GIS based analysis and assessment of tsunamy risk case study of Gocek Bay–Turkey

The event of tsunami has a high considerable impact in local and global level. The risk of tsunami cannot be eliminated but it can be efficiently assessed and analyzed for setting a possible solution to reduce its impact. During the hazard prevention, human lives and properties can be saved and environmental damage can be reduced. Determine the spatial location of the tsunami and its impacts has a vital importance for disaster management. At that stage, geographical information system becomes a major concern with its ability to provide accurately and spatially information about such a risk. Geographical Information System (GIS) as "a set of tools used for capturing, storing, manipulate, analyzing and displaying spatial data related to a spatial location for a specific problem" is used effectively to assess and analyze the risk of tsunami and help to response strategy plan. Tsunami event numerical data from historical document have been manipulated to determine the probability of tsunami event which might occurred. The aim of this study is to combine and examine different spatial data used to determine the risk relied on tsunami hazard. The obtained results are successfully used for the area where under the risk such as Göcek Bay in Turkey. Göcek is situated in north west of Fethiye District of Mugla province and it is one of the most popular Turkish premier yachting locations. Its potential tourism activity contributes on the national economic development. Furthermore, the use of GIS technology necessitates of different types of spatial data such as digital elevation Model (DEM), satellite imagery, and land use/land cover. The compilation of these data generates the elevation map, land use land cover map, inundation map and the risk map depending of different tsunami intensity values. This study combined both risk vulnerability components and data analysis for developing a tsunami mitigation planning. This approach is used to achieve this analysis and assessment that includes physical, social and economic factors, developing methodology integrating hazard measure and its risk vulnerability and apply different risk frameworks for the Göcek area. The study presents the hazard information, the vulnerabilities and different map outputs. The risk map combined the vulnrability score and hazard information while the inundation map is based on physical and historical data. The result obtained in this study can be used for different relocation process in the coastal area required by local and central government.