Research On The Pattern And Evolution Law Of Population Spatial Distribution In Xuzhou

As one of the most active factors in urban development,population is an important part of urban space.The distribution and evolution of urban population has a direct impact on the change of the structure and layout of the economic,social and industrial elements.The most important task of urban and regional research is to analyze the spatial structure of the cities and regions,and the distribution characteristics of population density is the key point.The urban population density model can not only reveal the internal structure of the city,but also provide confirmation for the city's economic model.Therefore,it is of a great significance to reveal the changes of urban and regional structure that analyzing the variation of population density model with time.This paper takes Xuzhou city as the research object,based on the statistical yearbook of 2001-2016 in Xuzhou,on the streets and towns as the smallest research unit,using GIS technology and Quantitative Geography method,to analyze the evolution characteristics of spatial distribution of population in Xuzhou,This paper systematically analyzes the current situation of population distribution in Xuzhou,reveals the spatial pattern of population distribution in the counties of Xuzhou,specifically,the spatial distribution of population in Xuzhou has the characteristics of circle pattern and axis extension,that is,the high value center of the spatial distribution of population density of all the countries in Xuzhou are is surrounded by the government of the cities and counties,is descending successively in the form of circle and layer.Then this paper uses the index of population gravity center,population concentration and unbalanced index to analyze the population spatial distribution and evolution in Xuzhou city over the years,and by using spatial autocorrelation analysis found that among the city township has a strong spatial autocorrelation.Secondly,this paper choose the linear function,logarithmic function,Clark function,Smeed function,Newling function method and based on the buffer of Geographic Information System,respectively fitting the population density distribution model of the domain and the urban area of Xuzhou City.It is found that the best fitting model was Smeed model.It analyze the population distribution in Xuzhou city,with comparing with the population density model of big cities such as Beijing,Shanghai,Guangzhou and so on.This paper deeply explored the evolution of the spatial distribution of population in Xuzhou by means of qualitative and quantitative analysis.It provides a decision basis for layouting population properly and promoting the sustainable development of population and economy,it is helpful to carry out urban planning scientifically and rationally.At the same time,it will provide reference for the development of cities of the same type.