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G.I.S. Procedure for Flood-Prone Areas Mapping Based on the Results of the Flood Simulation Models. The development and implementation of the procedures for flood-prone area rapid mapping in the operative activity of the hydrological forecast is an important step in providing real-time information to the institutions involved in the management of the affected areas. In order to know the potentially flooded areas, a series of software programs was developed, starting from inputs resulted from the hydrological models and hydraulic routing. Representing the results of the flood simulation mathematical models, actually leads to the delimitation of the flood-prone areas. For their representation in GIS environment, it was developed a simplified procedure that uses in addition to D.T.M. only the river bed thalweg and the forecasted value of the water level in successive profiles. This paper presents the work steps of the methodology, the GIS chart model made in ArcGIS 9.2, the Builder Model module, and also a case study for the Ialomita River, on a river branch with a length of about 110 km.

Key words: rapid mapping, flood-prone areas, flood simulation, GIS.