A Evolution Study Of Accessibility Of Land Transport And Urban Economic Linkages Of Counties In Qinghai Province

Accessibility using the weighted average travel time method and Kriging interpolation method to the Qinghai province highway and Qinghai Tibet line-Lanqing made a detailed analysis of the research.Using the gravity model,XY to line analysis and Kriging interpolation method to do analysis on Qinghai province contact strength county economy economic ties with the total.By curve fitting and GIS superposition analysis on the relation between accessibility and economic ties were studied.The results show that the Qinghai province county accessibility level shows in the provincial capital of Xining to other parts of the province are decreasing trend,such as reachability line presents a semi annular irregular distribution.Every 30 years the county accessibility levels were increased,showing the main road direction.Xining has been up to the level at the highest level,and the Xining city's location,traffic conditions,the city's economic and other towns about time distance etc.The most prominent County of Qinghai Province,the economic contact intensity is the performance of Xining and Huangzhong,Datong,Ping and other links,Xining of Huangzhong and Datong to the leading role of strong foreign exchanges.Most areas for the sixth economic contact intensity axis,the overall performance of northeast economic contact intensity is better than the West and south.The total amount of contact on the whole county economy showed a growth trend,and the economic development of each county level,road traffic improvement,the improvement of the level of city and other reasons.Qinghai province is the typical structure of "single core" space of the city,as the capital of Xining,with population,economy,transportation,urbanization level is a huge advantage,the province's economic growth,huge radiation.The edge of the West and south of the county has been in total economic basic weak trend.The total economic is on the northeast,northwest and southern only very weak features,two differentiation phenomenon is more obvious.By curve fitting can explain the level of accessibility of foreign influence on the total amount of contact is more and more big,the overlay analysis indicates that the overall level of accessibility and the strength of economic ties and external relations volume showed a positive correlation.The systematic cluster analysis divides the Urban Accessibility of Qinghai and the external economy into 8 types of combination in space,which are roughly the two types of "coordination" and "advanced type".The "coordination type" has formed a benign interaction between the level of economic development and the level of traffic development.The two are mutual promotion and mutual influence,and the level of "advance" for traffic construction and development exceeds the level of economic development.