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Landslide Hazard Zonation of Mazandaran Province With Emphasis on Micro-Zonation of Powerhouses in Mazandaran Province Against Landslide Hazard

Taghikhani, Parastoo | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56149 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Haeri, Mohsen
  7. Abstract:
  8. Landslides, like earthquakes, floods, and volcanoes, are important natural disasters that occur frequently in the mountainous and high regions of our country, especially in the Alborz and Zagros regions, which induce considerable damages. Various factors such as topography, lithology, weather conditions, hydrology, tectonics, earthquakes, and various human activities are effective factors in the instability of natural and man-made slopes. Not one factor can cause instability in slops, however, a combination of the named factors may cause landslides. Therefore, knowing the factors affecting the occurrence of landslides and identifying different areas in terms of sensitivity to their occurrence are among the most important and necessary measures for preventing or reducing landslide damages. The preparation of the landslide zoning map makes it possible to identify vulnerable and high-risk areas against landslides and can be considered in land development policies. In this study, Mazandaran province was considered for landslide zonation and it was accomplished using the modified Haeri and Samiee method. In general, eight factors of lithology or the type of the earth material, slope angle, fault length, road length, river length, average annual precipitation, rainfall intensity, and earthquake intensity are introduced as effective factors in the instability of slopes and triggering of landslides. According to the modified Haeri and Samiee method, five factors out of eight are internal or potential factors and three of them are triggering factors. Haeri and Samiee proposed a formulation for the combination of these parameters. An area in Mazandaran was selected for calibration of the formulation by implementing the method and extracting the importance coefficients of each factor to be used in the formulation and choose landslide hazard categories. Based on the new formulation and new ranges for landslide hazard categories, the entire area of the Mazandaran province was zoned in terms of landslide hazard and the landslide hazard zoning map of this province was prepared and presented. According to this map, about a quarter of the area of Mazandaran province is not threatened by landslides . 15% of the area of this province is in the state of low and relatively low landslide hazard, 31.64% is in the medium hazard state, and 28.85% is in the relatively high to very high risk category. Finally some of the power plants located in the Mazandara , including Siah-Bisheh Dam, Shahid Rajaei Dam and Caspian Power Plant, were zoned against the hazard of landslides
  9. Keywords:
  10. Landslide ; Zoning ; Mazandaran Province ; Microzonation ; Landslide Hazad Zonation ; Haeri-Samie Method ; Power Plants

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