Spatial-Temporal Evolution Of Build-up Areas In Taiyuan City And Yuci District Based On The Urban Integration

With the rapid development of China's economy and the continuous advancement of urbanization,in order to meet the objective requirements of economic and social development,the scale of urban build-up areas must be expanded.The spatial-temporal evolution of urban build-up areas under the background of urban integration was of great significance to the formulation of scientific planning and the promotion of regional sustainable development.Taking remote sensing images as the main data source,this paper analyzed the expansion area of the urban build-up areas by extracting the information of build-up areas of Taiyuan city and Yuci district in three periods and analyzed the characteristics of spatial-temporal evolution of urban build-up areas in the study area.Then,Combined with the relevant statistical data,We used the gray relational degree model to figure out the main driving factors for the expansion of build-up areas in the study area.we used the entropy model to figure out the urban Integration development indexs synchronization level of Taiyuan city and Yuci district during 2006 to 2016.The result indicates:1)the urban build-up areas in the study area are expanding continuously.the urban build-up areas in Taiyuan city,the gravity center of urban build-up area first shifts to the northwest,and then to the southeast direction,and in Yuci district,the gravity center of urban build-up areas shift to the northwest direction.2)The expansion of build-up areas in the study area are mainly affected by five factors:the level of urbanization,the level of economic development,industrial structure,policy factor and traffic factor,but the role of these factors are different to the driving force of the build-up areas expansion.3)The urban integration development indexs level evaluation system was selected based on the four levels of the economic index of urban integration,the market index of urban integration,the socialization index of urban integration and the ecological index of urban integration.The development level of comprehensive index of urban integration in Taiyuan city and Yuci district is increasing from 2006 to 2016,and the socialization index of urban integration has a greater impact on the urban integration in Taiyuan city and Yuci district,followed by the economic index of urban integration,the market index of urban integration,and the ecological index of urban integration.