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Arid Land Geography ›› 2021, Vol. 44 ›› Issue (1): 268-276.doi: 10.12118/j.issn.1000–6060.2021.01.28

• Regional Development • Previous Articles     Next Articles

Spatial features of road networks in Ningxia based on GIS

GAO Yuxiang1(),DONG Xiaofeng2(),LIANG Ying2   

  1. 1. College of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
    2. College of Architecture and Design, Beijing Jiaotong University, Beijing 100044, China
  • Received:2020-03-10 Revised:2020-06-05 Online:2021-01-25 Published:2021-03-09
  • Contact: Xiaofeng DONG E-mail:19115056@bjtu.edu.cn;xfdong@bjtu.edu.cn

Abstract:

Ningxia Hui Autonomous Region is an important transportation node connecting northern and northwestern China, where a purpose-built road network can accelerate regional development. The accessibility of counties in 2011, 2017, and 2023 (projected) was calculated based on the road network of Ningxia, by using an improved network analysis method, cost distance algorithm, and ArcGIS spatial analysis. The road network in the whole region was analyzed for the spatial distribution of accessibility characteristics, and suggestions for future road construction are put forward. The results are as follows: (1) The road network in Ningxia forms a cross, which is generally characterized as strong in the north and weak in the south, because the layout is unbalanced. The spatial structure of the road network in Ningxia is affected by both economic and natural factors. (2) Access time between northern counties is shorter than that of southern counties. The road network in the south is the key area for road construction in the future. (3) A traditional network analysis method is optimized using the consideration of transfer time, by setting impedance, which makes the accessibility calculation more scientific and reasonable. (4) The average accessibility of counties was reduced from 4.02 h in 2011 to 3.75 h in 2017 and is expected to be 2.72 h in 2023. The accessibility of the road network in the whole region is constantly improving. There are differences in the range of improvement, and the accessibility of southern nodes is obviously improved. (5) Compared with 2011, the accessibility difference between counties is decreasing, so the balance in the spatial pattern of road networks in the whole region is gradually increasing. (6) Ningxia should shift its attention to build both inner and outer transportation channels centered on Yinchuan, and road construction in the south should be accelerated to optimize the road network layout of the whole region.

Key words: road network, spatial feature, GIS, improved network analysis, Ningxia