The main objective of this paper is to develop the model for flooding area decision including location, slope, elevation and depth of the flooding area and runoff drainage system thorough SWMM simulation DB and for the display model of the flooding areas. This model also provides the searching service to the historical flooding areas. ArcObject GIS engine and Oracle DBMS is used to model development, and the prototype system programmed with C# is applied to verify the model. The result of the model application analyzes flooding hazard areas of 143.47m2 with flooding depth of 0.08m. The six drainage systems is required improvement for discharge capacity. This research can be used the element technology of the disaster historical system for areas prone to floods.

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