blocking role in geomorphodynamic hazards events (Case study landslide West Bakhtiari Province in date 1377 Farvardin)

Introduction Hazards are an integral part of human societies. That several factors contribute to its occurrence. The blocking a phenomenon that affects most of the other parameters particularly. Landslide hazards are considered as important Iranian morph climatic hazards that every year brings a lot of damage to different areas. In Farvardin 1377 after a period of 19 days of rain in the North West and West Bakhtiari province The landslide occurred that Lebd Abikar was that most of rock avalanches.and Was destroyed and its inhabitants. Therefore, it seems necessary to identify assessment and forecast ahead of time and change events in the watershed to reduce damages to the human community. The purpose of this study is to investigate the role of climatic factors, especially blockingl synoptic patterns and the hazard of geomorphodynamic as a guide to predict the functional. 2- Methodology The general approach is based on synoptic analysis based on the outputs of the Grads software and matching with the data recorded in the land stations Analytical methods – Numerical by using Statistical and geostatistical software GIS and Excel (Figure 1). Figure 2 - Diagram of research 3– Discussion In this regard, we have tried to consider the casual attitude, how blocking and their effects through analysis of synoptic maps In two periods rainy and between rain Leading to landslides in West Bakhtiari province. Then investigated the changes in precipitation, temperature fluctuations, and how to process and melting snow caused landslides and rock avalanches using Koohrang synoptic station data were compared with long term averages. 4– Conclusion blocking important role in the occurrence of synoptic patterns and geodynamic phenomena Abikar rock avalanches and landslides in the manner and type of precipitation and Have a role in determining the performance of system pressure, cold and warm fronts rotate the location and the type and location of each interval in the range of precipitation blocking First, the interval between rainfall and the rainfall ranges (Figure 2). Figure 2 - Hydroclimatic behavior rainfall during the 19-day