Zoning risk of slope instability in the mountainous semi-arid areas

Study the instability domain in order to harm the land and gardens, cities, roads and highways and other structures related to places easier to draw impose Is of enormous significance in the field of environmental planning in order to reduce the adverse Aszat them. The possibility of instability in mountainous areas due to the intensification of land use loose and public reception of countryside located in the area as well as tourist attractions, along with two formations Badrnzrdashtn Levels of some mountain areas, especially in the northern part of East Kshvrafzaysh, and may exacerbate the instabilities of range Lead to environmental hazards and catastrophism that every year, in addition to incurring financial losses of many lives dying also make Due to the geographic location of the study area in Khorasan Razavi Province, in the southwestern city of Mashhad, the middle section of northern Iran East is located in central Binalud . In this study, research, analytical and empirical and inductive teaching methods and feasibility of the domain instabilities and debris flows in the catchment area Jagharq In order to identify risk factors for these instabilities, and the impact of environmental hazards's performance, so in order to achieve goals Research, an experimental model Nblagan because of the availability of statistics and data related to variable and compliance factors in the risk of slope instability in The risk of slope instability in the study area was chosen. Using this model and taking into account the variable 6 Variable to assess risk factors, such as topographic factors - Geology - Land - River drainage network - fault - vegetation - And finally creating business units and maps zoning map of the basin in terms of the danger of instabilities in three zones of potential instability in the Domain A (low risk area І, ІІ area with medium risk and high risk area ІІІ) were detected. Given the significant area of the zone at high risk As well as other results of field surveys, including geological features of the region, the role of sex bedrock slopes in landslide Drnapaydaryhay range, especially in large measure is highly effective.