Research On Evolution Rule Of Urban Spatial Morphology Based On Multi-scale

Urban spatial form is one of the most important forms of urban spatial evolution.The evolution of urban spatial morphology has different influence on the spatial distribution,spatial expansion and external morphological evolution of urban function on different spatial scales.Therefore,it is of great significance to study the evolution of urban spatial morphology.Taking Zhengzhou as the research object,this paper takes the multi temporal remote sensing image,the urban land planning map and the Zhengzhou statistical yearbook as the basic data.By using the spatial analysis,mathematical statistics and a variety of quantitative analysis methods,two scales of urban functional land and urban overall shape evolution are selected to determine the urban spatial form.And quantitative research,analyzing the laws,characteristics and mechanisms of the evolution of urban spatial morphology in Zhengzhou.In the qualitative research,the spatial differentiation and the circle structure of urban space functional land are studied,and the spatial pattern and evolution law of the main functional land use in Zhengzhou are summarized.In the quantitative study,through the calculation of the urban spatial structure related index,the outer space expansion and the external structure evolution of Zhengzhou city are discussed,and the model and characteristics of urban expansion are summarized.Finally,combined with urban statistical data,the influencing factors and mechanism of urban spatial evolution are discussed.The results of the study show that:(1)In the process of Zhengzhou's urban expansion,the spatial structure and external structure of urban functional land change fiercely,and the city's core is moving eastward.Among them,industrial land and storage land are gradually concentrated to the outer edge of the city,and tend to be distributed in a balanced way.The commercial land is gradually concentrated in the central area of the city.The municipal facilities and residential land are gradually distributed in a relatively uniform distribution except for the University City and the high and new area.In the whole,the city of Zhengzhou is two.Seven square is the center,and the expansion velocity of the southeast direction is relatively fast.The Longhai Railway and the inner side of the Beijing and Guangzhou railway are affected by the traffic factors,and the expansion speed is relatively slow,but the urban expansion has a certain roundness in general.(2)In the process of urban expansion,Zhengzhou's urban center of mass is moving eastward.During the whole period of the study,1995-2000 years,urban expansion and internal filling have developed simultaneously,and the two are relatively balanced;in the 2000-2005 year,the main cities are mainly external expansion;in the 2005-2016 years,the cities are mainly outward expansion,and the internal filling is supplemented.(3)In addition to the main driving force of the number of university students,the total investment in real estate,the total sales of urban population and commercial housing,the reasons for the formation of the above-mentioned law of expansion are also influenced by the factors such as natural,traffic,economy,population and government regulation and control in Zhengzhou.