花岗岩风化壳的崩岗侵蚀,是华南地区土壤侵蚀最严重的类型,侵蚀严重阶段年平均侵蚀模数可达20～30万tkm~2。本文介绍了有助于崩岗地形发育的两个特性,论述了崩岗地形形成与土壤侵蚀过程、沟形沟系与侵蚀类型的关系,将崩岗侵蚀过程分为深切期、崩塌期、夷平期三个阶段,并阐明了各侵蚀阶段的特征。 Collapse erosion of granite weathering crust is the most serious type of soil erosion in South China. The annual average erosion modulus of granite weathering crust can reach 200,000 ~ 300,000 tkm ~ 2. This paper introduces two characteristics that are helpful to the development of the disastrous topography, discusses the relationship between the disintegration topography and the soil erosion process, the ditch type and the erosion type, divides the collapse process into deep period, collapse period, The three phases of the cycle, and clarify the characteristics of the erosion phase.