Quantitative measurements have allowed geomorphologists to objectively compare landforms and calculate geomorphic indices that for identifying a particular characteristic of the area; for example, its level of tectonic activity.The indices; the hypsometric curve (Hc) and hypsometric integral (Hi) are related to the degree of dissection of a landscape. Drainage-basin asymmetry is defined in terms of the Asymmetry Factor (AF) as well as the transverse Topography symmetry Factor (T). Both of these are valuable in rapid evaluation of drainage basin to determine if tectonic tilt may have been occurred. The stream length-gradient index (SL) is a useful tool for studying tectonic geomorphology; high values commonly are originated where stream cross resistant rock or where stream cross active structure. Mountain-front sinuosity (Smf) is an index that reflects the balance between erosion forces and tectonics forces at a mountain front. In general, active mountain fronts have relatively low values of sinuosity. The ratio of valley-floor with to valley height (VF) differentiates between broad floored canyons and V-shaped valleys. Low values of VF are associated with active tectonic.In this article seven indices of relative tectonic activity are used and evaluated for studying and analysis dynamic sequential process in earth shaping plus landscape and is used to classify darakeh basin for relative tectonic activity. Commonly, it is useful to classify area as being very active, moderately active, or in active. Such basic classification is useful in delineating area where more detailed field studies will identify active structure and calculate rate of active tectonic processes. Processing Geomorphic Indices of Active Tectonics in Darakeh Basin indicate that this basin is being a tectonic active region in Iran. Finally; darakeh basin is classified to the stream length-gradient index (SL)
Keyword: Tectonic geomorphology, Darakeh, Geomorphic Indices, Tehran Thrust
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