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The map of the valley floor width to valley height ratio (the Vf index) and four samples of V-shaped valleys in the study area. (a) The locations of the crosssections for Vf calculations; (b) The Vf diagrams related to the four cross-sections in subbasins 71, 75, 92, and 128.
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In this study, the analytical hierarchy process (AHP) was used to enhance the accuracy of the results obtained from the geomorphic analysis of tectonic activity. For this purpose, the relative tectonic activity index was computed by applying different and specific weights to each index based on the general geological and structural conditions of th...
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... et al. (1977), the valley floor width to valley height ratio (the Vf index) between tectonically active and inactive mountain fronts differs significantly since a valley floor is narrowed due to rapid stream downcutting. Thus, this index is sensitive to tectonic uplift. The results of the calculations of the Vf index and profiles are presented in Fig. 6. Generally, the Vf index values are low in the study area which correspond to the V-shaped valleys in the central parts of the study area. Higher Vf values are concentrated along the southern borders. This result is compatible with the thrust faults in Kuh-e-Sarhangi. However, the majority of the Vf values are less than 1. ...
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... the majority of the Vf values are less than 1. Consequently, most valleys are associated with linear and active downcutting streams which are characteristic of areas subjected to active uplift. By drawing the profiles of several valleys in the study area, the range of the Vf index was obtained between 0.40 (in basin 92) and 1.80 (in basin 66) (Fig. 6). The results of this index show that the highest Vf values are located in the Zeber-Kuh Fault and its fault strands as well as in the main fault of Kuh-e-Sarhangi. Several samples of the valley profiles measured in the study area are shown in Fig. ...
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... area, the range of the Vf index was obtained between 0.40 (in basin 92) and 1.80 (in basin 66) (Fig. 6). The results of this index show that the highest Vf values are located in the Zeber-Kuh Fault and its fault strands as well as in the main fault of Kuh-e-Sarhangi. Several samples of the valley profiles measured in the study area are shown in Fig. ...
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... the Bs index show that most of the elongated basins are located on the ZeberKuh and Kuh-e-Sarhangi faults and the western and southern basins of Kuh-e-Kabki (Fig. 4). The values of the Vf index in the study area indicate the high tectonic activity of the study area with a high uplift rate which caused these valleys to be cut and deepened (Fig. 6). The relative active tectonic values also indicate very high and high tectonic activity along the Kuh-e-Sarhangi Fault and high tectonic activity in the northern basins of the Zeber-Kuh Fault and in the northeastern anticlines of Kuh-e-Delkan (Fig. 10g). Based on the classification of the Iat index in the study area, the Kuh-e-Sarhangi ...
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