Estimation of subsidence in Azarshahr plain using radar interferometry and analysis of effective groundwater parameters and land use

One of the dangers that has occurred in many areas in recent years is the dangers of subsidence. Identifying areas prone to subsidence and estimating its rate plays an important role in managing and controlling this phenomenon. In this study, in order to identify and measure subsidence in Azarshahr plain, Sentinel radar images of 2015 and 2020 were used and in order to process information, SARSCAPE software was used. According to the results, the maximum subsidence rate in 5 years in the region is estimated at 6 cm. The relationship between subsidence and changes in the amount of groundwater level showed that in a period of 5 years, the groundwater level has decreased by 4 meters, which has led to land subsidence in the study area. The highest subsidence rates in the period 2015 to 2020 are in the following categories: rangeland uses with a value of 6 cm, coastal area with a value of 5 cm and garden and residential uses with a value of 4 cm. Also, the use of mountains with the same amount of approximately 3 cm has the lowest amount of subsidence. 4 cm subsidence for residential use can be caused by demolition and construction of large buildings in the long run.