| China has entered the decisive stage of building a well-off society in an all-round way.It is an important period of economic transformation and upgrading,and accelerating socialist modernization.It is also he critical period of further development of urbanization.The national new urbanization plan(2014-2020 years)clearly pointed out that "urbanization is a powerful engine to maintain sustained and healthy economic development".As one of the most important development strategies of our country,urbanization level has become an important indicator for governments at all levels to focus on and assess.And how to build a reasonable development index system of urbanization and comprehensive evaluation of the level of urbanization in a region has always been the focus of the study of geography.Lanxi City Group is one of the city group of countries.It can accelerate the cultivation and development level of only the scientific measure of the town and help plan the pattern of urbanization city agglomeration.The development Lanxi City Group will integrate quickly into the “The Belt and Road”.On the basis of the level of urbanization related research results,and through the analysis of the connotation of urbanization,on the basis of constructing the index system of comprehensive level measure Lanxi City group,including 4 subsystems and 14 layer indexes of population,land space,economic level,social life.The weight is determined by entropy method,and the comprehensive development level of urbanization in the 3 periods of 2005,2010 and 2015 in Lanxi City Group is measured by the comprehensive measurement model of urbanization level.Based on the measurement results,the multi-dimensional analysis of the urbanization level of Lanxi City groups is carried out.The spatial correlation between the urbanization level of Lanxi urban agglomeration is analyzed by Arc GIS10.2 and Geo Da1.10 software.The characteristics and trends of the spatial pattern of urbanization level with time are analyzed from two aspects,the overall and the local level.Finally,from the point of view of the problem City identification and the main function zoning,the development of the urbanization level of the county of Lanxi City Group is optimized.The conclusions are as follows:(1)From the perspective of the comprehensive urbanization level situation and differences of Lanxi City group: the county urbanization level difference of Lanxi City group is obvious,the regional central city urbanization level is higher,the spatial distribution is not balanced,showing a positive correlation between the administrative level and urbanization development.From 2005 to 2015,the comprehensive level of urbanization gradually increased,the number of cities with low urbanization level decreased significantly,the number of cities with high water level and higher level increased and gradually stabilized.In 2015,the urbanization level of urban agglomeration has developed to a medium level,and the number of cities with grade change gradually showed a normal distribution.(2)From the perspective of spatial pattern evolution of urbanization level of Lanxi City group: the similar urbanization level of counties in space appear obvious agglomeration effect and more and more strong,with Lanzhou,Xining as the fulcrum to their respective provincial administrative areas within the scope of the axis or contiguous development,and then by Gansu and Qinghai development toward each other.The higher urbanization level of the city development speed is faster than the lower urbanization level of the city,near the central city area development level is faster than the periphery.The evolution trend of urbanization level of population,land space is similar to that of comprehensive urbanization level.Economic level and social life urbanization development is faster than comprehensive urbanization.(3)From the point of view of the urbanization development optimization of Lanxi City group: urbanization development level and the main function zoning generally adapt,but most of the urban urbanization development problems.It is the key to optimize the urbanization development pattern of Lanxi City group to divide the county functional areas and enhance the driving force of the central city to develop Lanxi urban belt. |
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