长江流域资源与环境 >> 2015, Vol. 24 >> Issue (04): 548-.doi: 10.11870/cjlyzyyhj201504003

• 区域可持续发展 • 上一篇    下一篇

基于城市腹地的乡镇通达性的时空格局及其演化——以湖北荆州市112个乡镇为例

段德忠 刘承良   

  1. 1.华东师范大学城市与区域科学学院,上海 200062; 2.华东师范大学科技创新与发展战略研究中心,上海 200062
  • 出版日期:2015-04-20

SPATIALTEMPORAL PATTERN AND EVOLUTION OF TOWNSHIP ACCESSIBILITY BASED ON CITY HINTERLAND〖WT4”BZ〗〖STBZ〗——A CASE STUDY OF 112 TOWNS OF JINGZHOU CITY, HUBEI PROVINCE

DUAN Dezhong1,2, LIU Chengliang1,2   

  1. 1.College of Urban and Regional Science, East China Normal University, Shanghai 200062, China; 2.Insititute for Innovation and Strategic Studies, East China Normal University, Shanghai 20062, China
  • Online:2015-04-20

摘要:

行政边界对路网的分割效应和以出行方向机会均等为前提是当前通达性研究中的两大问题。基于2000~2011年荆州市城乡道路网空间数据库,自下而上揭示了2000~2011年荆州市乡镇通达性的时空格局及其演化特征:(1)基于城市腹地范围的乡镇通达性评价较好的模拟了乡镇的出行意愿,且实现了区内通达性与区际通达性的综合。十多年间,交通网络建设带来的城市腹地时空压缩效应显著:荆州市乡镇地域所属地级市腹地格局由荆州“一城主宰”演变为荆州和岳阳“两城瓜分”,所属县级市腹地格局也经历了由“荆州独享”到“周边共享”的发展历程;(2)十多年间,荆州市乡镇通达性空间分布基本遵循距离衰减律,呈现以荆州城区为中心的环状分布格局,且时序上表现出微观动态性和宏观稳定性特征:一是,通达性空间分布呈现由低水平集聚向优化均衡的动态性发展趋势。二是,乡镇通达性空间分布结构由核心-边缘向等级圈层结构的演进。三是,乡镇通达性发育具有时空惯性,呈现显著的快速干道指向性;(3)十多年间,荆州市乡镇通达性发育呈现出“单核单轴弱扩散”→“单核多轴强扩散”→“双核多轴全扩散”的空间演化模式。

Abstract:

Road network is the material conditions and prerequisites for forming the metropolitan area network system, and also the main channel of material flow, energy flow and information flow, which plays an important role in the socioeconomic development of metropolitan area. Accessibility is an effectively comprehensive index which can be used for evaluating the developmental level and servo efficacy of road network. Therefore, accessibility study has attracted longterm and sustained enthusiastic participation by many scholars from urban planning and transportation geography, and those who are engaged in regional development. However, the current researches still has many defects in their research methods, perspective, and scale. For example, dividing effects of administrative boundaries and taking equal opportunity for all travel direction as the prerequisite are the two big problems of the current researches on accessibility. For the inadequacies of the traditional accessibility evaluation model based on the shortest path and the narrow research perspectives, this paper reconstructed the accessibility evaluation model and weighted field model based on the shortest transit time, seted up an evaluation index system of township accessibility based on city hinterland, from bottom to top reveals the spacetime patterns and the evolution characteristics of township accessibility with the help of urbanrural road network space database from 2000 to 2011 in Jingzhou: ①Township accessibility evaluation based on city hinterland behaves better in simulating the town’s willingness to travel, and is able to realize the unity of regional accessibility and interregional accessibility. From 2000 to 2011, the optimization of traffic network brings significant time-space compression effect to city hinterland. The spatial pattern of city hinterland based on township areas evolved from “a city (Jingzhou) dominating” to “two cities (Jingzhou and Yueyang) sharing”, and the spatial pattern of county hinterland also experienced a development process from “Jingzhou exclusive” to “peripheral sharing” in the last ten years; ②From 2000 to 2011, the spatial distribution of township accessibility was found to basically follow the distance attenuation law, showing a ring pattern distribution around Jingzhou city, and exhibiting microscopic dynamic and macroscopic stability characteristics in the time sequence: First, the spatial distribution of township accessibility presents a dynamic development trend from a low level of agglomeration to optimal equilibrium. Second, the spatial structure of township accessibility evolves from core periphery to layers. Third, the development of township accessibility has significantly rapid corridors directivity and temporalspatial inertia. ③From 2000 to 2011, the spatial evolution characteristics of township accessibility was found experience a process from “single coreuniaxialweak diffusion” to “single coremulti axisstrong diffusion” to “dual coremultiaxisfull proli”

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