موقعیت زمین ریخت شناختی شهرهای ایران و برخی از محدودیت ها و مزایای ناشی از آن

The purpose of this study is: to determine the geomorphological setting; to assess earthquake, flood, and subsidence hazards, as well as to evaluate the landscape of Iranian urban areas, based on geomorphological criteria. To access the aim, ۲۱۰ cities, each one having more than ۵۰,۰۰۰ population, were investigated. In this study, Google Earth and satellite pictures, aerial photographs, and geological and geomorphological maps were used and, if needed, field investigations were undertaken. This study showed that the number of urban areas totally or partly lie on alluvial fans, flat surfaces, terraces, synclines, piedmonts, anticlines, and deltas are ۱۰۳, ۳۴, ۲۶, ۳۹, ۲۷, ۸, and ۱۱ cases, respectively. The numbers on volcanic cones, cliffs, and wetlands are only ۲, ۱, and ۱ cases, respectively. Also, ۱۵۸ cases lie only on one landform and the remaining ۵۲ cases predominately lie on two kinds of landforms. There are ۸۲ and ۹۰ cities at the high threat of earthquake and flood and the numbr of cities at the threat of surficial and qanat subsidence are ۶۰ and ۴۷ cases, respectively. The urban areas with uniform and good landscapes are ۷۱ and ۵۲ cases, respectively. The presented table demonstrates the geomorphological settings; the earthquake, flood and subsidence hazard levels and the landscape status of the ۲۱۰ studied urban areas.

کلیدواژه ها:

جایگاه زمین ریخت شناختی شهر ، خطر زلزله ، خطر سیل ، خطر نشست زمین ، شهرهای ایران ، چشم انداز شهری