earticle

영어

Shallow landslides commonly occur at the soil depth of 0.5-2 m of forested mountain slopes. Tree roots have been recognized to develop to this soil depth; thus, they improve the shear strength in the soils on the surface of sliding. The effects of tree root reinforcement on the soil layer increase the slope stability. The function of tree roots is important because most of the sediment-related disasters in South Korea are mostly caused by shallow landslides on forested mountain areas with shallow soil depth of 0.5-1 m. There were several methods for estimating the shear strength of forested mountain areas, such as measuring the tensile resistance of tree roots and using cohesion values in soils of forest and bare land for calculating the root cohesion. In this study, we applied the soil cohesion provided by roots through field survey on the forested mountain slopes in the locality of Mt. Daeryong to the shallow landslide stability (SHALSTAB) model. As a result, we could predict the source areas of sediment-related disasters according to rainfall conditions.