Land slide survey by using indicators of morphotectonic

Landslide with Morphotectonic indices is related. Morphotectonic indices applicable tools for probability estimation and seismic planning of area. Landslides events are the most common natural threats that have been recorded in the Iran. Landslide hazard zonation planning is required for the sustainable management plan. Therefore، application of morphotectonic indices to estimate landslide risk in the selected areawas the aim of this research. The selected area comprises seven sub catchments at the south west of Iran which historically has experienced several earthquakes ranging between 2. 5 to 6. 5 magnitudes in the Richter scale. Morphological indices such as river length–gradient index (SL)، the catchment، drainage basin asymmetry (AF)، transverse topographic symmetry (TP)، factor hypsometric integral (HI) and index of drainage basin shape (BS) were applied for seismic planning of study area. As a result، different indices were converted to the tectonic activity index (IAT) in the three categories. Besides، the resultant morphotectonic zoning map was compared with landslide risk event، and calculated showed that a good correlation between morphotectonic indices and landslide risk event map was demonstrated in this study.