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Flood is a severe natural disaster in our country, but the overall capability of flood control nationwide is still on the low side. Along with the development and advancement of Geography Information System characterized of special functions on its spatial process and analysis, it increasingly plays an important role in preventing and reducing flood, disaster evaluation, flood risk analysis and regionalization, urban flood control and so on, which makes it an inevitable trend for the food routing model combining with GIS and RS. It is not satisfactory due to a great number of factors in existence at present. The paper discusses the integration of GIS and flood routing model on the basis of a great lot reference and literature and GIS software development’s experience, and build up their application system. The main work in the paper is as follows:1. In accordance with users’ demand, general design for the integration system of GIS and flood routing is put forward, including the goal, principle, frame of structure, guideline of technology, and function modules, etc., primarily constructing the Integration System Platform of GIS and flood routing model.2. Third generation object-oriented database Geodatabase is utilized to store the special data and attribute data all together.3. With the analysis of integration between GIS and application model, aiming at the low level of current integration, discussion has been carried out for the integration of GIS and flood routing model. The Dynamic Link Library and Component GIS are adopted to tightly couple GIS with flood routing model. GIS platform uses ArcGIS Engine and C# of Visual Studio 2005.The model is encapsulated into .dll file, which can be transferred on GIS platform. Data acquisition, processing, storage and management in integration process are explored.4. Simulate flood of occurring averagely once in one hundred years in Dongping Lake Flood as an example, and in details introduce the application of the integration system in query, display, analysis and simulation and so on.The integration system can utilize powerful query, process and analysis of GIS and numerical calculation and simulation of flood model which can make understand of the entire course of flood emergence, development and movement, and study the flood movement and behavior, then provide timely and accurate information for decision-making, evaluating the situation of flood, dealing with emergency and constituting flood risk plan.
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