城市道路网络在最糟糕的局部中断的情况下的弹性模式
Chongyang Du1, Min Ouyang1,2, Hui Zhang1
1School of Artificial Intelligence and Automation, Huazhong University of Science and Technology, Wuhan, China.
概括
城市道路网络的弹性在中国各地有很大差异. 与东部城市相比,西方城市对局部破坏的弹性较低,受社会经济和地理因素的影响.
科学领域:
- 城市规划和灾害管理
- 网络科学和运输工程 网络科学和运输工程
- 地理信息系统和空间分析
背景情况:
- 最近的COVID-19和极端天气等干扰突出了城市道路网络 (URN) 的脆弱性.
- 之前关于URN弹性的研究往往仅限于少数案例研究,阻碍了对弹性模式的更广泛理解.
- 了解URN弹性对于在破坏性事件期间和之后保持人类流动性和社会经济活动至关重要.
研究的目的:
- 在363个中国城市进行一个大规模的全国性URN弹性分析.
- 识别针对单局部性干扰 (SLD) 和多局部性干扰 (MLD) 的弹性模式.
- 调查导致不同城市URN弹性差异的因素.
主要方法:
- 在中国大陆363个城市的城市道路网络的全国性弹性分析.
- 评估URN对最坏情况下的单个和多个局部中断的弹性.
- 统计分析将弹性与城市社会经济,基础设施和地形因素相关联.
主要成果:
- 在62.3%的城市中,最严重的SLD发生在距离市中心5公里以内.
- 中国西部城市的平均道路网络弹性分别低于东部城市的7%和13%,在最糟糕的SLD和MLD下.
- 弹性差异与城市社会经济,基础设施和地形特征的变化有关.
结论:
- 在中国内,URN弹性模式显示出显著的地理差异.
- 与东部城市相比,中国西部城市更容易受到局部干扰.
- 调查结果可以为全国范围的灾难前减缓战略提供信息,并促进知识转移,以提高城市的弹性.
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