Study On The Spatial Pattern And Network Structure Of Land Transportation In The Yellow River Basin

This paper analyzes the spatial distribution pattern and network structure of the land transportation connection in the Yellow River basin by using GIS spatial analysis and network analysis method based on the near field O-D connections.The results are as follows:(1)The node cities in the Yellow River basin can be divided into 4 grades,and the transportation connections between the node cities can be divided into 5 grades;The G-C series high-speed transport connections in the Yellow River basin presents the pattern of "big loose,small gathering",and the axis spoke structure is significant;The connections of railway transport in the basin presents a pattern of "East-West land bridge crossing,north-south multi-path connections";From the perspective of different types of railway trains,the G-C series high-speed railway transport connectionss present a pattern of "dense in the East,sparse in the west,hot in the South and cold in the north".The D series high-speed transport railway transport links and G-C series high-speed railway transport are complementary in space and distributed in an axial shape in Jiaodong Peninsula,Hubao,Shanxi Henan Shaanxi border and Hexi corridor.The D series high-speed railway transport widens the high-speed railway spatial scope of the basin;The spatial distribution of various types of common speed train transport links is relatively balanced,which constitutes the spatial background of railway transport links in the basin.(2)The relationship between highway and railway transport in the Yellow River Basin presents a positive spatial correlation.Highway transport links are mainly low-low agglomeration and high-high agglomeration.Qinghai and Gansu provinces form low value agglomeration areas of highway transport links,Zhengzhou and some surrounding cities form high value agglomeration areas of highway transport links;Railway transport links are mainly low-low agglomeration,Qinghai Province and Wuhai,Shizuishan,Yinchuan and other 5 cities form a low value agglomeration area of railway transport.Zhengzhou and its adjacent Kaifeng,Xuchang,Pingdingshan form a low value agglomeration area;By drawing the distance attenuation curve,it is found that the best operating mileage and the most suitable transportation distance of highway transport are 250 km and 450 km respectively,and the best operating mileage and the most suitable transportation distance of railway transport are 500 km and 1100 km respectively.(3)The results show that the traffic resistance of railway transport network in the Yellow River Basin is higher than that of highway transport network;the highway transport network presents a significant core edge structure,and the transport network is gathering to Zhengzhou City obviously,and the distribution of weighted out degree centrality and weighted in degree centrality is asymmetric;In the highway transport network,Xining and Xi’an have the highest centrality of betweenness and the strongest control ability to other cities,Xi’an,Zhengzhou have the highest closeness centrality and the best accessibility;Zhengzhou,Jinan,Xi’an,Weinan and Taiyuan are the core of the railway transport sub network.In the railway transport network,Xi’an and Zhengzhou have the highest betweenness centrality.Each node city in the railway transport network has low centrality and poor accessibility.(4)According to fast unfolding algorithm,the road and railway transport network can be divided into 5 and 6 communities,with modularity of 0.593 and 0.689,respectively;There are four kinds of regional effects in the connections network of highway and railway transport in the Yellow River Basin: Administrative Region effect,seizing effect,neighborhood effect and corridor effect;In addition,the spatial organization mode of each community in the connections of highway and railway transportation can be summarized as four types: low water average potential,single-core,double-core and multi-core.