Survey of Paleo hydro geomorphology transformations of Kuhdasht region

The basis of analysis of functional geomorphology is on systematic approach. Systematic geomorphology is to identify geomorphologic forms, processes, and relations between them. Efficiency of this approach is very important when there are interactions between components and elements of the system. The purposes of this study is to survey Paleo hydro geomorphology of Kuhdasht plain and its old lake and recognize structure and transformation of the lake in Quaternary, in this Plain according to systematic approach. studying in the field of how changes in temperature– humidity of Kuhdasht plain during the Quaternary and its effect on forming systems is one of the fundamental issues in studies of Paleo hydro geomorphology, Knowing of such relationships represent geomorphological characteristics of the region and the way of its changes. For this purpose, the geomorphological conditions of this region, citing reasons of Morphology, sedimentology, climatic evidence, reconstruct past climates and compared with the present climate was studied. The results show that the study area cold and wet periods during the Quaternary in terms of temperature, compared to nowadays, was about 9 degrees colder and that precipitation was about 245 mm more humid than today. So, water balance in the plain was positive. This factor has caused the Kuhdasht plain was considered as a lake in the past, and eventually led to the rupture of the lake in the result of water over flow. Relationship review between the lake and Civic Societies indicates that this region is considered as a natural open system and had been a direct Interconnection between the lake and the area’s herding systems.