A Review on Landslide Effective Factors in Iranian Forest Habitats

In Iran, natural conditions for creating a wide range of landslide are possible regarding to the severe rugged, mountainous areas, high tectonic and seismic activity, and various conditions of geologic and climatic. This subject imposes the annual loss of life and huge economic losses to the country. Factors affecting landslides are also different so the extent of the difference among watersheds as well as vegetation and rainfall are different in each region of forest habitat. Researchers studies based on forest habitat showed that the effective factors on land slide are including more human factors than natural ones, i.e. land use change and establishment of infrastructures such as roads, dams, gas and oil lines and so on that could be managed technically. Human factors had majority of landslides occurred in a way that directly or indirectly impact on natural factors play an important role. In addition, reducing the country's forests because of the lack of integrated management plans in the country has been influential in increasing the landslides occurrence. So, the study on stability of slopes is necessary to build new infrastructure in the each forest habitat.