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Slope Instability Hazard Zonation on the Area of Chalus Road, using GIS (Between Karaj to Gachsar)
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Morteza Jafarkhalou *   , Ali Uromiaei , Mashallah Khamechian |
| University of Tarbiat Modarres |
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Abstract: (6542 Views) |
| Passing over central part of the Alborz mountains, Karaj-Chalus Road is a major route making connection between Tehran city and north parts of Iran. This transportation road crossing over mountainous included of volcano and sedimentary deposits since Paleozoic to Eocene period such as limestone, dolomite, quartzite, diorite and tuff and gets along with slope movements and earth flows in ranges verge to the road path. In this research, a part of Karaj-Chalus road located at a distance between Karaj and Gachsar with a length of 50km and a surface area of 818m2 is studied and the final result has been presented as a slope instability zonation map. With benchmarking from different zonation methods, the effective factors on this zonation are as: lithology, slope, distance from fault, drainage network density and vegetation cover. In contrast to other methods suggested for zonation, in this study a method has been presented to be used to exclude hazard borders from sharp and clear status and, also, kriging method was used to transfer phenomenal effect existing in one unit of network to its nearby units. Field inspections as well as data available about the landslides occurred in this study zone confirmed that zonation map prepared of kriging model has discriminated ranges susceptible to instability hazard with high accuracy. |
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| Keywords: Slope instability, Zonation, Kriging, Chalus road |
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Full-Text [PDF 1735 kb]
(1590 Downloads)
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Type of Study: Research |
Received: 2015/02/19 | Accepted: 2015/02/19 | Published: 2015/02/19
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