Recognize and Compare the of Iran's Deserts from the Aspect of Geomorphology and Climatology (case study: Iran's east and central areas desert)

Determine the desert area needs to achieve the information from natural environment parameters. That their interactions are jointly involved in genesis the desert features. The aim of this research is to recognize and isolate the desert regions of central and east of Iran in the view of geomorphology and climatology. For this purpose after preparing the information layers, the desert introductions index determined in the under study region of geomorphology and climatology. So that in the geomorphology factor, faces of representing desert including sand dunes and sandy plains, sand domes, pan salt, deserts and…and in the climatic factor the rainfall, temperature and annual evaporation, irregularity, coefficient of precipitation, changes and daily precipitation average intensity identified and separated. After that with using geographical information system (GIS), each of the mentioned factors drew and in the next step variables by AHP model were valued. And after that in the GIS were combined. And finally the map of throughout the climatic and geomorphologic deserts of east and central Iran prepared. The results showed that in terms of climatic, the under study region was divided to 4 climatologic areas which the desert region area of under study land from the aspect of climate is 74925.04km, equivalent to 20 percent and in terms of geomorphology 203773 equivalent to 54.4 percent. Conformity height, slopes and slope direction with the geomorphologic and climatic deserts maps, suggest severe impact of height factor than latitude in local wide variations of climate factor and the impact of these elements on specification and forms of dry and semi dry regions and developing the deserts regions area. According to the climate deserts map, implantation of dry and semi dry areas in locations which face with the desert and semi desert is evidence to regional climate affected the topography conditions of east and half central Iran.