Landslide Measurement in Glendroud Region (From the Central Part of Noor City) in Mazandaran Province Iran by Using Remote Sensing and Radar Interferometry Techniques

Abstract

Studying and monitoring the amount of displacement caused by changes in the shape of the earth's surface is one of the important and practical studies in various topics of geology and geophysics, which plays a significant role in the prevention and behavior of natural disasters such as earthquakes, subsidence, and landslides. Among them, there are various methods for geodetic measurements and monitoring of these deformations, among them the radar interferometric technique with the capabilities of producing wide, frequent and continuous ground covers, as well as high temporal and spatial resolution, is one of the techniques has become importantand significant. Landslides in the Yilagh area of GlenrodRoyan, Noor city, caused a lot of damage to some residential areas, gardens and roads of several villages in the region. Due to the movement of the earth, water and electricity have been cut off in some areas. About one kilometer of the north-south road has been destroyed and the most damage has been done to the houses of Foulad welfare complex. After passing through a long period (more than 60 years) of drought, the country of Iran has faced various risks in recent years, especially in 2018 and 2019, including floods and landslides. The aim of this thesis is to obtain the amount of displacements caused by the landslide in Glenrod region in 2019 using sentinel-1 satellite images by using the differential radar interferometry method using snap software. In this regard, from 4 satellite images It has been used during the years 2019-2020, and according to the results obtained, the largest landslide during the second period was 15 cm, which is based on the information obtained from the mapping organization and the opinion of geologists and experts in the region who stated that the largest displacement in area under report was March 2019 and it matches with the findings carried out by the present authors.