Investigation of active tectonic indices in Noorabad Fars catchment

Document Type : Original Article





Parts of the earth's crust now have tectonic movements and will be prone to danger in the future. Therefore, geomorphological forms are very sensitive to tectonic activities and change as a result of these movements. Evaluation of tectonic activities using some quantitative indicators , Plays an important role in recognizing these activities and helps to interpret the tectonic status of the areas. Passage of Kazerun fault from the middle part of Nurabad basin has an effective role in tectonic activity in this region. Undoubtedly, new construction activities in the region, along with other influential factors (uncontrolled abstraction of groundwater reserves, drought, etc.) can be one of the main causes of water loss in the region. For this purpose and with the aim of evaluating the tectonic activities of the region, some of the geomorphic indices such as basin shape index (BS), drainage basin asymmetry index (AF), inverse topographic symmetry index (T), mountain front sinusoidal index (J), hepatic integral (Hi), valley floor-to-height index (VF), river sinusoidality index (S), longitudinal river gradient index (SL), relative evaluation of tectonic activities (Iat) and hierarchical anomaly index (Δa) have been used. . The results of geomorphological indices show that the whole basin is dynamic in terms of tectonic activities. The study of the tectonic status is in accordance with the active Kazerun fault.