Analysis And Optimization Of Urban System Structure Of Zhengzhou Metropolitan Area Based On Towns Above Township

The metropolitan area is the urban spatial organization form that arises from the development of urbanization to a higher stage.It is the core component of the urban agglomeration and the core growth pole that leads the development of the urban agglomeration.It is the main space carrier for integrating into the global urban system network and participating in global city competition.Strengthening the optimization of the urban and rural system structure within the metropolitan area not only promotes the efficient combination of internal structures,but also enhances the radiation driving power of the core cities,and further enhances the connection between the urban areas and the external space,and at the same time promotes the coordinated development of regional synergies.This study is based on the relevant theories of urban system optimization,such as central theory,metropolitan area theory,urban interaction theory,urban-regional system theory,urban and rural regional system theory,etc.,using urban architecture analysis methods,such as the city’s first degree Law,order-scale method,urban central intensity,fractal theory model,nuclear density,spatial auto-correlation analysis,economic linkage strength model and economic membership model,etc.,to support the Central Plains economic zone,the core area of ?the development of the Central Plains urban agglomeration——The in-depth analysis of the scale structure,hierarchical structure,functional structure,spatial structure and network structure of the urban system in Zhengzhou metropolitan area,and then proposes the future urban architecture optimization plan according to its current characteristics and problems.Firstly,the scale structure of the urban system.Using the first degree,the pyramid model,the Zipf index,the order-scale rule,etc.,quantitative analysis of the population,economy and land scale structure characteristics of the metropolitan area,and found the following characteristics:(1)The difference in the number of layers varies greatly,and the spatial distribution characteristics are obvious;(2)The high-level cities are prominently developed,and the characteristics of the first city are obvious;(3)The population size Zipf index is too large,and the overall conforms to the order-scale structure;(4)The population size of large and medium-sized people is small,and the number of small towns and towns is large;(5)Towns present a more reasonable "olive-type" pyramid structure,and townships present the currentstatus of irregular "convex-shaped" pyramid structures;(6)High-level cities are prominently developed,and the core advantages are obvious;(7)The number of small and medium-sized towns and towns is huge,and the spatial differentiation characteristics are obvious;(8)The area of the built-up area increased,showing an "S"-shaped curve growth;(9)The scale of land has been expanded,and the concentration of townships has increased.Combining the quantitative analysis results and actual development of the above scale structure,and taking into account the planning and strategy for future development,the following optimization and adjustment measures are proposed:(1)Highlight the core advantages of the first city and optimize the number of cities at each level;(2)Solve the population scale fault and construct a complete sequence structure;(3)Moderately expand the scale of township population and optimize the scale structure of township population;(4)narrow the gap between the various levels and optimize the economic scale structure;(5)reduce the number of small and medium towns and towns,increase the number of large towns;(6)highlight the core advantages of the first city and enhance its radiation-driven ability;(7)Reasonably expand the scale of the land and optimize the scale structure of the land.Secondly,the hierarchical structure of the urban system.Using the urban central intensity and the centrality of the township to measure the urban hierarchical structure and urban-rural hierarchical structure of the metropolitan area,the following characteristics are found:(1)The central intensity of the town is significantly different,and the role of comprehensive strength of the town is large;(2)The number of high-grade towns is small,and the number of low-level towns is large;(3)The centrality intensity of each township is large,and the effect of township comprehensive strength is significant;(4)The number of townships and towns in each grade is large,and the hierarchical structure is not reasonable.Based on the above quantitative analysis results,combined with the development potential of towns and towns,the following optimization strategies are proposed:(1)increase the number of high-grade towns and reduce the number of low-grade towns;(2)Enhance the strength of each level of the city,and build a reasonable hierarchical structure;(3)Enhance the comprehensive strength of each township and town,and narrow the gap between towns and towns of all levels;(4)Optimize and adjust the number of townships at all levels,andbuild a reasonable township hierarchy.Thirdly,the functional structure of the urban system.Through the analysis of the functional characteristics and functional orientation of the towns in the metropolitan area,it is found that the following characteristics exist:(1)The industrial structure of the three times is not reasonable,and the industrial structure needs to be optimized;(2)The industrial structure is unevenly distributed,and the industrial differences in various regions are large;(3)The urban function types are similar,and the functional complementarity needs to be strengthened;(4)The positioning of urban functions is not clear,and the modern functional system needs to be improved.Combining the above characteristics,taking into account future development plans and strategies,the following optimization measures are proposed:(1)Enrich the functional types of each town and build functional complementary functional structures;(2)Identify the functions of each town and build a modern urban function system.Fourthly,the spatial structure of the urban system.Using nuclear density,spatial auto-correlation,fractal theory model and other analytical methods,combined with relevant planning to analyze the spatial structure characteristics of metropolitan areas,found the following problems:(1)The core area has strong comprehensive strength,and the comprehensive strength of the non-core area needs to be strengthened;(2)The spatial association type is positive correlation,and the significant correlation characteristics of the town area are obvious;(3)The linkage between the towns and the shafts is weak,and the regional links need to be strengthened;(4)The city’s functions are relatively macroscopic,and the functions of each town need to be further refined.Based on the above qualitative and quantitative analysis results,combined with the actual development situation and related planning strategies,the following optimization schemes are proposed:(1)Optimize the nuclear-enhanced secondary center and construct a "one core,four-core,multi-point" spatial structure;(2)Enhance the relationship between the shafts and build a "five-axis and one belt" spatial pattern;(3)Refine the functions of various towns and build a "five-zone" spatial pattern with complementary functions,thus forming a networked,group-type,and intensive regional spatial structure of "one core,four hearts,five axes,three belts and five zones".Fifthly,the network structure of the urban system.Using the economic connection strength and economic membership model to analyze the quantitative characteristics of the metropolitan area networkand the network structure characteristics,the following problems are found:(1)The number of high-level connections is small,and the connection strength needs to be improved;(2)The number of high-level node cities is small,and the urban economic location needs to be improved;(3)"*type" network structure features are obvious,"growth △ type" network structure needs to be improved.Combining the above networkstructure characteristics and future development trends,the following optimization schemes are proposed:(1)Improve the transportation network and promote the network development of metropolitan areas;(2)Optimize the network hierarchy and promote the formation of a multi-center network;(3)Build a multi-center network structure and promote the network development of metropolitan areas.