Study on Urban Resilience Based on the Analysis of Supply Guarantee Facilities During Epidemic Closure—A Case Study of Shanghai in 2022

In the case of major public emergencies, the ability of cities to resist shocks becomes very important and reflects urban resilience.This paper selected the supply guarantee facilities during the city-wide lockdown of Shanghai during March-May 2022 due to COVID-19 pandemic as the research object.In this research, the per capita supply guarantee capacity and supply guarantee overlay intensity were analyzed based on the official list of facilities, and the actual role of the supply guarantee facilities was investigated through a public research questionnaire.The thermodynamic diagram map that was generated based on phone visits reflected the actual distribution of the population.Then the level of "supply guarantee resilience" was evaluated and graded for each district of Shanghai.It was concluded that the overall level of supply guarantee resilience was high in the central city, divergence in the near suburban districts, and generally low in the remote suburban districts.Based on this, the paper summarized the problems of supply guarantee revealed in Shanghai during the epidemic lockdown as well as proposed strategies to improve the resilience of similar scenarios in the future.With the help of big data and public research tools, this paper aimed to provide ways and methods to evaluate the resilience of cities under major public emergencies.