Investigation on causes of the Siruyeh Landslide, West Semirom (Iran) |
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| Authors: | M Hashemi A Babaahmadi R Ajalloeian H Safaei M R Rahnama |
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| Institution: | (1) Department of Civil Eng, University of Isfahan, Isfahan, Iran;(2) Engineering Geology Group, Department of Geology, University of Isfahan, Isfahan, Iran;(3) Faculty of Science, Tarbiat Modares University, Tehran, Iran;(4) Natural Resources Department, Soil Conservation and Watershed Management Office, Isfahan, Iran |
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| Abstract: | The Siruyeh landslide occurred at the eastern side of the Siruyeh valley, 22 km west of Semirom city, south of Esfahān on
25th March, 2005 with large dimensions (2,400 m long, 450 m wide with total area of 1 km2). The sliding mass blocked the Siruyeh River making a 35-m-high natural dam and 6-acre lake 570,000 m3 in volume that poses a potential threat for the area. The landslide occurred in soil and intensely weathered marls of the
Tarbur and Kashkan Formations (upper Cretaceous–Paleocene age). The overall comparison and interpretation of the gathered
evidence from satellite images, field trips, and laboratory tests show that the most important factors involved in triggering
the Siruyeh landslide in order of importance are heavy precipitation and snow melt and intense concentration of faults and
fractures as well as weathered and weak lithology. |
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| Keywords: | Siruyeh landslide Remote sensing Faults and fractures concentration map |
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