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土壤水力侵蚀兼重力侵蚀是本研究区的主要土壤侵蚀类型。通过对水力、重力侵蚀以及它们交替、复合侵蚀过程的分析表明:(1)土壤水力、重力侵蚀的直接表现形式即面蚀、沟浊、滑坡、崩塌、泥石流等侵蚀形态,对山区社会经济及资源环境具有不同程度的破坏能力,故称之为山地致灾因子;(2)水力侵蚀与重力侵蚀在时间上的交替混合,在空间上的复合叠加,既增强了诸种致灾因子自身的致灾能力,又助长了致灾因子彼此间的诱发或转化作用,进而形成与发展了山地致灾因子链;(3)土壤侵蚀是一综合性的山地致灾因子系列,各类致灾因子链对承灾体的连续性破坏,导致社会经济损失累积值增大。
Soil erosion and gravity erosion are the main types of soil erosion in this study area. Through the analysis of hydraulic and gravity erosion and their alternation, the composite erosion process shows that: (1) The direct manifestation of soil hydraulic and gravity erosion is the erosion form of surface erosion, ditching, landslide, collapse and debris flow, Resources and environment have different degrees of destructive capacity, so it is called mountain disaster factor; (2) The alternating mixture of water erosion and gravity erosion in time, in the spatial composite superimposition, not only enhances the various hazard factors Disaster-causing ability, but also contributed to the inducing or transforming effects of the disaster-causing factors, and then formed and developed a mountain chain of disaster-affected elements. (3) Soil erosion is a comprehensive series of mountain disaster- The continuous destruction of the disaster-bearing body caused by the chain leads to the increase of the cumulative value of social and economic losses.