• 研究论文 •

### 长江中游城市网络结构韧性评估及其优化策略

1. 1. 华中科技大学建筑与城市规划学院,湖北省城镇化工程技术研究中心,武汉 430074
2. 清华大学建筑学院,北京 100084
• 收稿日期:2018-01-04 修回日期:2018-04-02 出版日期:2018-06-10 发布日期:2018-06-10
• 作者简介:

作者简介：彭翀（1980- ）,女,湖北武汉人,教授,主要从事城市与区域发展研究。E-mail: pengchong@hust.edu.cn

• 基金资助:
国家自然科学基金重大项目（41590844）;国家自然科学基金项目（51778253,51608213）;中央高校基;本科研业务费资助项目（2016YXMS054）

### Evaluation and optimization strategy of city network structural resilience in the middle reaches of Yangtze River

Chong PENG1(), Yingzi LIN1, Chaolin GU2

1. 1. School of Architecture and Urban Planning, Huazhong University of Science and Technology, Urbanization Engineering Technology Research Center of Hubei Province, Wuhan 430074, China
2. School of Architecture, Tsinghua University, Beijing 100084, China
• Received:2018-01-04 Revised:2018-04-02 Online:2018-06-10 Published:2018-06-10
• About author:

Author: Shi Zhenqin (1988-), PhD, specialized in regional development and land space management in mountain areas. E-mail: kevinszq@163.com

*Corresponding author: Deng Wei (1957-), Professor, specialized in mountain environment and regional development.

E-mail: dengwei@imde.ac.cn

Abstract:

The structural resilience of a city network is a rising concept in the field of regional resilience; it focuses on how structural properties affect a region responding to external shocks, as well as recovering, maintaining, or improving the characteristics and key functions of the original system, which is of great significance to the healthy development of regional space. With the help of the Gephi social network analysis tool, this article takes the urban agglomeration in the middle reaches of the Yangtze River as the example and constructs three kinds of networks of economy, information, and transportation, and attempts to measure the structural resilience of the network and spatial characteristics of urban agglomerations. The results show that the structure of the urban agglomeration in the middle reaches of the Yangtze River has a certain resilience. Specifically, the study includes four distinct dimensions: (1) Hierarchy. Economy and information networks have higher levels of hierarchy, and regional locking is more prominent. (2) Assortativity. The disassortativity of information and transportation networks is evident, and they have heterogeneous and diverse contact paths. The economy network has weak disassortativity, leading to an inhibited structural resilience. (3) Transmission. The average path length of the above three networks is generally long and the diffusion efficiency of the material flow is satisfactory. (4) Clustering. Although the spatial clustering of the three network types is different, the aggregation degree is high and the level is equivalent. In a word, the aggregation effect of the three networks is obvious. From the perspective of spatial structure, the structural resilience presents three characteristics. (1) Disparity of the overall morphological patterns. The economy network mainly presents the structural model of "broken core-heterogeneous nested triangle". The information network mainly presents the structural model of "core triangle-star radiation". The transportation network mainly presents the structural model of "core triangle + heterogeneous star radiation". (2) Dislocation of the classified central cities. Wuhan urban agglomeration shows a unique network structure characteristic, which will be summarized as "a single core + edge cities". The Changsha-Zhuzhou-Xiangtan city group exhibits a local network of the city's balanced trend, the performance of "core group + edge city". The comprehensive level of the Poyang Lake urban agglomeration is low, and is mainly based on the isolated structure model of the "single core" of Nanchang. (3) Diversification of the network connection characteristics. The measure of structural toughness is not dependent on the single index value—it should be combined with hierarchy, match, transmission, and clustering. Furthermore, some suggestions are put forward to optimize the spatial structure of urban agglomeration in the aspects of general structure, area structure, and element flow.