Analysis Of Spatial Structure Evolution And Influencing Factors Of Central Plains Urban Agglomeration Based On VIIRS Night Lighting Data

Urban agglomeration is the key to national economy and global social economy.It is directly related to the flow of a large number of production factors,and is also the core of national and global economy,technology,culture and transportation.The formation and development of urban agglomeration has promoted economic development and the flow of production factors.China is also gradually carrying out the construction and planning of urban agglomeration on the basis of the great success of foreign urban agglomeration.The new model of taking urban agglomeration as the leading factor and leading regional coordinated development has accelerated the pace of national regional strategic integration.However,in the process of urban agglomeration development,there will be various problems,such as the development status,resource allocation efficiency and green development.The Central Plains urban agglomeration is not only located in the center of China,but also the development of the Central Plains urban agglomeration is directly related to the efficiency of the linkage development between the east and the west.At the same time,the Central Plains urban agglomeration is the center of gravity and the connecting point of the north-south transportation.Most of the domestic researches on the spatial structure of developed urban agglomerations are carried out,while the researches on the evolution of the spatial structure of urban agglomerations in the central and western regions are less.The study of the Central Plains urban agglomeration plays a comparative and reference role for many developing urban agglomerations in China.Based on the above background,this paper adopts the interdisciplinary approach and combines relevant theories to study the Central Plains urban agglomeration.The main contents include: First,analyze the spatial structure change of the Central Plains urban agglomeration according to the light intensity level;Secondly,the change process of spatial structure is analyzed from another perspective through the change of centroid movement track,and further infers what changes will be made in the future in the space of the Central Plains urban agglomeration;Thirdly,through the change of connection intensity,we can reveal the change of spatial connection among the prefecture-level cities in the Central Plains urban agglomeration;Fourth,the total value of light brightness reflects the economic development,and the economic development is the direct reflection of the changes in the spatial structure.The analysis of the factors affecting the total value of light brightness of the Central Plains urban agglomeration is a necessary step to optimize the spatial structure.The specific research conclusions are as follows: First,in 2012,the Central Plains urban agglomeration was a single-core structure with Zhengzhou as the core;In2015,a dual-core structure centered around Zhengzhou and Luoyang was formed;The spatial structure of "one core and four axes" will be formed in 2018.Second,the development of the Central Plains urban agglomeration is not balanced,and the centroid mainly shifts to the northeast,with a large range moving to the east.In the future,the centroid of the Central Plains urban agglomeration will continue to move eastward from east to west.Third,in general,the spatial links between cities in the Central Plains urban agglomeration are becoming stronger and stronger,and the mutual influence between cities is becoming greater and greater,and the total amount of spatial links has increased significantly.Fourth,government intervention,financial development and education level are significant factors influencing the total brightness of the Central Plains urban agglomeration.The industrial structure has a certain impact on the total brightness of the Central Plains urban agglomeration.This paper takes the built-up areas of prefecture-level cities in the Central Plains Urban Agglomeration as the research area,and analyzes the evolution process of the spatial structure of the Central Plains Urban Agglomeration,the change of spatial links between cities and the internal factors of the city based on the night light data.It can not only see whether the construction of the "one core,four axes and four areas" network spatial pattern is successful,but also provide improvement suggestions for further spatial structure optimization.