Document Type : پژوهشی
Authors
1 Ph.D. student in Geomorphology, Faculty of Environmental Sciences Planning, Tabriz University ,Tabriz .Iran
2 ، . Shahram Roostei- Professor of Department of Geomorphology, Faculty of Environmental Sciences Planning, Tabriz University, Tabriz. Iran
3 Ph.D. Ali Zareian - Ph.D. student in Geomorphology, Faculty of Planning and Environmental Sciences, Tabriz University. Tabriz, Iran. Email:Ali.Zareiyan1210@gmail.com
Abstract
Landslides are influenced by internal, external (climatic), and anthropogenic factors. Salavatabad Pass, located in eastern Sanandaj along the Sanandaj–Hamedan route, is a highly vulnerable area experiencing recurrent landslides. The presence of the main road, along with uncontrolled construction, gardening, and road construction, has exacerbated these hazards. This study aims to identify, quantify, and classify continuous slope movements using radar interferometry and land use analysis. To assess vegetation cover, the NDVI index was derived from eight Sentinel-2 images, aiding in the selection of appropriate radar imagery. Additionally, four Sentinel-1 images from 2020 to 2023 were processed in SNAP software to analyze surface displacements. The land use map was generated using a 2023 Landsat-8 image, with supervised classification applied in ArcGIS, categorizing the area into six classes. The results indicate an annual displacement of 2.4 cm, totaling 9.5 cm over the study period. Hazard zoning revealed that 14.45% of the area falls within the high-risk category, while 29.33% is classified as moderate risk. The road network was divided into three segments, with the first (6.59 km) and second (6.6 km) segments classified as high and moderate risk, respectively. Ultimately, 18 unstable zones were identified along the road, with 16 primarily associated with rangeland and barren land use. The highest displacements were observed on slopes with northern, northwestern, southern, and western aspects..
Keywords
Main Subjects
)