Investigation of Effective Factors on Landslides Occurrence and Landslide Hazard Zonation – Case Study Shirin Rood Drainage Basin, Sari, Iran
Kelarestaghi. A1
Fax: +98 261 2227765
Email: ata_kelarestaghi@hotmail.com
Introduction
Increasing of population in developing countries, lead to be used from lands of these countries, more than their production capacity. In addition to none regarding of land use and land use change have been resulted in soil erosion.
Geological, Topographic and Climatic condition of the area and human factors sach as land use changing and road construction are the important factors that have been caused the most landslides in the study area (4).
The investigation of triggering factors on landslides occurrence and landslide hazard zonation based on these factors is the main goals of this research.
Study area
Shirinrood drainage basin has been located in north of Iran, Mazandaran Province. It runs from 36°0'30" To 36°22'20" northern latitude and from 53°27'25" To 53°3'18" eastern longitude. The area of drainage basin is 708.08(km2). The most of drainage basin area has been covered from forested lands. The annual mean temperature of the terrain in 12.5 °c and the annual mean precipitation is estimated 696.7 ( mm). The area climate from Dommartan method is humid (5). From geological poit of view, the most of geologic units are related to senozoaek era that for the reason of the existance of marl, sheil and silty stones are susceptible to landslide occurrence (4).