Due to the natural geographical location,economic and other reasons,the traffic of Qinghai Province,China is relatively backward,the highway has been located at a very important position in the transportation network of Qinghai Province in the long time.This paper takes 1986,1995,2004 and 2016 as the time section,obtains Qinghai Province highway traffic network data based on Arcgis spatial analysis module,and analyzes the accessibility and evolution of the 43 main points in the cities of Qinghai Province highway network using the weighted average travel time method,the spatial pattern of Kriging interpolation method.As a whole,the level of accessibility in the spatial distribution shows a decreasing trend from Xining City and Haidong City to other parts of the province,and the contour accessibility line presents a semi annular irregular distribution.The accessibility of Xining City and Haidong City is the best during the study period,especially it is the highest in Xining City.The main factors impacting the accessibility include the geographical location,traffic conditions,urban economic and so on.The accessibility interpolation shows the directivity of traffic trunk road.Accessibility dynamic evolution shows that the road network accessibility levels of the 43 nodes have been increased in Qinghai Province and the variation of accessibility represents concomitant characteristics of similarities and differences.The spatial distribution of the contour accessibility line variation ratio shows trunk road directivity, such as the national highway and the motorway.The similarity shows a declining trend from the northeast to the west and the south region of the province.But there were differences in the level of the accessibility in three research stages.During 1986-2016,the economic linkage intensity and economy linkage volume among the counties in Qinghai Province has shown a growing trend,especially the total volume of economy linkage grows faster and faster.The economic linkage intensity of the top five and the economy linkage volume of the top three mainly concentrate in Xining and Haidong City.It reflects the typical "single core" urban spatial structure of Qinghai Province,and the radiation and leading effect of the provincial administrative center is very obvious.There is a positive correlation between the accessibility and economic linkage intensity or volume in the region.
[1] HANSEN Walter G.How accessibility shapes land use[J].Journal of the American Institute of Planners,1959,25(2):73-76.
[2] 杨家文,周一星.通达性:概念,度量及应用[J].地理学与国土研究,1999,15(2):62-67.[YANG Jiawen,ZHOU Yixing.Accessibility:Concept,measurement and application[J].Geography and Territorial Research,1999,15(2):62-67.]
[3] 李平华,陆玉麒.可达性研究的回顾与展望[J].地理科学进展,2005,24(3):69-78.[LI Pinghua,LU Yuqi.Review and prospectation of accessibility research[J].Progress in Geography,2005,24(3):69-78.]
[4] GUTIERREZ J,URBANO P.Accessibility in the European union:The impact of the trans-European road network[J].Journal of Transport Geography,1996,4(1):15-25.
[5] 曹小曙,阎小培.经济发达地区交通网络演化对通达性空间格局的影响——以广东省东莞市为例[J].地理研究,2003.22(3):305-312.[CAO Xiaoshu,YAN Xiaopei.Landnetwork spatial structure developed areas:Dongguan City in Guangdong Province[J].Geographical Research,2003,22(3):305-312.]
[6] 徐旳,陆玉麒.高等级公路网建设对区域可达性的影响:以江苏省为例[J].经济地理,2004.24(6):830-833.[XU Di,LU Yuqi.Impacts of the trunk highway system on a accessibility of the municipalities in Jiangsu Provice[J].Economic Geography,2004,24(6):830-833.]
[7] 曹小曙,薛德升,阎小培.中国干线公路网络联结的城市通达性[J].地理学报,2005,60(6):903-910.[CAO Xiaoshu,XUE Desheng,YAN Xiaopei.A study on the urban accessibility of national trunk highway system in China[J].Acta Geographica Sinica,2005,60(6):903-910.]
[8] 吴威,曹有挥,曹卫东,等.长江三角洲公路网络的可达性空间格局及其演变[J].地理学报,2006,61(10):1065-1074.[WU Wei,CAO Youhui,CAO Weidong,et al.Spatial structure and evolution of highway accessibility in the Yangtze River Delta[J].Acta Geographica Sinica,2006,61(10):1065-1074.]
[9] 吴威,曹有挥,曹卫东,等.区域高速公路网络构建对可达性空间格局的影响——以安徽沿江地区为实证[J].长江流域资源与环境,2007,16(6):726-731.[WU Wei,CAO Youhui,CAO Weidong,et al.Impact of regional expressway network on the accessibility pattern:The case of the belt along the Yangtze River in Anhui Provice[J].Resources and Environment in The Yang TZe Basin,2007,16(6):726-731.]
[10] RUSSON M G,FAROK Vakil.Population.Convenience and distance decay in a short-haul model of United States air transportation[J].Journal of Transport Geography,1995,3(3):179-185.]
[11] 王德忠,庄仁兴.区域经济联系定量分析初探-以上海与苏锡常地区经济联系为例[J].地理科学,1996,16(1):51-57.[WANG Dezhong,ZHUANG Renxing.The preliminary probe into the quantitative analysis of regional economic links:A case study on economic links between Su-Xi-Chang and Shanghai[J].Scientia Geographica Sinica,1996,16(1):51-57.]
[12] 李国平,王立明,杨开忠.深圳与珠江三角洲区域经济联系的测度及分析[J].经济地理,2001,21(1):33-37.[LI Guoping,WANG Liming,YANG Kaizhong.The measurement and analysis of economic relationship between Shenzhen and Zhujiang Delta[J].Economic Geography,2001,21(1):33-37.]
[13] 孟德友,陆玉麒.高速铁路对河南沿线城市可达性及经济联系的影响[J].地理科学,2011,31(5),537-543.[MENG Deyou,LU Yuqi.Impact of high-speed railway on accessibility and economic linkage of cities along the railway in Henan Province,China[J].Scientia Geographica Sinica,2011,31(5),537-543.]
[14] 孟德友,陆玉麒.基于引力模型的江苏区域经济联系强度与方向[J].地理科学进展,2009,28(5),697-704.[MENG Deyou,LU Yuqi.Strength and direction of regional economic linkage in Jiangsu Province based on gravity model[J].Progress in Geography,2009,28(5):697-704.]
[15] 徐维祥,陈斌,李一曼.基于陆路交通的浙江省城市可达性及经济联系研究[J].经济地理,2013,33(12):49-53.[XU Weixiang,CHEN Bin,LI Yiman.The accessibility and eco-nomic linkage of urban areas in Zhejiang Province based on land communication[J].Economic Geography,2013,33(12):49-53.]
[16] 史琴琴,康江江,鲁丰先,等.山西省县域可达性及城市经济联系格局[J].地理科学进展,2016,35(11),1340-1351.[SHI Qinqin,KANG Jiangjiang,LU Fengxian,et al.Accessibility and urban economic linkages of counties in Shanxi Province[J].Progress in Geography,2016,35(11):1340-1351.]
[17] 张志忠,杨大庆.乌鲁木齐河流域积雪状况及其对公路的影响[J].干旱区地理,1992,15(4):78-84.[ZHANG Zhizhong,YANG Daqing.Seasonal snow cover and its effect to the highway transportation in the Urumqi River Basin[J].Arid Land Geography,1992,15(4):78-84.]
[18] 杨发相,穆桂金,雷加强,等.新疆地貌及其过程对公路交通建设的影响[J].干旱区地理,2004,27(4):525-529.[YANG Faxiang,MU Guijin,LEI Jiaqiang,et al.Influences of the landforms and their processes on the construction of highways in Xinjiang[J].Arid Land Geography,2004,27(4):525-529.]
[19] 王绍令,林清,赵林.青康公路(国道214线)沿线的多年冻土[J].干旱区地理,1999,22(2):42-49.[WANG Shaoling,LIN Qing,ZHAO Lin.Permafrost along the Qing-kang Highway (national highway no.214)[J].Arid Land Geography,1999,22(2):42-49.]
[20] 李玲琴,马海州.青海交通建设与社会经济发展研究[J].干旱区地理,1996,19(1):78-80.[LI Lingqin,MA Haizhou.Study on the traffic construction and the social economic development in Qinghai Province[J].Arid Land Geography.1996,19(1):78-80.]
