| Urban agglomerations are the growth center of its region, researching on the agglomeration and dispersion of urban agglomerations will contribute to provide the decision on the development of the region.Based on "Lanzhou-Baiyin Economic Zone Development Plan" and ”Lan-Xi-Ge economic zone plan", from the angle of agglomeration and dispersion,this study selected Lan-Bai-Xi urban agglomeration as the research object to analyze agglomeration and diffusion characteristics of population and economic factors,and hope to serve the basis of construction and development to Lan-Bai-Xi urban agglomeration.This paper is divided into five chapters in total,the main content of every chapter is as follows:The first chapter is introduction. In this chapter, firstly explained the importance of urban agglomeration and dispersion research from the background and the significance of topic.Then elaborated the research about urban agglomeration and agglomeration and dispersion inside and outside of China in order to get some reference from the previous research.Lastly, introduced the research methods and contents of this article, at the same time,showed the technology roadmap of this study,.The second chapter is the general situation.of Lan-Bai-Xi urban agglomeration. In this chapter,firstly analyze the current situation of China’s existed 23 urban agglomeration and the urban agglomeration in western China.Then analyze Lan-Bai-Xi urban agglomeration present development situation from the geographical conditions and economic development situation.Lastly choose four different Chinese urban agglomerations of different area to compare with Lan-Bai-Xi urban agglomeration from the geographical background and development index.The third chapter is the characteristics of population agglomeration and dispersion in Lan-Bai-Xi urban agglomeration. First in this chapter, explained the statistical description of population, and then used the ESDA and regional density function to analysis characteristics of population distribution of the Lan-Bai-Xi urban agglomeration. Research results showed:(1) Lan-Bai-Xi urban agglomeration internal population moved to the center of the city;(2) Fastest growing city in the urban agglomeration is lanzhou, xining and linxia city,but as an important city in Lan-Bai-Xi urban agglomeration, baiyin city’s attraction of the population is not very big;(3) Lanzhou city, xining city and linxia city urban population growth rate is far beyond the population growth rate of the peripheral county, the three cities are the center of the highest population density in Lan-Bai-Xi urban agglomeration;(4) In the three high population centre cities, lanzhou and xining city’s population has the tendency of further agglomeration, but linxia city has the tendency of diffusion.The fourth chapter is the characteristics of economy agglomeration and dispersion in Lan-Bai-Xi urban agglomeration. First in this chapter, explained the statistical description of exonomic factor of Lan-Bai-Xi urban agglomeration,and then used the first degree, concentration of GDP index and ArcGis spatial analysis module to analyze the characteristics of the internal economic factor agglomeration and diffusion of regional cities and peripheral county, finally used evenness index and Moran’s I index of Lan-Bai-Xi urban agglomeration for the further research. Research results showed:(1)In Lan-Bai-Xi urban agglomeration, the GDP per capita had a larger difference between urban area and its peripheral county, presented that the distance longer the GDP per capita tend to be smaller;(2)In Lan-Bai-Xi urban agglomeration,xining and baiyin city had obviously increse,but lanzhou city slower increase;(3) The peripheral county had a tendency of economic growth, especially in lanzhou, xining and baiyin, peripheral county’s economic growed significantly;(4)Lan-Bai-Xi urban agglomeration is in a garthering stage on the whole, but there is a certain trend of diffusion in some areas. |
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