Creation Of Flood Hazard Map On Gis Base And Examination Of Property Status In Flooded Areas

Floods are among the most damaging natural events after earthquakes. However, human activities, such as altering riverbeds, increasing riverside construction, or altering river directions, exacerbate flood risks. Flood risk maps are created based on flood recurrence data to assess potential damage. In this study, the Mert River and Yilanlidere were chosen as the study area because they caused significant loss of life and property during the flood that occurred in the Mert and Yilanlidere Rivers in Samsun. To establish the flood hazard map of the study area, Samsun Metropolitan Municipality has sixty-five 1:1000 current maps and two 1:5000 zoning maps, and annual flood repetition frequencies of 10, 25, 50, 100, 500, and 1000 years have been provided. The obtained data was then used to generate a flood hazard map based on the flood recurrence data provided in the Geographic Information System environment using the Hec-GeoRAS and HEC-RAS programs. According to the obtained flood hazard maps, the size of the flood area, the number of buildings and parcels within this area, the number of independent sections in the buildings, and the number of people in those places were determined before and after the flood reclamation work was completed in 2014 on a neighborhood basis. As a result, this study proposes whether the breeding work conducted is sufficient, whether flood insurance applies in my country, and which structures are located in the flood area.