شواهد ژئومورفولوژيكي تغييرات سطح اساس در پلاياي حوض سلطان

Geomorphologic Evidences of Base Level Changes in Hoz-e-Soltan Playa

This paper explains the spatial variation of morphology and past and present climate, and catchment characteristics. This region is a part of large depression of Masileh (located in Qom province). Field observations during several weeks of surveys (in 2000 to 2007), topography & geology maps, climate data and available hydrologic records. Applied data has been based on survey on field and GIS data(by Arc Gis& ilwis). Identification of morphological features using remote sensing techniques is often a powerful tool for classifying and Level Fluctuation or for reconstructing the paleo-geomorphology. hence component analysis (PCA) were used. Remote sensing techniques offer rapid acquisition of data with a generally short turn-around time, at a cost lower than that of ground surveys (Hunt et al.,2003), and are a useful tool for delineating the fluctuating margins of shallow-water systems like the playa-lakes. Results showed that there was a specific relationship and correlation between neotectonic and climate change with segmented fans, river Channel change and Instability. These Playas (hoze sultan-hoze mare) have their origins in a combination of tectonics, climate change and aeolian forces. The size and shape of lakes varies through time in response to climate change and lake hydrologic changes. Also This results provide a strong foundation for understanding Geomorphologic evidences of base level change in playa Hoz-e-Soltan.