Optimized Allocation of Flood Control Emergency Materials Based on Loss Quantification

Abstract

Reserve management of emergency materials for flood control is the basis for the smooth development of flood control emergency work. To optimize the allocation of flood control emergency materials in each emergency node warehouse, a multiobjective optimization model is constructed from the perspective of multiwarehouse collaborative reservation with the shortest transportation time, the lowest storage and transportation costs, and the minimum out-of-stock loss. The center of gravity method is used to address demand when constructing the quantitative function of out-of-stock loss. The NSGA-II algorithm was selected to generate the results after the method comparison to ultimately determine the Pareto solution of the model. The TOPSIS method was subsequently used to screen and determine the optimal allocation scheme to rationally determine the reserve sizes of different categories of flood control emergency materials in each warehouse. The Jiangsu provincial warehouse materials were used for empirical analysis. Some of the optimized warehouses (e.g., Zhenjiang and Xuzhou) received increased stock of critical materials such as bags, steel pipes, and shovels, whereas others (e.g., Suzhou and Yangzhou) had reduced excess inventory to avoid overstocking. Compared with the initial allocation, the optimized scheme reduces out-of-stock losses by approximately $392,000, lowers transportation costs by over $110,000, and improves the efficiency of flood control emergency scheduling, which can help management make better decisions on the allocation of flood control emergency materials in the future.