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The balanced layout of emergency shelters, which can be measured by spatial accessibility, is an important componentof the urban disaster prevention and mitigation system. Among the various research methods, the two-step floating catchment area method (2SFCA) is a more comprehensive and convenient way. To address the problems in the 2SFCA method applied in the emergency shelter accessibility, we propose a 2SFCA method coupled with the network analysis method to evaluate the shelter accessibility in Changchun and find the problems of the emergency shelter layout and finally put forward the corresponding planning advice. The results indicate that the equity of the emergency shelter layout is poor in some area of Changchun, and the shelter distribution needs to be adjusted according to the trend of 作者简介:朱晓萌(1994-),女,湖北省黄石人,硕 士研究生,主要从事城市生态安全评价与管理研究, Email: zhuxm712@nenu.edu.cn. *通讯作者:佟志军(1977-),男,辽宁省兴城人,副 教授,硕士生导师,主要从事 3S技术及其在灾害风险 评价与应急决策等研究,Email:gis@nenu.edu.cn the population and road distribution.

Evaluation of Emergency Shelter Accessibility Based on the Two-step Floating Catchment Area Method in Changchun