فهرست مطالب mohammad mohammadhasani

Earthquakes are one of the most important environmental hazards, which have usually been associated with the human and financial damages. In addition to its effects on residential areas, earthquake causes displacements and changes in the ground's surface. Iranian plate is located in the convergence zone of the Arabian plate in the southwest and the Eurasian plate in the northeast; therefore, it is a tectonically unstable area. The earth's deformation and the subsidence resulting from the destructive earthquake occurrence have been as the most important natural hazards in this plate.Several methods are used to study the effects of natural hazards on the land and settlements. Radar interference technique is one of the practical methods in investigating and measuring the amount of displacement. In recent years, many space sensors have been collecting data from the surface of the earth, one of the most successful of which is the Sentinel project. Sentinel-1 is the radar section of the Sentinel project, which captures images of the Earth's surface at intervals of several days and is therefore suitable for monitoring surface changes and estimating the amount of earth movement using the radar interferometry method. In this article, the deformation related to the March 16, 2022 Kookhord-Bastak earthquake (Mw6) in the Hormozgan province is measured. The results show 19 cm of subsidence and 14 cm of uplift along the fault plane and around area during the earthquake.

The subsidence caused by the increase in the exploitation of groundwater resources has a long history compared to its restoration potential in some internal regions of Iran. In recent years, land subsidence has caused serious environmental hazards in various plains and regions of Iran. Land subsidence is one of the environmental hazards that humans have faced in recent decades due to uncontrolled extraction of groundwater resources. This phenomenon, like other hazards such as earthquakes, droughts, floods, storms, landslides, etc., is one of the obstacles to socio-economic and development. The subsidence phenomenon is usually associated with many risks. This phenomenon can cause infrastructural, natural and ultimately damage to society and the economy. In recent years in Iran, with the increase in subsidence, buildings, airports, bridges, tunnels, streets, rail and road lines have been severely damaged. For this purpose, in this study, the amount of land subsidence in Kerman airport was analyzed using Sentinel-1 satellite radar images from 2014 to 2020 in Snap software using radar interference measurement technique. The subsidence rate of this range from 2014 to 2017 is at least 3.3 cm and maximum 6 cm, from 2017 to 2020 at least 3.6 cm and maximum 2.13 cm and from January 2020 to April was a minimum of 0.03 cm and a maximum of 13.2 cm, which shows a significant increase. Increased utilization of groundwater resources, compaction due to land drainage and compression due to the imposition of heavy loads (aircraft, structural loads, etc.) can be mentioned as main factors of subsidence in this area.