| Because of the reasons of economy,geography and history,Gansu Province has been in the underdeveloped provinces,and its traffic development and economic development behind the eastern developed provinces seriously.As an important node province of "South Channel" and "One Belt And One Road",Gansu Province has welcomed new opportunities and development under the new environment.At present,there are some problems in Gansu Province,such as insufficient density of road network construction,imperfect road network planning and unbalanced regional economic development.Therefore,taking 14 cities in gansu province(state)as the research unit,this paper studies the dynamic evolution law of highway,railway,comprehensive transportation network development and regional economy in 2007,2012 and 2019,as well as the coupling relationship between population,economy and road network development in Gansu Province from the time axis and traffic mode axis,for reasonable planning of regional transportation network,identify bottlenecks,improve the road network development and the economic development in gansu province regional economic adaptability of plays an important role.This paper mainly studies the following issues:(1)Dynamic analysis of road network accessibilitySelection in 2007,2012,and 2019,the data sets of highway,railway,and comprehensive road network in Gansu Province were established according to the basic data obtained.Based on the weighted average travel time and GIS spatial analysis method,this paper calculates the accessibility of highway,railway and integrated network in Gansu Province and visualizes its spatial pattern,analyzes the structural change law of land transportation network and summarizes the layout characteristics and evolution direction of land transportation network under different transportation modes.The results show that the accessibility degree of underland transportation is increasing with different modes of transportation in each city,and the change of accessibility value presents the directivity of the main road,especially the expressway and high-speed railway.The accessibility degree gradually decreases from Longzhong to northwest and southeast.Dingxi,Baiyin,Wuwei and Linxia,which are close to Lanzhou,have lower accessibility values,while Jiayuguan,Jiuquan and Qingyang have higher accessibility values.(2)Dynamic analysis of economic links and total links among citiesAccording to the time distance matrix of highway,railway,comprehensive road network and socio-economic data of Gansu Province,analyzes the characteristics of economic connection and total amount between States and cities,and summarizes the change law through the evolution characteristics of three time sections in 2007,2012 and 2019.Combined with GIS technology and improved gravity model,economic ties in gansu province spatial pattern and the calculation results of the total economic ties to visualize,respectively summarized road network,rail network and comprehensive development direction under the network economy.The research shows that the strength of economic connection among cities shows a steady growth trend,and the economic connection is gradually networked.(3)Dynamic analysis of economic subordination degree of cities and prefecturesOn the basis of the economic connection between the States and cities,the paper analyzes the economic membership degree of the States and cities under the highway,railway and comprehensive road network of the three time sections in 2007,2012 and 2019.The results show that: the economy of Gansu Province has gradually formed a multi-core economic pattern of Lanzhou Baiyin group,Jiuquan jiayuguanjia group and Pingliang Qingyang group.The urban economic ties within each group are close and increasing,but the economic ties between groups are strengthened,but the overall strength is weak.(4)Analysis on coupling coordination between accessibility and total urban linkages under different transportation modes in Gansu ProvinceCoupled coordination analysis was conducted on the accessibility of road,railway and comprehensive network and the total amount of urban economic connection in three time section node cities in 2007,2012 and 2019,the coordination and adaptability of highway,railway and comprehensive road network construction level and economic development in each city and city were studied respectively.The research shows that the accessibility and the total amount of economic connection in Gansu Province are in the middle and low coupling coordination stage,the development of accessibility lags behind,the traffic conditions fail to play a good driving role in the regional economic connection and regional economic development,and the trend of coupling coordination degree rising is not obvious. |
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