Emergency Management

Emergency Management

Analysis of the Landslide Mechanism in Barikan Village, Taleghan County

Document Type : Original Article

Authors
Pouria Heidaryan 1
Aliakbar Sarmadi Seifi 2
1 Msc. Engineering Geology, Dept. of Geological Disasters, Natural Disasters Research Institute, Tehran, Iran
2 Msc. Geomorphology, Dept. of Geological Disasters, Natural Disasters Research Institute, Tehran, Iran
Abstract
Landslides are natural disasters that occur mainly in mountainous areas and cause, disruption to the morphology of the region and cause major damage to residential areas, roads, agricultural lands, etc. For this reason, the landslide phenomenon and its mechanisms must be analyzed. This article examines the causes of slope instability in Barikan village, located in Taleghan County, Alborz Province. Barikan village has been experiencing intermittent instability of slope movements at different times from the early 2000s to the early 2010s, the most severe of which occurred after a stormy period in the late winter of 2018 and early spring of 2019, causing significant damage to buildings in the old village context and other areas in the village. This research is the result of sustainability studies conducted through field visits and observations of the village of Barikan and geological surveys. To complete the studies and obtain the resistance properties of the geological materials present in the village landslide area, geotechnical and geophysical studies were designed and implemented using site identification tests. Next, rainfall data is analyzed for numerical analysis of slope stability and changes in slope failure mechanisms before and after rainfall. The results of the studies obtained indicate that the safety factor decreases significantly after a 2-month rainfall period with a rainfall intensity of about 5 times the long-term average. Finally, the performance of two slope stability improvement strategies to reduce landslide risk has been evaluated. The results of this study can provide insights into the impacts of rainfall changes in Iran for future geosystem designs, land hazard prediction, and the selection of rainfall-induced landslide mitigation strategies.
Keywords
Landslide
Stability analysis
Rainfall
Mechanism
Subjects

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  • Receive Date 02 September 2024
  • Revise Date 20 January 2025
  • Accept Date 03 January 2025