Abstract
Article history: Received March 25, 2011 Received in Revised form June, 27, 2011 Accepted 28 June 2011 Available online 28 June 2011 Tectonic geomorphology can be explained as the study of landforms produced by tectonic processes, or the application of geomorphic principles to the suggestion of tectonic problems. Tigrani's watershed is located in north part of hillside. Nayband Fault sub branch pass from the east of zone and kuhbanan fault from the north of zone supplies an appropriate theme for survey tectonic activities. For access to this aim geomorphic indexes contain Stream Length Gradient, Drainage Basin Shape Ratio, Ratio of Valley-floor with to Valley Height, Topographic Symmetry, Mountain Front Sinuosity and Asymmetry Factor with use of topographic maps, DEM, Arc GIS and Global mapper softwares have gained. The results of research which calculated with Iat index show west sub basin have medium tectonic activity (Iat=2), and east sub basin have high tectonic activity(Iat=1.5). Overall the results show that assessment of tectonic activities in Tigrani watershed this basin is active because of tectonic movements. © 2011 Growing Science Ltd. All rights reserved.
Highlights
Geomorphological analyses help us investigate on the modifications that affect hydrographic basins, modifications because of active tectonics, and the quantitative description of landforms
Since the calculation of stream length-gradient index (SL) is very sensitive to the changes of slopes in the river, it is possible to evaluate the relationship between tectonic activities, resistance of different units of stones and topography assessment
We have calculated different indexes to study tectonic activities of an active region of Tigrani located near the city of Kerman, Iran
Summary
Geomorphological analyses help us investigate on the modifications that affect hydrographic basins, modifications because of active tectonics, and the quantitative description of landforms. García-Meléndez et al (2003) studied the eastern portion of the Huercal-Overa Basin located in Spain and made the first investigation on reconstructing the long-term landscape development during the Plio-Quaternary They integrated some geological and geomorphological data through field observations and GIS and remote sensing techniques and provided a case study, which helps us understand the landscape development within tectonically active shear zones. Hamdouni et al (2008) presented a new technique for evaluating relative active tectonics based on geomorphic indices for evaluating morphology and topography such as stream length-gradient index (SL), drainage basin asymmetry (Af), hypsometric integral (Hi), ratio of valley-floor width to valley height (Vf), index of drainage basin shape (Bs), and index of mountain front sinuosity (Smf). Conclusion remarks are given in the last section to summarize the contribution of this paper
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