Decision Model of Relief Distribution System for Earthquake Disaster
|關鍵字:||震災;物流系統;數學規劃;earthquake disaster;logistics system;mathematical programming|
It was found that logistics system of rescue materials is one of the important relieving tasks in the Chi-Chi great earthquake disaster area. To deliver the rescue materials from outside area into the demand points of disaster area efficiently can improve the efficiency of whole rescue tasks. There are two major elements in the relief distribution system（RDS）：the locations of collecting and distribution stations（CDS）, and the vehicles routing. The RDS and its operational mechanism should be drawn up before the disaster. Furthermore, based on the actual damage situations, the RDS must be adjusted as soon as possible. Therefore, a decision support system to design the RDS systematically and efficiently is very important. This research explored the operational mechanism of RDS in earthquake disaster area, and developed the decision model by mathematical programming. Two levels of CDS were considered in this study：the regional CDS operated by county government and the local CDS operated by township government. Two types of decision models were discussed in this research. One is a bi-level programming, in which two levels of CDS are distributed by decision makers individually, for the practical operational mechanism. Another is a single level programming, in which all of CDS are distributed by single decision maker simultaneously, for the ideal operational mechanism. On the other hand, the problem considering the locations of CDS and vehicles routing simultaneously is too large to solve efficiently. The decision model developed in this research analyzes the locations of CDS and vehicles routing separately by which the approximate optimum results can be recommended in a reasonable calculating time. In order to verify the operational feasibility and functions of decision model, a case study in the disaster area of Chi-Chi great earthquake was proceeded by the use of GIS and LINGO package. There were three major conclusions in this study. First, the distribution of CDS designed by developed model is better than the actual distribution of Chi-Chi case in total travel time. Second, single decision maker to distribute regional CDS and local CDS simultaneously is better than that of two decision makers in total travel time. Third, since the needs on rescue materials were large and most of vehicles shuttled between specified CDS and demand area, the locations of CDS and vehicles routing can be analyzed separately to improve the efficiency of model resolution.
|Appears in Collections:||Thesis|