Assessment of Active Tectonic in Hable Roud and Kordan Basins using Geomorphic Indexes

Exploring active tectonics considering earthquake in different area is very important. These movements have effect on the earth and each one the effects is visible around us. This research aimed to analyze and compare the tectonic activities of two basins of Hable Roud and Kordan. In addition to field observations, 10m DEM, Landsat images, and softwares such as Arc GIS Global Mapper13 were applied to draw maps and analyze data. Applied indexes in this research were fan comicality index(FCI), width to valley height (Vf), drainage basin shape (BS), sinuosity of mountain fronts (Smf), index to assess basin asymmetry (T), drainage basin asymmetry (Af), river sinuosity index (S), and relative tectonic activity index (IAT). Through IAT, the whole outcome of tectonic activities by the above-mentioned indexes can be measured in tectonic regions. According to the IAT classification, both basins are active tectonically however the rate of tectonic activities in the Kordan basin is greater than in Hablerod basin. Active tectonic, according to IAT index in Kordan basin is assigned to class 1 and Hable Roud basin is assigned to class 2. According to IAT classification, new-tectogenesis activities is more in Kordan region rather than Hablerod region. Though this is a general conclusion, it emphasizes on the necessity of attention to morpho tectonic evidence. It also shows that such studies must be performed in all southern basins of Alborz Mountain and be compared with one another to have better understanding. The ideal research is the outcome of an applicable look on morpho tectonic indexes and morpho tectonic evidences via new methods as well.