Effects of Morphotectonic in Longitudinal Profile of Vaz Stream, Northen Alborz, Mazandaran Province

The river is sensitive to tectonic movement. There are close relationship between the fluvial landform and tectonic movement. Geomorphic indices are indicators capable to detect landform responses to recent deformation processes and therefore have been broadly used as a recognition tool to characterize sectors deformed by active faults. Some geomorphic indices such as hypsometric integral (Hi), drainage basin asymmetry (Af), ratio of valley floor width to valley height (Vf), stream length–gradient index (SL), transverse topographic symmetry factor (T) and basin drainage shape (Bs) have been used extensively to detect tectonic activity at different places around the world. The Vaz watershed is located in the northeastern Alborz, Mazandaran province and county of Nour. Vaz watershed geologically consists of marine and continental sequences, which deposited through the Msozoic to Cenozoic. Several faults system such as North Alborz fault (mangol) and Kelerd fault have been defined in Vaz watershed.