Comparison slide zones by Nilsen method with active tectonic zones produce of Smf index

Geophysics

Abstract

Slide zones under title erosion types related to more active tectonic factors for example stream length-gradient (Sl),ratio of valley-floor width to valley height (Vf), drainage basin shape (Bs), mountain front sinuosity (Smf), drainage basin asymmetry (Af) and hypsometric integral (Hi). This research is noticeable comparison produce slide zones by Nilsen. The active tectonic zones produce from Smf index under title one of the important active tectonic factors. Determination landform of geometry or morphometry factors is the one of best method for study and evaluation active tectonic. The first provided Dem maps in GIS software by topography, geology, tectonic maps participant with field activities. Then provided active tectonic map by Smf index into three class A, B, C and landslide hazard zonation map into five class stable zone, generally stable zone, stable moderately stable zone, moderately un-stable zone and talented to liquefaction zone. Comparison and conformity landslide hazard zonation map with hazard zonation into Smf index showed about percent 71(51120 hectare) moderately unstable zone and talented for liquefaction zone settled in A zone Smf map and percent 29 (20880 hectare) remained settled sequential percent 18 (12960 hectare) and percent 11 (7920 hectare) in B, C zone of hazard zonation active tectonic produce from Smf index. In other word in research showed relationship landslide zones produce landslide hazard zonation by Nilsen to active tectonic zones by Smf index in the study region.