Comparison of Effective Factors on Landslide Hazard in Two Spatial Scales through Multiple Regressions (Case Study: Taleghan Watershed)

Abstract:
Landslide occurs inevitably and naturally in many slopes due to sensitive formations, moisture, and other factors. Taleghan watershed is prone to landslide due to the presence of huge Miocene marl masses. After construction of Taleghan reservoir dam, moisture and ecological condition of the region changed. In this paper, factors impacting upon landslide hazard (slope, aspect, hypsometry, geology, land use, distance to road, distance to lake) were studied and their role and importance on this phenomenon were verified in a large (maximum distance of 1500 meter from lake) and a small (maximum distance of 450 meter from lake) spatial scale. Thus, GIS maps of the above mentioned parameters were provided using satellite and aerial images and field activities. All maps were crossed with a resolution of 100m*100m. It was found out that the distance to the lake didn’t influence upon landslide in a large spatial scale but it falls effective as the distance to the lake reduces. In fact lake has a local effect and mostly influences at maximum 200 meter distance.
Language:
Persian
Published:
Journal of Range and Watershed Management, Volume:69 Issue: 1, 2016
Page:
201
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