| Land space is an important carrier to support social and economic activities,human production and life,and the construction of ecological civilization.Since the reform and development,China’s economic construction supported by land space has made remarkable achievements.However,with the amazing speed and extensive industrialization and urbanization process,the problems of environmental pollution,resource depletion,pattern disorder and functional imbalance in the land space are becoming more and more serious,which restricts the realization of the goal of land space high-quality development.The report of the 18 th National Congress of the Communist Party of China clearly pointed out that it is necessary to optimize the development pattern of land space,promote the intensive and efficient production space,moderate living space and the beautiful ecological space.However,due to the relatedness,heterogeneity and composite characteristics of land space,compound or symbiotic functional spaces are common.Therefore,correctly identifying the land spatial pattern,optimizing the land spatial layout,giving play to the symbiotic function of land space,and establish an effective control and efficient allocation mechanism for the development and utilization of land space is an important proposition to solve the problems of land spatial imbalance and ecological environment imbalance,and achieve high-quality regional development.Given this,following the logical thinking of “theoretical analysis-model construction-empirical analysis”,this thesis constructs the structure and overall framework of the land space symbiotic system in Henan Province from the perspective of symbiosis.This thesis uses GIS spatial analysis,model evaluation,statistical analysis and other methods,combined with multi-temporal remote sensing images,land use change data and statistical yearbook data,etc.Based on the analysis of the development status and evolution characteristics of land space in Henan Province,this thesis explores the spatiotemporal correlation characteristics and symbiosis mechanism between land space development and eco-environment,identifies the symbiotic function types of land space,and then the spatiotemporal characteristics and influencing factors of the “production-living-ecological” functions of land space were analyzed.At the same time,based on the level of resource and environmental carrying capacity and the types of symbiotic functions,a symbiotic model-based optimization scheme of land spatial function was constructed.Finally,the comprehensive zoning types of land space in Henan Province were condensed,and the corresponding land spatial optimization paths and management strategies were proposed.The main research contents and conclusions of the thesis are as follows:(1)Theoretical analysis believes that a new land space optimization analysis framework can be constructed based on the symbiotic perspective,and then a harmonious symbiotic land space can be proposed.On the one hand,the efficient display of land space functions requires coordinating the internal associations and functional relationships of various symbiotic units in the land space.Further,optimize the symbiotic interface such as the transportation network and information network within the land space,improve the symbiosis environment of the land space,and select the ideal land spatial symbiosis mode to support the high-quality development of the region.In addition,from the perspective of the symbiosis mechanism of land space,the symbiosis mechanism of “stress-driving-coordination” and the symbiosis model of “parasitic-commensalism-asymmetric mutualism-symmetrical mutualism”was put forward.Finally,in terms of the symbiotic system function,the theoretical analysis found the symbiotic relationship of the internal interaction and cross-coexistence of the “production-living-ecological” functions,and clarified the connotation and realization logic of the symbiotic function.(2)The status quo diagnosis shows that the land spatial structure of Henan Province has certain regularity and significant differences in the change of land use types and the distribution of production-living-ecological pattern.The analysis of land use structure and spatial characteristics shows that the cultivated land of Henan Province is mostly distributed in the Huanghuaihai Plain,Nanyang Basin and other low-lying areas.The forest land is mostly adjacent to the higher terrain in northwestern Henan,southwestern Henan,and Tongbai-Dabie Mountains.The urban and rural industrial and mining land is sporadically distributed and locally concentrated.Analysis of the distribution of “production-living-ecological” spaces,it is found that the agricultural production space and green ecological space in Henan Province account for a relatively high proportion,reaching more than 80%.Among them,agricultural production space accounts for more than 60%,indicating that Henan Province has a good resource endowment and agricultural foundation,and agricultural production is still the main direction of utilization in the Henan Province.(3)Correlation measurement found that there was a strong coordination relationship and symbiosis mechanism between the land space development and the eco-environment,and the interaction strength of each element between the two systems showed the characteristics of stages and differences.Firstly,by building a comprehensive evaluation index system for land space development and eco-environment,this thesis found that the overall level of land space development from 2000 to 2018 has been stable and progressed,and there are regional gradient differences.The level of the eco-environment first slowly decreased and then increased,showing a clear pattern of regional dependence.Secondly,the coupling coordination model was used to evaluate the spatiotemporal pattern of the coupling coordination between land space development and eco-environment,which found that Henan Province as a whole was on the verge of disorders,and barely coordination,and the degree of coordination changes in some areas with time.The spatial coupling coordination degree shows the characteristics of “coordinated transition in the central and eastern regions,and coordination enhancement in the central and northwestern regions”.Finally,using the spatial autocorrelation method,the spatial correlation pattern of the coupling and coordination between the land space development and the eco-environment was analyzed.The results show that there is a significant positive correlation between land space development and eco-environment coupling coordination degree,and has obvious agglomeration characteristics.(4)The function identification shows that from 2000 to 2018,the production function and ecological function of Henan Province showed a gradual growth trend,and the living function showed an evolutionary characteristic of first shrinking and then increasing.In terms of spatial structure,it is found that the spatial gradient of production function and ecological function is significantly different,and the living function gradually weakens from the municipal area to the outside.In terms of evolutionary characteristics,it is found that from 2000 to 2018,the production function of 24.39% of the counties was significantly weakened,the living function of86.99% of the counties was improved,and the ecological function developed steadily,and the weakened area only accounted for 5.69%.In addition,the analysis of the driving mechanism found that food security,social security,and ecological conservation are the important factors affecting “production-living-ecological”functions,followed by economic development and ecological services.Finally,using the three-dimensional magic cube evaluation model,the symbiotic functional types of land space in Henan Province are identified.Among them,the production function dominates and other functional improvement type,the ecological function dominates and other functional improvement type,and the production-living-ecological symbiotic function type are the main symbiotic function type of land space in Henan Province,which are concentrated in the regions of East-Central,North and West Henan.(5)Suggestions for optimizing management and control,from the three dimensions of resource carrying capacity,eco-environment carrying capacity,and soci-economic carrying capacity,an evaluation framework for the optimization of land space functions based on resource and environmental constraints,which divides Henan Province’s land space into 15 types of functional optimization.Among them,the number of counties with agricultural orientation-symbiosis function accounts for16.26%,and the number of counties with agricultural orientation-production leading,construction orientation-symbiosis function and backup orientation-symbiosis function account for 12.20%,13.82% and 12.20% of the province,respectively.Furthermore,based on the basic geographical conditions and dominant development patterns of Henan Province,and based on the principle of regional morphological similarity,a comprehensive zoning scheme for land space is formed.The comprehensive zoning types include key development zones of production and living in central cities,advantageous development zones of production and living in sub-central cities,production and living agricultural development area of East Henan Plain,production and ecological agricultural development area of Northern and Western Henan Plain,production and ecological agriculture development area of Nanyang Basin in Southwest Henan,ecological reserve area of Taihang Mountain in Northern Henan,production and ecological reserve area of the mountainous area of West Henan,and production and ecological reserve area of Tongbai-Dabie Mountain.Finally,the research puts forward the optimization path,control strategy and relevant countermeasures to realize symbiotic development of land space comprehensive zoning. |
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