can strengthen the development of regional special industries.Ecological-lving complex-production enhancement region is primarily located in areas with a superior ecological environment,which can deeply explore and develop the unique ecological tourism resources,and strengthen ecological environmental protection and green production,and improve the quality of human life.The production and ecological function of the main living-production ecological enhancement region is weaker and may improve the ecological environment and boost social production to harmonise spatial use.