Urban Facilities Earthquake Vulnerability assessment, Case Study: Ghodghun neighborhood of Borujerd

Abstract

Infrastructures such as water, sewage, electricity, gas and etc. are some of the crucial living conditions of neighborhoods in cities. The deficiency of the performance in any part of the facility disrupts the life of the neighborhood. Therefore, measuring the vulnerability of urban facilities and their current status are the first steps in reducing urban vulnerability. The purpose of this study is applying the fundamental knowledge of vulnerability assessment in practical and quantitative approach to assessing the vulnerability of the facility against earthquake in two categories of objective and managerial indicators (each of which has sub-indicators weighed in the Delphi-AHP method and their maps are generated in the GIS software) in the scale of the Ghodghun neighborhood of Borujerd. The results of field studies and interviews with relevant authorities indicate that after 12 years since the beginning of the reconstruction process, 27% of sewage pipes, 35% of urban water pipes, 80% of electrical wires, 24% of wooden beams, 51% Of gas pipes replaced, while due to the lack of systematic seismic standards and the facility disaster management plans, has led to a slight decrease in the facility vulnerability. The vulnerability assessment results of the facility in the objective indicators show that all five indicators of sewage pipes, urban water, electricity, gas, and telecommunication have a number higher than 3 out of 5; and in management indicators of 6 The index, the existence of standard and planning indicators above 4, the indicators of congestion and utilities in the range of 2-3 out of 5 have been evaluated. In total, the vulnerability number of the facility in the two categories of objective and managerial indicators is 3.47 and 2.805, out of 0-5 range, which, in the weighted combination facility vulnerability, is estimated 3.2496 which evaluated a Medium upward.

Keywords

• urban facilities
• vulnerability assessment
• borujerd ghodghun neighborhood
• earthquake