Measuring the Vulnerability of the Urban Fabric in the Face of Land Subsidence (Case Study: District 17 of Tehran)

Urban vulnerability is the probability of damage to cities and urban infrastructures against natural unnatural events. In this regard, in last half century, land subsidence has involved many countries as a potential risk for urban, industrial agricultural areas. With occurrence subsidence, physical structural characteristics structures built city are changed show different behavior. For reason, it important consider effect on fabric which there exposed buried structures. The involvement 17th district Tehran with issue was initial idea current research. Currently, maximum rate area 25 cm per year. present research been carried out form spatial studies by implementing analytical model four steps. results implementation showed that prone high due features such population building density, presence worn-out fabric, buildings low strength very construction quality buildings. total, about 657 hectares (80 percent) built-up lands under influence subsidence.