Study of Tectonic Activity in Young Eastern Alborz, Central Iran on the Basis of Alluvial Fans in the Shahrud-Bastam Area

Alluvial fans are grouped in buildings which can provide important evidence of tectonic and climatic changes [1], Shahrud-Bastam area as structure point is located between Eastern Alborz structural zones in the north and central Iran structural zone in the south. In this study, we have measured 16 indicators morphotectonic on 79 alluvial fans and 46 catchments, according to the results of the measurements of morphometric parameters of alluvial basins and watershed, we find out that Qods-Armiyan’s fault zone has the most of tectonic activity between Tazareh and Shahrud fault regions. According to the index As, the development of alluvial fans often has a direct relationship with Level rise, which has a particular importance in the study field.