| Since the Eighteenth National Congress of the Communist Party of China,the construction of ecological civilization and new development concepts have become the focus of the whole people.At the same time,the important tasks of the restoration of the protection,development and utilization of land and space have also been widely concerned.Especially after the delineation of production space,living space,and ecological space proposed by relevant national ministries and commissions,and the establishment of a spatial planning system,ecological space,as an important carrier of urban functions,is directly related to the strength of urban functions and the quality of development.As an important city in the Hefei metropolitan area,Chaohu City has a rich ecological resource background and a good ecological environment foundation.In recent years,it has faced the dual pressure of economic development and ecological protection.Based on the above understanding,the thesis takes the ecological space of Chaohu City as the research object,analyzes the relevant background and combs the relevant theories and research progress,and starts the research with the idea of "combining the status quo-pattern recognition-analysis and evaluation-comprehensive optimization".Firstly,it interprets the components and main characteristics of the ecological space,and clarifies the situation of Chaohu City from the aspects of location,economy,history and culture,natural resources,etc.,and analyzes the outstanding problems faced by the ecological space of Chaohu City from multiple perspectives.Secondly,complete the identification and construction of the ecological space pattern of Chaohu City.Mainly use geographic information technology methods to complete the identification of the three major ecological spatial pattern components of ecological non-point source,ecological node,and ecological corridor: based on remote sensing interpretation,identify the ecological farmland,ecological green land and ecological wetland according to the attributes of ecological space.The ecological nonpoint source space totals 1899.3km2;a total of 43 main ecological nodes are identified according to the node classification and extraction criteria;a total of 82 important ecological corridors are identified based on the most cumulative resistance model and the corridor repeatability.And analyze the comprehensive identification results,and build an ecological spatial pattern of "broad non-point sources,intertwined dots and corridors,and network distribution" in Chaohu City.The ecological spatial pattern of Chaohu City is evaluated again.The ecological spatial pattern of Chaohu City is evaluated from two perspectives of element level and comprehensive level in accordance with the "part-to-whole" approach: Based on the analytic hierarchy process,the ecological non-point source is evaluated from the perspective of ecological sensitivity,and the overall foundation is good,The spatial distribution is uneven,the “blue-green space” is the main feature,and the farmland space is the supplementary ecological non-point source characteristics;the ecological nodes are evaluated based on the complex network theory and the entropy weight method,and it is concluded that important nodes are concentrated in the middle,and their importance is reduced in layers,The distribution of nodes is uneven,and the characteristics of ecological nodes are missing in some areas;the ecological corridors are evaluated based on the network connectivity and gravity model,and the ecological network is basically stable,the corridor connections are relatively smooth,and the important corridors run through the north and south.The characteristics of ecological corridors distributed along the edges of the corridors.Based on the evaluation results of the above elements,the overall spatial pattern of “one ring and two belts connecting four districts,one core and nine points with multiple corridors” is obtained,and the ecological space of Chaohu City has partial non-point source spatial fragmentation and the initial characteristics of matrix fragmentation.At present,the distribution of important nodes is uneven,the organic model has not yet formed,the degree of corridor connection is average,and the ecological circulation effect is not good.Finally,the optimization measures and management and control strategies of the ecological space pattern of Chaohu City are proposed.Based on the evaluation results of the ecological spatial pattern of Chaohu City and the existing problems,the principles and goals of optimization and management are proposed;from the implementation of classification optimization to ecological non-point source optimization,from balanced node distribution to ecological node optimization,and from strengthening corridor circulation to ecological corridor optimization;From the perspective of management and control needs,it proposes to carry out the evaluation of the ecological space pattern,establish a hierarchical and classified control mechanism,improve the management and control of the ecological space,strengthen the protection of related planning and legislation,the combination of rigid control and flexible control,and the combination of total control and classification control Ecological space management and control strategy.Figure[69] Table[33] Reference[86]... |
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