Impact of Root Distribution Characteristics on the Overturning Resistance of Leucaena leucocephala Forest in Debris-Flow Accumulation Area, Dawazi Gully, Yunnan, China

Tree resistance to overturning is crucial in forestry hazard applications and management. anchorage varies considerably with species, tree age, site conditions. We investigate the relationship between root characteristics of slip surface role roots (regarding different diameters overturning). Four Leucaena leucocephala were fully excavated by a quadrate monolith establish distribution characteristics, 19 L. uprooted until trees completely overturned measure anchoring overturning. A model was developed improve descriptions mechanical processes for The results show that system well described model. For root–soil plate radius, thickest diameter biomass at increased breast height. affected strength surface; density may be key factor identifying location surface. could predict moment most trees; although it overestimated small height trees, will useful understanding influence