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本研究利用定位土芯Eu(europium)示踪新方法,研究黄土坡地不同利用方式下土壤侵蚀的时空分布规律。结果表明,该方法对以片蚀和细沟侵蚀为主的黄土坡地是适用的;土壤侵蚀的时间分布与降雨量的年时间分布相一致,过程性暴雨期表现为全年土壤侵蚀的高峰期;在复合坡面,随坡面的陡、缓、凹,土壤侵蚀表现强、弱、沉积;相同坡度和坡长条件下,幼龄核桃园的土壤侵蚀速率>刺槐林地>荒草地>苜蓿地。
In this study, a new method of Eu (Europium) tracing is applied to study the spatial and temporal distribution of soil erosion under different land use patterns. The results show that this method is suitable for loess slopes with erosion and rill erosion. The time distribution of soil erosion is consistent with the annual distribution of rainfall, and the peak period of soil erosion during the process of rainstorm On the composite slope, the soil erosion showed strong, weak and sediment with the slope steep, slow and concave under the same slope and slope length. The soil erosion rate of young walnut was> Robinia pseudoacacia> .