GIS Software usage for Determine the Flood Risk Maps
Decision-making processes for flood risk area is supported by analysis of geographical Information systems. In accordance with the meteorological data of a give basin, the basin parameters maps of the region can be extract from the GIS softwares, for example ArcGIS software. The analytic hierarchy process (AHP) is a multi-criteria decision-making technique that provides a systematic approach that includes various dependent or independent qualitative and quantitative levels to assess and integrate the effects of various factors.
In this study, the effect degree of the basin characteristics could vary greatly according to the basin, and the significance of these factors was determined by AHP (Analytic Hierarchy Process) method. These results were obtained by using Multi-Criteria Decision Analysis (MCA) and AHP techniques for flood risk map of the region. Slope, aspect, soil, geology, land use and distance to rivers maps for the flood risk map were obtained with 1/25000 scale topographic maps. Binary comparisons of these parameters were made by AHP method and the weights of the criteria were determined. In line with these objectives, flood risk maps of a part of Malatya Tohma Basin were created.
Keywords - CBS, AHP, ArcGIS, Tohma Basin