Document Type : Research Paper

Authors

• Maryam Pournader ¹
• Hassan Ahmadi ²
• Jamal Ghoddosi ³
• Mohammad Reza Jafari ⁴

¹ Former MSc Student, Sciences and researches Unit, Islamic Azad University, Iran‎

² Professor, Sciences and researches Unit, Islamic Azad University, Iran‎

³ Assistant Professor, Sciences and researches Unit, Islamic Azad University, Iran‎

⁴ ‏PhD Student, Razi University, Kermanshah, Iran

Abstract

According to abundant damages and the extension of mass sliding in the country, its zonation mapping and investigating effective factors on its occurrence is necessary for preventing and control. Therefore, a research has been conducted in the Ilam dam watershed to create geologic, physiographic, Land use, vegetation cover, soil erosion, climatologic, pedologic and geomorphologic maps, using earth data layers, topographic maps, Geographic Information Systems (GIS) and field surveys. The methodology of this research has been accomplished base on distinction of geomorphologic units while using aerial photos and crossing basis maps. Then, the effective factors on mass movement occurrence were investigated using logistic regression equations. So that, the factors such as slope, geological formation, pedologic, climatic, etc. were considered as independent variables and the frequency of mass movement occurrence was considered as dependent variable. Results demonstrated that factors such as slope, geological formation, the kind and the amount of soil minerals, and land use are the most effective factors on frequency of land sliding in the watershed.

Keywords

• control
• Frequency
• geographic information systems
• Land slide
• Logistic regression