DOI: 10.1007/s11069-020-04382-1
论文题名: Investigation of the probable trigger factor for large landslides in north of Dehdasht, Iran
作者: Nilforoushan A. ; Khamehchiyan M. ; Nikudel M.R.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 105, 期: 2 起始页码: 1891
结束页码: 1921
语种: 英语
中文关键词: Deep-seated gravitational slope deformation
; Earthquake
; Mountain front fault
; Rock avalanche
; Triggering factor
英文关键词: deformation
; earthquake
; fault zone
; landslide
; rock avalanche
; slope dynamics
; trigger mechanism
; Iran
英文摘要: Charosa and Dehdasht is a part of folded Zagros that is located in the Kohgiluyeh and Boyer-Ahmad Province in southwestern Iran. This area is covered with several Zagros anticlines such as the Kuh-e-Sefid, Sartal, Nil, and Siah. From the geological perspective, the Ilam–Sarvak formation makes the major and high altitudes of the region. Numerous landslides have occurred in the highlands of this area, with the largest known landslides being the Mundan rock avalanche in the Nil anticline with an approximate volume of more than one billion cubic meters and the Almor rock avalanche in the Sartal anticline. This study explores the probable triggering factors of these landslides based on geological studies, seismotectonic studies, and numerical modeling methods. According to the results of this research, between earthquake and groundwater (as the two major landslide-triggering factors), the earthquake was able to cause instability and slip onset. Based on seismic investigations, the Mountain front fault in the vicinity of these anticlines has high seismic potential. So, the occurrence of earthquakes with a 1000-year return period and a minimum 7.3 momentum magnitude is likely triggered by these rock avalanches. The results show that due to favorable geological and topographic conditions of the study area, the earthquake has been able to cause large and catastrophic landslides in the region’s history. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169256
Appears in Collections: 气候变化与战略
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作者单位: Department of Engineering Geology, Tarbiat Modares University, Tehran, Iran
Recommended Citation:
Nilforoushan A.,Khamehchiyan M.,Nikudel M.R.. Investigation of the probable trigger factor for large landslides in north of Dehdasht, Iran[J]. Natural Hazards,2021-01-01,105(2)