Urban Internal Network Structure and Resilience Characteristics from the Perspective of Population Mobility: A Case Study of Nanjing, China

IF 2.8 3区 地球科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS
Zherui Li, Wen Chen, Wei Liu, Zhe Cui
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Abstract

In the face of diverse chronic pressures and increased factor mobility, the resilience of urban internal network structures has become a cutting-edge research topic. This study utilizes 2019 mobile signaling big data to construct employment and recreational flow networks among 101 townships and streets within Nanjing City. Based on the characteristics of these network structures, the resilience of the network structure is measured from the perspectives of density, symmetry, and transmissibility through interruption simulation techniques. The results show that the intensity of population mobility within Nanjing presents a general decay from the central urban area to the outer layers. In the employment scenario, cross-river population mobility is more frequent, while in the recreational scenario, the natural barrier effect of the Yangtze River is prominent. Due to the concentration of employment centers and high spatial heterogeneity, the employment flow network exhibits greater vulnerability to sudden shocks. Townships and streets with weighted degree values ranking around 60 and 80 are of great importance for maintaining the normal operation of both employment and recreational flow networks. Strengthening the construction of resilient parks and village planning within resilient cities can enhance the risk resistance of employment and recreational flow networks.
人口流动视角下的城市内部网络结构与弹性特征:中国南京案例研究
面对多样化的长期压力和要素流动性的增强,城市内部网络结构的弹性已成为一个前沿研究课题。本研究利用2019手机认证送彩金大数据,构建了南京市101个乡镇街道之间的就业流和休闲流网络。根据这些网络结构的特点,通过中断模拟技术,从密度、对称性、可传递性等角度对网络结构的弹性进行了测度。结果表明,南京市人口流动强度呈现出从中心城区向外围递减的总体趋势。在就业情景下,跨江人口流动更为频繁,而在休闲情景下,长江的天然屏障效应更为突出。由于就业中心集中,空间异质性高,就业流网络更容易受到突发性冲击的影响。加权度值在 60 和 80 左右的乡镇和街道,对维持就业流和娱乐流网络的正常运行具有重要意义。加强弹性城市内的弹性园区建设和村庄规划,可以增强就业流和娱乐流网络的抗风险能力。
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来源期刊
ISPRS International Journal of Geo-Information
ISPRS International Journal of Geo-Information GEOGRAPHY, PHYSICALREMOTE SENSING&nb-REMOTE SENSING
CiteScore
6.90
自引率
11.80%
发文量
520
审稿时长
19.87 days
期刊介绍: ISPRS International Journal of Geo-Information (ISSN 2220-9964) provides an advanced forum for the science and technology of geographic information. ISPRS International Journal of Geo-Information publishes regular research papers, reviews and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. The 2018 IJGI Outstanding Reviewer Award has been launched! This award acknowledge those who have generously dedicated their time to review manuscripts submitted to IJGI. See full details at http://www.mdpi.com/journal/ijgi/awards.
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