Research On The Space Economic Ties Among Administrative Cities In Gansu Province Based On Traffic Accessibility

Through the study on the traffic accessibility,space economic ties and the main ties among 14 administrative cities of Gansu province,this paper aims to improve these less developed areas to strengthen economic ties and promoting its economic development,especially under the policy background of the inland of China opening-up,new urbanization and “B&R”.It is worth to study the city economic trends and development of the less developed areas.Taking 14 administrative cities of gansu province as the research unit,This paper measuring highway and rail transportation in2006,2011 and 2016,on the basis of accessibility of introducing modified gravity model,the economic ties between the two cities strength and direction.This paper uses GIS network analysis and exploratory spatial data analysis method.The conclusions are as follows.During the study period,the accessibility of different modes of transportation in gansu province was greatly improved with time,and the railway accessibility was better than that of highway.The road accessibility and the railway accessibility are unbalanced.The change of the global moran index shows that the spatial agglomeration of highway accessibility is weakened,and the spatial agglomeration of railway accessibility is weakened first.Correspondingly,the economic connection intensity of different modes of transportation is in sync with its accessibility level,and the economic link intensity of the railway is better than that of the highway economy.The distribution of economic contact strength of highway and railway is unbalanced.The economic connection strength of different transportation modes presents spatial correlation and agglomeration.The global moran index of highway and railway economic link intensity is decreasing.From the point of local spatial autocorrelation,moran index is positive,based on the economic road and rail contact strength is high and low concentration,indicating the spatial autocorrelation,on the whole road,is superior to the railway.The highway LISA figure reflects the research area of lanzhou,baiyin,dingxi city and linxia autonomous prefecture as the high concentration,while only baiyin is high concentrated area in 2011,lanzhou,baiyin are high concentration areas in 2016,which shows lanzhou,baiyin have higher economic ties with surrounding city.There is very big difference between the railway LISA figure reflects the city cluster on the basis of railway and highway have,zhangye is low to high concentration in 2006,pingliang as the low concentration.all the cities to be significant in 2011 and 2016.The research period is based on the main economic links of road and railway in lanzhou.Lanzhou's main economic contact has been dingxi city,baiyin city and linxia autonomous prefecture.The main economic connection of wuwei city in hexi corridor is lanzhou city,the main economic contact direction of jinchang city is wuwei city,and the economic membership is about 55%.The main economic connection of zhangye city and jiayuguan is jiuquan,of which the economic membership of jiayuguan and jiuquan is about 85%.Pingliang city and qingyang city of longdong area are the main economic links of each other,and the main economic contact direction is not formed in longnan region.Longnan city is closely related to tianshui city,and gannan autonomous prefecture is closely related to linxia autonomous prefecture.Gansu province urban economic contact pattern appears as Lanbai economic zone,Jiujia economic zone,Pingqing economic zone are the cores.based on the highway and railway economic ties on the space form in lanzhou,jiuquan radiated outward as the core of global connections and local contact with the combination of multi-core network structure.The inner connection between the blue and white group,the jiujia group and the pingqing group was strengthened,and the connection between the groups was relatively weak.Although the spatial pattern of urban economic connection based on highway and railway is consistent,the network radiation circle of railway economy is weaker than highway.The two different modes of transportation economic contact Lanbai first degree prominent,has the whole domain radiation and the influence characteristic,the hinterland attack capture effect is remarkable.In general,the leading direction of urban economic ties based on different modes of transportation are lanzhou and jiuquan.