OPTIMAL FACILITY INVESTMENT DESIGN BASED ON BIMODAL TSUNAMI EVACUATION PLANNING MODEL

It is necessary to construct an evacuation plan against tsunami disaster considering the requirement of each region. The investment plan of evacuation-related facilities and transport network should be efficient depending on geographical conditions and the expected arrival time of the Tsunami. However, concrete and effective planning methods to discuss such plans have not been established yet. Hence, this paper attempts to constructs a optimal evacuation planning model on bimodal that minimizes time to finish evacuation. This model is able to propose the optimal evacuation method as the whole region. In addition this model is extended to a network design problem where the objective of the upper-level problem is to mini-mise the total investment cost while ensuring that the evacuation time is smaller than a predetermined value, which is formulated as a lower-level problem. Moreover, the proposed models are applied onto the practical network to seek for an optimal evacuation plan considering the conditions such as the population of each area, the arrival time of the tsunami, the situation of the evacuation facility.