Relief Facility Locations Using P-median Weight Minimax Model

Thailand’s eastern seaboard is the fastest growing area because of several export economic zones. However, this region historically encountered flood problems because of the Monsoon season and urbanization. To be proactive, the authority must plan to locate relief facilities in advance. Hence, we deployed the P-median weight Minmax model with historical population data in flood areas to decide the relief facility locations. We also investigated three contingency plans where 1) we determined relief facilities from our model, 2) we assigned the number of relief facilities according to the population, and 3) we investigated the contingency plan to determine alternative relief locations when some districts are not suitable. We tested our model with 2015, 2016, 2017, 2018, and 2019 data.