Vulnerability Assessment of Urban Infrastructure by Passive Defense Criteria
Cities are the most important gathering places for human resources and decision-making centers for political, administrative, military, financial and intellectual activities. On the other hand, in most Iranian cities, urban planning is done in a general framework, and as a consequence, in case of any crisis or attack by enemy missile, all infrastructure including water systems, electricity and gas distribution network as well as the crisis management system becomes impaired. In the meantime, perhaps planning on the basis of passive defense approach largely compensates for the shortcomings of poor planning. The purpose of this study was to assess the vulnerability of urban infrastructure with the approach of passive defense in Gorgan, so a cross-sectional, field surveys and subsequent zoning and overlapping layers of information (Index Overlay), was conducted in GIS spatial analysis software. In this study, using two criteria for building density and spatial distribution, vital and susceptible installations, zoning and the use of overlapping layers in Gorgan, the results revealed that the northwest part of Gorgan, due to concentration of vital installations such as Electricity Distribution Company, IRIB and NIOPDC of Golestan Province has the highest vulnerability, requiring additional measures to be taken regarding passive defense.