摘要
作为我国省际间最为重要的交通运输方式,铁路交通的便捷度提升对于改善省际社会经济联系有着重要的支撑作用。基于铁路交通网络把各省区省会城市抽象为网络中的节点,以2003、2007年省会城市间铁路客运加权平均最短旅行时间为度量指标,探讨我国第五、六次铁路客运提速前后省际可达性的时空变化及空间格局。研究发现,经过第五、六次铁路客运提速,全国各省区的省际可达性整体上获得了较高的提升,尤其是西部地区省区的可达性提升幅度更高;省际可达性水平表现出自东部沿海省区向西北内陆逐渐降低的圈层式阶梯状空间格局,可达性中心区的范围在逐步扩展,干线指向性越来越强;而省际可达性变动幅度则呈现出由东部沿海向西北内陆增大的圈层式阶梯状地域格局,兰新沿线地区构成全国省际可达性变动的极值区。经过对2003、2007年省际可达性时空变化及空间格局的深入探讨,从客观上论证了铁路客运提速对提升全国各地区省际可达性、加强地区经济联系的重要作用和现实意义。
Rail transportation has been considered to be one of the most importment modes of transportation at present.And,the promotion of accessibility of railway can play an importment role in imporving interprovincial social-economic communications.In the paper,provincial capital cities are assumed to be the nodes in the railway network,and taking weighted average shortest travel time between provincial capital cities in 2003 and 2007 as target,the evolution and spatial pattern of interprovincial accessibility are measured and contrasted before and after the 5th and 6th train-speed network upgrading.Results show that,through fifth and sixth upgrading,the accessibility level has been greatly improved all over the country,and particularly,the accessibility promotion are higher in west provinces than the others.The stepped spatial pattern of the accessibiliy level that reduces gradually from the east coastal provinces to the northwest provinces in China has appeared.The scope of the accessibility central zone is expanding gradually,and the primary railway line are becoming stronger and stronger.On the contrary,the accessibility variation are increasing from the east coastal provinces to the northwest provinces,and the zone along the railway from the Lanzhou to the Urumchi is becoming the zone with the maximum accessibility variation.The significance and function of railway upgrading to the promotion of accessibility and the strengtherning of regional social-economic communication are confirmed objectively by analyzing the evolution and spatial pattern of railway accessibility.
出处
《地理科学进展》
CSCD
北大核心
2010年第6期709-715,共7页
Progress in Geography
基金
国家自然科学基金项目(40771075)
河南省政府决策研究招标课题(B386)
关键词
铁路客运提速
铁路交通网络
可达性
中国
train-speed upgrading
railway transportation network
accessibility
China
