三趾马红土泻溜侵蚀规律研究

本文通过野外定位观测,对晋西黄土高原三趾马红土(N_2)的泻溜侵蚀规律进行了初步研究。研究表明:泻溜侵蚀是红土一种物理风化和搬移过程,其侵蚀作用一年四季都有发生,侵蚀强度干季大于湿李,高峰期多出现在冻融频繁的3～4月份;产生泻溜的地表坡度在40°～60°之间,每平方米泻溜面积上全年泻溜总量可达40～50kg;地面坡度、土壤含水量、冻融和风力等因素与泻溜侵蚀强度均有密切的关系。

Study on Erosion of Slumping in Sanzhim a Red Clay Area

The authors of this paper conducted preliminary studies on the law of erosion in form of slumping in Sanzhima Red Clay(N2 )on the loess plateau of Western Shanxi Province through field on-the-spot observation- The study indicates that slumping is a kind of process of physical weathering and transportation, which takes place in four seasons.The intensity of erosion in dry season is higher than that in wet season,especially in March and April when freeze thawing frequently occurs.The surface slope for slumping to occur is between 40 and 60 degrees and the total amount of earth slumped in a year weights 40-50 kg per square metre of slumping area.Factors such as surface slope, soil moisture, freeze thawing and wind force etc. are closely related to the intensity of erosion.