Seismic Human Loss Estimation in Tehran Using GIS

Abstract eng:
Tehran is surrounded by known active faults and the region is identified with high seismic hazard. The high level of losses related to recent earthquakes in Iran (i.e. Manjil 1990, and Bam 2003) is mainly due to bad construction and urban texture. In-depth evaluation of the seismic characteristics of the region in conjunction with urban studies will help in assessing earthquake losses more realistically. The results of such studies are essential for a proper seismic risk and disaster management. For this study, the municipality district 17 of Tehran is the area of interest because it consists largely of extremely vulnerable unreinforced masonry buildings. To mitigate the risk, it is essential to have a comprehensive knowledge of the consequences of devastating events such as to be able to plan especially for the full cycle of disaster management (mitigation, preparedness, disaster response, and recovery). This paper describes our GIS-based methodology for modeling and estimating the severity and the spatial distribution of human loss as a function of building damage. The methodology has four major stages; namely seismic hazard assumption as an input, building inventory development, building and human vulnerability functions developments and implementations, and finally producing the results in GIS.

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