Abstract: According to the typical hierarchical structure of urban emergency shelters as well as the pattern of population transfer among these shelters, ahierarchical location model for urban emergency shelters under multi-flow pattern is formulated in this paper. Differing from the single-flow pattern, in which the affected population must be transferredfrom low-level to high-levelshelters step by step to obtain the corresponding services, the multi-flow pattern allows the affected population to get low-level services directly from high-level shelters. The proposed model is an extension of the traditional single-flow hierarchical location model, and it is more in line with the realistic situation of emergency shelters location. Moreover, it illustrated by theoretical and case analysis that the location solution obtained under multi-flow pattern not only ensures the effect of asylum but also saves resources and costs.
Keywords: emergencyshelter,hierarchicalstructure,multi-flow pattern,hierarchical location
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