摘要
通过对黄土高塬沟壑区不同土地利用情况下土壤侵蚀的137Cs法研究,发现从坡顶到坡脚,土壤剖面的137Cs含量呈现强、弱交替的波动变化。通过对土壤侵蚀波动性的分析以及与其他研究成果的对比分析,发现随着坡长的增加,土壤侵蚀在坡面上总是呈现出一定的波动性,并由坡面细沟侵蚀的变化规律所决定。坡面土壤侵蚀的波动性可分为2种类型:一种是受人类活动影响较大的耕作型;另一种是受人类活动影响较少的自然型。
^(137)Cs inventory fluctuations along the loess slopes under different land use in the Nanxiaohegou gully watershed of Xifeng are shown. By analysis of the fluctuations and of the results of erosion fluctuations on slopes from other studies, it is concluded that soil erosion intensity always fluctuates as slop length increases on loess slopes because of rill erosion variations along slopes. Soil erosion fluctuations on loess slopes can be divided into two types, cultivated slopes under strong influences of human activities and uncultivated slopes with little influences.
出处
《中国水土保持科学》
CSCD
2005年第2期28-31,共4页
Science of Soil and Water Conservation
