بررسي و تحول كانال هاي گيسويي در سطح مخروط افكنه ها (مطالعه موردي : مخروط افكنه تنگوييه در چاله سيرجان )

Braided river is one, of the landforms that spread on alluvial fans. Assessment of evolution and formation of this landform is very important in arid regions, because of Probability of hazard in settlement area. Alluvial fans of Tangoeieh river is one of the largest fans in sirjan basine. The goal of this research is assessment of changes of braided river on the alluvial fans. For achieve to this objective, the aerial photos of two different time has used. In this research we have used from some software, such as Freehand, Microstation and Photoshop for compare the changes in two time. Evidence has showed that in short time the changes of braided rivers is result of flooding and yield of sediment and changes in long period of time is result of tectonic activity.