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High resolution tsunami vulnerability assessment by GISbased multicriteria decision making analysis at Yenikapı İstanbul
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Date
2015
Author
Çankaya, Zeynep Ceren
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İstanbul is a mega city with its various coastal utilities located at the northern coast of the Sea of Marmara. At Yenikapı, there are critical vulnerable coastal utilities, structures and active metropolitan life. Fishery ports, commercial ports, small craft harbors, passenger terminals of intercity maritime transportation, water front commercial and/or recreational structures with residential/commercial areas and public utility areas are some examples of coastal utilization which are vulnerable against marine disasters. Therefore, tsunami vulnerability of Yenikapı region is an important issue of İstanbul. In this study, a new methodology of hazard analysis for areas under tsunami attack is proposed, where Yenikapı region is chosen for a case study. Available datasets of İstanbul Metropolitan Municipality (IMM) and Turkish Navy are used as inputs for high resolution GIS-based MCDA assessment of tsunami hazard in Yenikapı. Bathymetry and topography database is used for high resolution tsunami numerical modeling where the tsunami parameters from deterministically defined worst case scenarios are computed from simulations using tsunami numerical model NAMI DANCE. In order to define tsunami vulnerability of the region, two aspects vulnerability at location and evacuation resilience maps were created using AHP method of MCDA. Vulnerability map is composed of metropolitan use, geology, elevation, and distance from shoreline layers, whereas the evacuation resilience layer is formed by slope, distance within flat areas, distance to buildings and distance to road networks layers. The tsunami hazard map is then computed by proposed new relation which uses flow depth map, vulnerability at location map and evacuation resilience maps.
Subject Keywords
Tsunamis.
,
Tsunami damage.
,
Tsunami hazard zones.
,
Geographic information systems.
URI
http://etd.lib.metu.edu.tr/upload/12618412/index.pdf
https://hdl.handle.net/11511/24378
Collections
Graduate School of Natural and Applied Sciences, Thesis
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Z. C. Çankaya, “High resolution tsunami vulnerability assessment by GISbased multicriteria decision making analysis at Yenikapı İstanbul,” M.S. - Master of Science, Middle East Technical University, 2015.