Located in the northwest of China,the Lanzhou-Xinjiang high-speed railway is the only railway line that connects the western part of Gansu Province and Xinjiang,China.In this paper,the research scope is taking one-hour driving distance (60 km) in the provincial highway as the radiation range of high-speed rail,and thus 91 counties and autonomous prefectures are extracted.Based on the accessibility of the grid,the basic road network and socio-economic statistics of the three provinces including Gansu,Qinghai and Xinjiang in 2015 are adopted.Also,the methods and models of weighted average travel time,isochronous circle,economic potential and spatial variogram are used to evaluate comprehensively the temporal and spatial convergence effects and economic potential changes of the weighted travel time within the research unit before and after the Lanzhou-Xinjiang high-speed railway is opened.All done is expected to better serves the regional development and provide theoretical support scientifically for regional coordinated development.The results show that the opening and operation of the Lanzhou-Xinjiang high-speed railway can do a great job.Firstly,the weighted average travel time of 91 county units along the line shortened by 33.46%,which increases from the core area of the high-speed railway to the periphery in turn,showing a “core-edge” structure.Compared with core cities,the role of accessibility and optimization in small and medium-sized counties are relatively stronger.Secondly,the accessibility of the high-speed rail station cities and other central cities has risen significantly,in which there are obvious “node effect” and “corridor effect”.The opening and operation of Lanzhou-Xinjiang high-speed railway has reduced the regional accessibility difference as a whole,while the high-speed rail stations and their adjacent areas gain the largest accessibility benefits.And the spatiotemporal convergence is in line with the law of the geographical distance attenuation to a certain extent.Finally,the regional economic potential as a whole has developed in a balanced way,stimulating the economic development of cities and towns along the line.At the same time,the evolution of economic potential has become more and more prominent in its hierarchical feature.Above all,measuring the impact of traffic improvements on regional development and socio-economic effects under different scenarios,speeds and conditions would have a positive guidance for future research on regional economic development along high-speed railway,national traffic planning and its strategic layout．
XIAO Rui, BAI Yong-ping, CHE Lei, WEI Xian-hua, ZHANG Wen-xian
.
Effect of time-space convergence and economic
potential characteristics of county accessibility along the Lanzhou-Xinjiang
high-speed railway[J]. Arid Land Geography, 2020
, 43(3)
: 831
-838
.
DOI: 10.12118/j.issn.1000-6060.2020.03.29
［1］JIN Fengjun，JIAO Jingjuan，QI Yuanjing．Evolution and geographic effects of high-speed rail in East Asia［J］．Acta Geographica Sinica，2017，27（5）：515-532．
［2］GUTIERREZ J．The European high-speed train network:Predicted effects on accessibility patterns［J］．Journal of Transport Geography，1996，4（4）：227-238．
［3］LEVINSON D M．Accessibility impacts of high-speed rail［J］.Journal of Transport Geography，2012，22（2）：288-291．
［4］KIM H，SULTANA S．The impacts of high-speed rail extensions on accessibility and spatial equity changes in South Korea from 2004 to 2018［J］．Journal of Transport Geography，2015，45（45）：48-61．
［5］蒋海兵，祁毅，李传武．中国城市高速铁路客运的空间联系格局［J］．经济地理，2018，38（7）：26-33．［JIANG Haibin，QI Yi，LI Chuanwu．China’s city high-speed rail (HSR) passenger spatial linkage pattern and its influence factors［J］．Economic Geography，2018，38（7）：26-33．］
［6］白永平，张秋亮，黄永斌，等．兰新铁路沿线经济带区域经济差异变动的空间分析［J］．干旱区地理，2013，36（1）：147-155．［BAI Yongping，ZHANG Qiuliang，HUANG Yongbin，et al．Spatial analysis of evolvement of regional economic disparities in the economic belt along LanXin Railway［J］．Arid Land Geography,2013，36（1）：147-155．］
［7］李涛，马卫，高兴川，等．基于Super-DEA模型的厦深高铁可达性效应综合评估与空间分异［J］．经济地理，2017，37（8）：67-76．［LI Tao，MA Wei，GAO Xingchuan，et al．Evaluating the impacts of the Xiamen-Shenzhen high-speed railways on accessibility and its differentiation:A super-DEA approach［J］．Economic Geography，2017，37（8）：67-76．］
［8］梅琳，黄柏石，敖荣军，等．长江中游城市群高速铁路可达性格局及演变［J］．经济地理，2018，38（6）：62-68．［MEI Lin，HUANG Boshi，AO Rongjun， et al．The spatial pattern and evolution of high-speed railways accessibility of the urban agglomeration in the middle reaches of the Yangtze River［J］．Economic Geography，2018，38（6）：62-68．］
［9］张文尝．工业波沿交通经济带扩散模式研究［J］．地理科学进展，2000，19（4）：335-342．［ZHANG Wenchang．A study on the pattern of industrial wave expanding along traffic economic belts［J］．Progress in Geography，2000，19（4）：335-342．］
［10］王璐，黄晓燕，曹小曙，等．贫困山区不同层级可达性及其经济效应——以秦巴山区为例［J］．经济地理，2016，36（1）：156-164．［WANG Lu，HUANG Xiaoyan，CAO Xiaoshu， et al．The accessibility of different scales and its impacts on economy development in poverty-stricken mountainous areas:A case study in Qinba Mountain areas［J］．Economic Geography，2016，36（1）：156-164．］
［11］蒋海兵，徐建刚，祁毅．京沪高铁对区域中心城市陆路可达性影响［J］．地理学报，2010，65（10）：1287-1298．［JIANG Haibin，XU Jiangang，QI Yi．The influence of BeijingShanghai high-speed railways on land accessibility of regional center cities［J］．Acta Geographica Sinica，2010，65（10）：1287-1298．］
［12］马颖忆，陆玉麒，柯文前，等．泛亚高铁建设对中国西南边疆地区与中南半岛空间联系的影响［J］．地理研究，2015，34（5）：825-837．［MA Yingyi，LU Yuqi，KE Wenqian， et al．The influence of Pan-Asia high-speed railway construction on spatial relation between Southwest China’s frontier area and Indo-China Peninsula［J］．Geographical Research，2015，34（5）：825-837．］
［13］杨晓敏，李玲琴，付建新，等．30 a青海省公路可达性及县域经济联系格局演化［J］．干旱区地理，2018，41（6）：1376-1387．［YANG Xiaomin，LI Lingqin，FU Jianxin，et al．Pattern variation of accessibility and economic linkage at county scale in Qinghai Province from 1986 to 2016［J］．Arid Land Geography,2018，41（6）：1376-1387．］
［14］张建伟，窦攀烽，张永凯，等．江苏省县域创新产出的空间计量经济分析［J］．干旱区地理，2017，40（1）：222-229．［ZHANG Jianwei，DOU Panfeng，ZHANG Yongkai， et al．Spatial econometric analysis of innovation output of Jiangsu Province in terms of county scale［J］．Arid Land Geography,2017，40（1）：222-229．］
［15］尹鹏,李诚固．环渤海“C型”经济区经济格局的空间演变研究［J］．地理科学，2015，35（5）：537-543．［YIN Peng，LI Chenggu．Spatial evolution of economic pattern in“Ctyped”economic region along the Bohai Rim［J］．Scientia Geographica Sinica，2015，35（5）：537-543．］
