Morphotectonics investigations of the Garehbagh basin area based on morphometric indices, NW Iran

Morphotectonic investigations were carried out by the use of morphometric indices which serve as a tool of identification in regions with active tectonic warp. Landforms in active deformation area are produced from relations of tectonic and surficial processes. One of the most significant landforms underground is rivers that are extremely responsive to tectonic movements mainly uplift and tilting. Accordingly, based on investigation of the rivers and interrelated drainage networks by the use of morphometric indices, we will be able to achieve valuable information about tectonic record of the study area. In this study, in order to find out the tectonic activities of the study area, geomorphic indices were surveyed in Garehbagh basin. In order to determine tectonic movement of Garehbagh basin area, six different morphometric indices including Mountain Front Sinuosity (Smf), Valley Floor Width to Height Ratio (Vf), Index of drainage basin shape (Bs), Stream Length Gradient Index (Sl), Hypsometric integral (Hi), Drainage basin asymmetry (Af) were applied to the study area. According to generated results, SL values change between Smf value according to generated outcome; the most active mountain fronts faults of the study area.. Deep and narrow valleys show low Vf values