Study of tectonic activity in the Latian dam basin using morphotectonic indicators

Document Type : Research

Authors

1 Semnan University

2 University of Tehran

10.22092/wmej.2015.107089

Abstract

Latian dam basin is one of the mountainous basins located in the North East of Tehran. Existence of two main fault systems including Mosha-Fasham with170 kilometers length and north Tehran fault with length of 75 km, also numerous minor faults, indicating the emergence of major tectonic events in this region. Therefore, the aim of this study is to investigate the status of neotectonics in the basin using geomorphological indicators. To achieve this goal, seven geomorphological indicators Drainage Asymmetry Factor (AF), Ratio of Valley- Floor with to Valley Height (VF), Basin Shape Factor (Bs), Transverse Topographic Symmetric Factor (T), Hypsometric Integral (Hc), River Sinuosity (S) and Stream Length- Gradient Index (SL) were used as research tools. The data used in the evaluation of geomorphological indicators were topographic maps, geological maps and radar images. The analysis of the data and the maps preparation were done using GIS and ArcGis9.3 software. The results indicate that the basin is active neotectonically, but the activity is not the same everywhere and upstream areas are more active.

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History

  • Receive Date: 27 April 2013
  • Revise Date: 18 January 2015
  • Accept Date: 19 February 2015

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