Farhad jaafari - Doctoral Student,Geomorphology Department, Kharazmi University,

.Risk is defined as the willing or unwilling expose of humans and their belongings to hazard. Analysis of areas located within risk zones is a scientific measure for preparation of appropriate basic information of the level and severity of the risk event. In this work, a part of Tehran Plain (Varamin) was analyzed considering the effects of morphological subsidence phenomenon and the risk zones were analyzed within it. To this aim, first using the interferometric synthetic aperture radar (InSAR) technique, the subsidence rate and domain of the study area, which is 6 cm for the study period, was extracted. Next, using the obtained data risk zones were determined. The results showed that 36%, 34.3%, 14.6%, and 15.1% of the study area is located within the zone with relatively low risk , relatively high risk , high risk , and very high risk , respectively.

Risk; Subsidence; Interferometric synthetic aperture radar (InSAR); Varamin