水土流失与地貌侵蚀

Water and Soil Loss and Geomorphology Erosion

物质的侵蚀- 搬运- 堆积是地貌发育的主要过程。水土流失目前主要是指第一阶段即地貌发育的侵蚀过程。地貌的侵蚀一般被分为两类:自然侵蚀和人为侵蚀,而人为侵蚀被认为是水土流失的主要原因。笔者认为,人类活动固然加剧了侵蚀过程的发生,但它是在自然侵蚀的基础上进行的,它是符合自然侵蚀规律的。在目前的社会条件下,水土流失的治理不仅仅是减少人类活动的影响,而应该是使人类活动在地貌演化过程中扮演因势利导的角色,使其向着人类有利的方向发展。

The erosion-transport-deposit of weathering sediment is one of the important process of geomorphology development.And water and soil loss is lied on the first stage,i.e.,the erosion process of geomorphology development.Generally,geomorphology erosion is divided into two types:natural erosion and man made(accelerated)erosion.Now the man made erosion is taken as the main factor that controls the water and soil erosion.We acknowledged that the human activity did strengthen the development of water and soil loss,but the man made erosion is on the base of the natural erosion,and it can’t be separated from natural erosion.Under the circumstance of current society,the control of water and soil loss shouldn’t only rely on decreasing human activity, but also make human activity play a guide action according to geomorphology evolution,and make the evolution favored to human’s sustainable development.