衡山花岗岩地貌过程与水土流失关系的研究

Relationship between granite geomorphic process and soil erosion of Hengshan Mountain

通过对衡山地貌和侵蚀过程分析,发现地貌是影响土壤侵蚀的基本因素,古代侵蚀地貌是现代地貌过程的基础,也决定着现代土壤侵蚀发展的规律。人类活动不能改变这种规律,却可影响土壤侵蚀的进程,土壤侵蚀加速了现代地貌过程,现代地貌过程的加速又强烈地影响土壤侵蚀程度和方式。用长时间尺度,区分古代侵蚀与现代侵蚀、正常侵蚀与加速侵蚀,将更有利于监控现代地貌过程,实施合理的水土保持措施,防止加速侵蚀,减缓现代侵蚀进程,从而保护环境和风景名胜区。

The analysis of geomorphic and erosion process of Hengshan Mountain shows that the topographic feature is the basic factor impacting on soil erosion. Antiquity erosion topographic feature is the base of current topographic course, and decides the developing law of current soil erosion. Human activity cannot transform this law, but can affect the progress of soil erosion, and soil erosion can make the current geomorphic course accelerate. This acceleration reacts soil erosion intensity and pattern. Distinction from the antiquity and current soil erosion, normal and accelerating soil erosion using long time dimension will be beneficial to supervise the current geomorphic process and adopt more justified methods of soil reservation, to prevent accelerating soil erosion and retard current soil erosion process, then protect environment and scenery.