Application of morphotectonic indices in landslide hazard Evaluation around Lorestan railway region

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AFSHARI AMIR; Ghohrodi tali Manizheh; Sadough Seyed Hasan; EHTESHAMI MOINABADI MOHSEN

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Journal: ENVIRONMENTAL HAZARDS MANAGEMENT Year:2019 | Volume:6 | Issue:1 Page(s): 51-66

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Title

Application of morphotectonic indices in landslide hazard Evaluation around Lorestan railway region

Author(s)

AFSHARI AMIR | Ghohrodi tali Manizheh | Sadough Seyed Hasan | EHTESHAMI MOINABADI MOHSEN | Issue Writer Certificate

Keywords

TectonicQ2

morphoTectonic indicesQ1

Lorestan region railwayQ2

LandslideQ1

Abstract

One of the most important natural hazards that reduce the safety of railways are those caused by slopes and Landslides, which annually cause injuries and fatalities, thus identifying areas with potential risk can prevent such incidents. The purpose of this study is to evaluate the Lorestan railway region in terms of Tectonic activity and the impact of these activities on the creation and intensification of Landslide movements in this region. We used seven significant morphometric indices for this evaluation: stream length gradient (SL), drainage basin asymmetry(Af), Transverse topographic symmetry factor(T), hypsometric integral (Hi), ratio of valley floor width to valley height (Vf), drainage basin shape (Bs), and v ratio index. The combined analyzed indices represented the relatively active Tectonics (Iat). Landslides were also identified by satellite imagery, topographic and geological maps, and field survey. In the next step, the method of analysis of variance was used to establish a quantitative relationship between the observed Landslides and Tectonic indices in the sub-basins. Due to the lack of homogeneity of the indices, its value standardized with Z scale and for communication between the indicator and field observations, the linear regression model was calculated. the results showed that the study area is young in terms of neoTectonic activity, but the activity level is not the same in all places, so that basins number 12, 3 and 1 have the highest activity in terms of Tectonic and in basins number 13, 11, 10 and 9, there is relatively little activity. The maximum Landslide occurrences around the railways are observed in basins 12 and 5. And according to field observations, more than 80 percent of the total Landslide in the area between the Drood to the Tang-7 station is in the range of high Tectonic activity, which indicates the relationship between Tectonic activity and Landslide frequency in this region.

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APA: Copy

AFSHARI, AMIR, Ghohrodi tali, Manizheh, Sadough, Seyed Hasan, & EHTESHAMI MOINABADI, MOHSEN. (2019). Application of morphotectonic indices in landslide hazard Evaluation around Lorestan railway region. ENVIRONMENTAL HAZARDS MANAGEMENT, 6(1 ), 51-66. SID. https://sid.ir/paper/386466/en

Vancouver: Copy

AFSHARI AMIR, Ghohrodi tali Manizheh, Sadough Seyed Hasan, EHTESHAMI MOINABADI MOHSEN. Application of morphotectonic indices in landslide hazard Evaluation around Lorestan railway region. ENVIRONMENTAL HAZARDS MANAGEMENT[Internet]. 2019;6(1 ):51-66. Available from: https://sid.ir/paper/386466/en

IEEE: Copy

AMIR AFSHARI, Manizheh Ghohrodi tali, Seyed Hasan Sadough, and MOHSEN EHTESHAMI MOINABADI, “Application of morphotectonic indices in landslide hazard Evaluation around Lorestan railway region,” ENVIRONMENTAL HAZARDS MANAGEMENT, vol. 6, no. 1 , pp. 51–66, 2019, [Online]. Available: https://sid.ir/paper/386466/en

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