黄土侵蚀机理探讨

Discussion on Mechanism of Loess Erosion

以黄土高原为例，分析了黄土抗冲性和坡面径流，并根据多年野外调查资料，探讨了黄士侵蚀机理。针对黄土抗冲性极其微弱，黄土高原的年径流深并不大，以及严重的土壤侵蚀由少数几次大暴雨所引起等情况．提出了黄士高原的水土保持应以调控大暴雨所产生的地表径流为指导思想。

The loess anti-scourability and slope surface runoff are analyzed,for the Loess Plateau as an example. On the basis of the field investigation for many years f the mechanism of loess erosion has been discussed. Dealted with the extremely weak situation of loess anti-scourability, the unlarge deapth of annual runoff and severe soil erosion caused by several times of heavy rainfall. It is put forward that, on the Loess Plateau, the ideology guilding of soil and water conservation should be regulating runoff caused by heavy rainfall.