Investigating land subsidence in the Sarkhun gas field using Persistent Scatterer Interferometry

Azargoshayesh, Zahra; Amini, Amirshahrokh

doi:10.22059/eoge.2023.352977.1130

Investigating land subsidence in the Sarkhun gas field using Persistent Scatterer Interferometry

Document Type : Original Article

Authors

¹ Master&#039;s student in Remote Sensing, Faculty of Technical Engineering, Islamic Azad University, South Tehran Branch, Tehran, Iran

² 2Assistant professor of Remote Sensing Department, Islamic Azad University, South Tehran Branch, Tehran, Iran

10.22059/eoge.2023.352977.1130

Abstract

Land subsidence due to gas extraction in the Sarkhun gas field, 20 km northeast of Bandar Abbas, Iran, is investigated and evaluated in this study. For this purpose, the Stanford Method for Persistent Scatterers (StaMPS) package was employed to process 46 descending Sentinel-1A satellite images were collected between 20190111 to 20220309, and 28 ascending Sentinel-1A satellite images collected between 20200111 to 20220217 to extract the displacement along the line of sight of the satellite and due to the occurrence of an earthquake on November 14, 2021 near the gas field with a magnitude of 6.4 and 6.3 in Fin city of Hormozgan province, land surface deformation was measured in the two stages before and after the earthquake for each track to understanding the effect of the earthquake on the behavior of displacement in the study area, and the presence of subsidence in the Sarkhun gas field was seen in the results of the two tracks. The calculated subsidence results for two tracks, descending 166 and ascending 57, and for before and after the earthquake are: During the years 20190111 to 20211028 along the LOS for descending data until before the earthquake is between 6.8 and -9.1 mm per year and during the years 20190111 to 20220309, until after the earthquake is between 5.8 and -7.2 mm per year. During the years 20200111 to 20211113 along the LOS for ascending data before the earthquake is between -23.4 and 12.9 mm per year and during the years 20200111 to 20220217, after the earthquake is -17.4 and 11.1.

Keywords