Investigation of depositional formation of Sareyin tourist town site emphasizing topography, tectonic and climate to develop optimal urban land use

Extended abstract1- IntroductionUsually urban areas with rapid growth and horizontal developing are occupying unsuitable topography lands with high geomorphologic hazards. Recently, most cities due to physical limitations on urban development encountered with in subject of physical developing (Garklou et al, 1390: 99). In other hand, urban development often caused industrial and technological crises and increases vulnerability of the city, due to the building, financial and citizen’s density (Asgari et al, 2008:36-37).Therefore, knowledge of the characteristics of urban environment is the important subject in urban planning and urban management. Irregular development of the urban has a destructive effect on natural landscape and on the fringe agricultural lands (Batisani and Yarnal, 2008:2). So to optimal site urban selection is trying considered effects of various parameters (Zhao, 2010: 246), Sareyin tourist town are located in the eastern mountain slopes at elevations between 1640 to 1740 meters and 16 kilometers east slope of Sabalan on the fault Valley in the city of Ardabil. Due to importance tourist importance in the past two decades has intensified the city's physical development. Therefore the importance of this research in the subjects of geomorphology and environmental hazards are identified for more appropriate land use.2- MethodologyAccording to the nature of this research, this study was done as form as, field work such as studying on the surface formation, sampling the surface depositional formation In order to determining, granolometry (Texture and structure), Plastic limit, and liquefaction of themes.Moreover, from geologic map of study area, the type of formations, Layer slope, thickness and tectonic situation of them in the city site formation (on the foundation trenches, the local log) are determined. Also, with using ArcGIS, we drowned the map of slop, litology, heights, and faults and derange system. Then with combining these layers, final environmental hazard zonation map is drowned, In addition to the diagrams were drowned in Excel software.3 –Dissuasion At the current site of the Sareyin city two active faults with the trend of East - West and North -south is detectable. Volcanic Sabalan altitude with hydrothermal stage (which also is active in terms of tectonic) is located in the East of the city. Investigation surface soil formation showed that the soils are shallow area of low gradient areas (in slope range 3 to 5%) of heavy texture (with 45/51 clay texture) is (Table 1). However, most of the city site in the fault valley and