摘要
交通流是社会经济空间联系的直观反映,其距离衰减规律对空间秩序的形成与演化意义重大。利用2016年10月份的福建省高速公路收费站数据,以县区为基本单位,识别高速公路流O-D矩阵;在此基础上,利用空模型法模拟省和县区2个尺度上高速公路流的距离衰减规律,并结合空间分析和相关分析法,探讨高速公路流距离衰减规律的空间分异特征与规律。结果显示,(1)高速公路流主要集中在0~200 km与0~200 min区段,较好地契合了公路运输的经济半径与交通流的时空断裂特征;(2)省域层面上,高速公路流随距离的增加有显著的衰减趋势,当采用路网距离、幂律型衰减函数时,距离衰减系数为2.674,显著高于常规所选数值2;(3)不同县区高速公路流的距离衰减速度在空间上呈显著的圈层模式,与高速公路流的空间分布形成较好的耦合关系;(4)距离衰减规律内生于社会经济空间联系格局,不仅影响空间秩序的形成与演化,也会受空间秩序演化的影响,一定条件下,节点的对外社会经济空间联系强度会随节点规模、人口与经济密度的提高以及区位条件的优化形成自我加速的反馈过程,形成循环累积效应。
As the basic law of geography,the law of distance-decay is of great significance to the formation and evolution of spatial order.Using the data of Fujian expressway toll stations in October 2016,an expressway flow origin-destination matrix was identified with county areas as the basic unit.Cumulative proportion curve,spectrum analysis,and null model were used to simulate the distance-decay effect of expressway flow on the provincial and county scales.Then,combining spatial analysis and correlation analysis,the spatial differentiation characteristics and the distance-decay effect of expressway flow were discussed.The results show that：（1） The expressway flow is mainly concentrated in the 0~200 km and 0~200 min sections,which is in line with the economic radius of road transportation and the temporal and spatial fracture characteristics of traffic flow.（2） The expressway flow has a significant decreasing tendency on the provincial scale with the increase of distance.When using the road distance and power-law decay function,the distance decay coefficient is 2.674,which is significantly higher than the conventional value of 2.（3） The distance-decay rates of the expressway flow in different counties show a clear zonal pattern,corresponding well with the spatial distribution of expressway flow.（4） The law of distance-decay not only influences the evolution of spatial order,but also is influenced by the evolution of spatial order,and it is endogenous to the spatial patterns of socioeconomic activities.Under certain conditions,the strength of socioeconomic spatial connections will form a self accelerating feedback process with the increase of node size,population,and economic density,and the optimization of location conditions.
作者
陈卓
金凤君
杨宇
王伟
CHEN Zhuo;JIY Fengjun;YANG Yu;WANG Wei(Institute of Geographic Sciences and Natural Resources Research,Key Laboratory of Regional Sustainable Development Modeling,CAS,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Geography,Beijing Normal University,Beijing 100875,China)
出处
《地理科学进展》
CSSCI
CSCD
北大核心
2018年第8期1086-1095,共10页
Progress in Geography
基金
国家自然科学基金项目(41771134)
交通部战略规划政策项目(2017-14-14)~~
关键词
高速公路流
距离衰减
空间分异
空模型法
相关分析
福建省
expressway flow
distance-decay
spatial differentiation
null model
correlation analysis
FujianProvince
