期刊文献+

稀土元素示踪坡面冲刷侵蚀过程的室内模拟试验研究 被引量:5

Simulation Experimental Study of Soil Erosion Process of Slope Scouring with Rare Earth Elements Tracer
下载PDF
导出
摘要 为确定坡面侵蚀产沙的时空演变规律,通过沿坡面垂直分段和分层结合布设不同稀土元素,采用室内放水冲刷试验系统,分析了各坡段侵蚀产沙量和侵蚀率变化过程。结果表明:坡面侵蚀产沙可分为3个阶段:面蚀阶段、沟蚀阶段和沟蚀稳定阶段。试验结束时,上坡段土壤总侵蚀量为17.527 kg,占坡面总侵蚀量的89.2%,其中La和Eu示踪区的侵蚀量各占坡面总侵蚀量的48.1%和23.8%。La,Eu,Yb,Tb,Ce,Nd和Sm 7个示踪区的累积侵蚀量之比为:1∶0.495∶0.184∶0.177∶0.146∶0.030∶0.074,坡面上段、中段和下段累积侵蚀量之比为:1∶0.095∶0.040。试验过程中,上坡段细沟蚀剧烈,中坡段主要以面蚀为主,伴有轻微沟蚀,而下坡段始终以面蚀存在。 In order to definite the temporal and spatial process of soil loss on loess slope surface, the erosion sediment yield and erosion acceleration on different section of sloping land was analysed systematically by placing different rare earth elements into different soil depth and different section across a slope, using the runoff scouring method. The results indicated that the process of sediment yield on slope were divided into three stages: surface erosion stage, interrill erosion stage and rill erosion stability stage. At the end of the experiment, the accumulated erosion of upper slope was 17.527 kg, which accounted 89.2% of total erosion sediment yield of slope, and the total erosion sediment yield of La and Eu tracing areas accounted 41.8% and 23.8% of total erosion sediment yield of slope respectively. The ratios of accumulated erosion of La, Eu, Yb, Tb, Ce, Nd and Sm tracing area were 1:0.495:0. 184:0. 177:0. 146:0.030:0.074. The ratios of accumulated erosion of the upper, middle and lower of slope was 1 : 0. 095 : 0. 040. During the whole process of experiment, the rill eroded intensively in the upper part of slope. With slight rill erosion, the surface erosion was a main erosive way in the middle part of slope, and the surface erosion existed during the whole process in the lower part of slope.
出处 《中国稀土学报》 CAS CSCD 北大核心 2008年第4期510-515,共6页 Journal of the Chinese Society of Rare Earths
基金 国家自然科学基金资助项目(40371075) 辽宁省自然科学基金(20062110)资助项目
关键词 稀土元素示踪法 坡面冲刷 侵蚀率 稀土 REE tracer method slope scouring erosion rate rare earths
  • 相关文献

参考文献11

二级参考文献33

  • 1周佩华.黄土高原的侵蚀沟及其摄影量方法[J].水土保持通报,1984,4(5).
  • 2承继成.坡地流水作用的分带性[A]..中国地理学会1963年学会论文集[C].北京:科学出版社,1963..
  • 3蔡强国 等.黄土坡耕地上坡长对径流侵蚀产沙过程的影响[A]..水土流失规律与坡地改良利用[C].北京:环境科学出版社,1995.50-58.
  • 4朱显谟.黄土高原流水侵蚀的主要类型及有关因素[J].水土保持通报,1982,(1).
  • 5陈浩.上坡来水在坡面产沙中的作用[A]..水土保持科学理论与实践:第二次全国水土保持学术讨论会论文集[C].林业出版社,1992.75-87.
  • 6张信宝.137Cs法测定梁峁坡农耕地土壤侵蚀初探 [J].水土保持通报,1988,5:23-23.
  • 7郑粉莉,水土保持学报,1987年,1卷,1期,36页
  • 8郑粉莉,中国水土保持,1987年,11期,38页
  • 9团体著者,黄土高原杏子河流域自然资源与水土保持,1986年
  • 10唐克丽,水土保持通报,1984年,5期,10页

共引文献210

同被引文献68

引证文献5

二级引证文献43

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部