Abstract: To optimize emergency logistics system for relief delivery during the initial post-earthquake period, the joint decision of emergency facility location-allocation and multimodal transportation scheduling are investigated. A multi-objective location-multimodal transportation model is developed to minimize the total delivery time and total losses due to insufficient supplies. A no-dominate sort genetic algorithm based on bi-dimension encoding method is proposed and its algorithm complexity is analyzed. The results of a numerical example show that the algorithm can find the Pareto front and attain varied optimal solutions on the Pareto front according to the preferences of decision makers.

Key words: earthquake disasters, relief materials, location, multimodal transportation, multi-objective optimization, genetic algorithm