Gis-Based Decision Support System Design And Implementation For Post-Earthquake Emergency Supplies Allocation And Dispatching

The unpredictable earthquake disasters often caused a large number of casualties, housing collapse, infrastructure damage, etc., therefore, the timely rescue is one of the most important measures to prevent further loss, providing victims with living necessities is one of the most important tasks. However, due to the sudden of the earthquake, the relief of manpower and material resources involved in the rescue is a complex system which needs comprehensive plan as a whole. How to allocate and distribution emergency supplies, and arrange the route for all goods which could both save time and balance the fairness of each affected point in a short time is the key to the emergency logistics support capability.Most of post-disaster emergency rescue decision support system researchs stay on theoretical research, or the material allocation and dispatching decision support system research only, there are few research of combining geographical information system (GIS) and decision support system of the post-earthquake emergency rescue. due to the material transportation roads often damaged after the quake, and can’t be repaired in short time, after making the allocation determination, selecting the best distribution goods shipped to the destination is needed, so the real-time network must be considered in the decision-making process. In this thesis, emergency supplies dispatching and transportation route selection is the research object, and GIS-based decision support system (DSS) for earthquake emergency supplies allocation and dispatching is designed and implemented.Firstly, allocation-dispatching model and earthquake emergency supplies demand forecasting were studied. Earthquake emergency supplies allocation could be divided into three distribution nodes, then assigned the subordinate relations between them, in the presence of incomplete information after the quake, under the condition of multiple nodes and several kinds of transportation, and considering the principle of efficiency and the least loss, a master-slave relationship bi-level optimization model was built. The demand forecasting model is set up by considering seasonal factors, regional factors, the population, etc.Secondly, on the basis of summarizing the characteristics of distribution of emergency supplies and dispatching after the quake, system requirements were analysed, according to those, a human-computer interaction system was designed, and the allocation and dispatching database, spatial database, model base, knowledge base and method library supported the overall structure of the system. The human-computer interaction subsystem consisted of demand forecasting, emergency supplies allocation analysis, emergency supplies transportation path analysis and system management modules. The various of modules are independent of each other, have the function for the decision respectively, and they exchange data between each other. The system manages data based on the management of the allocation and dispatching database and spatial database. Through designing the system of process and system internal data process, each module function and the connection between them can be implemented.Finally, the emergency rescue resources and spatial data are managed by SQL Server and Shapefile format to achieve the main functions of the system modules. Spatial data is managed by using C#language and ArcGIS Engine software of GIS for secondary development base on Visual Studio.NET development platform to realize visible management. Using Matlab software to program model and its algorithm, the program was compiled into files which could be called by.Net platform. The system provides a visualization assistant decision for decision makers, which could allocate and dispatch emergency supplies after earthquake and provide the shortest path decision for transportation vehicles intuitively and effectively.