A wind tunnel experiment to explore the feasibility of using beryllium-7 measurements to estimate soil loss by wind erosion
A wind tunnel experiment to explore the feasibility of using beryllium-7 measurements to estimate soil loss by wind erosion
复制标题
风洞实验探索使用铍 7 测量来估计风蚀造成的土壤流失的可行性
DOI：
10.1016/j.gca.2013.03.033
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发表时间：
2013-08
影响因子：
5
通讯作者：
Zhang, Bo
中科院分区：
文献类型：
--
作者：
Walling, Des E.;Sun, Xi-Jun;Zhang, Feng-Bao;Zhang, Bo
以黄土高原水蚀风蚀交错带的桑迪黄土为研究对象，通过风洞试验，探讨了利用7 Be测量值估算风蚀流失量的可行性。风侵蚀有选择地去除土壤中较细的颗粒。使用的程序来估计土壤流失从7 Be测量开发的水蚀，不考虑这种选择性去除的罚款，因此可能会导致高估的土壤流失量，通过风蚀，因为7 Be优先与土壤的较细的部分。实验的结果，在研究区的两个现场进行的测量补充证明了一个定义良好的权力之间的函数关系Se/SO和ABe（其中Se是在侵蚀现场的土壤比表面积，SO是SSA的原始土壤和ABe是在侵蚀现场剩余的7 Be活动），与指数为1.075。本文提出了一个以（Se/So）0.75为基础的粒径修正因子P′，可用于由7 Be测量值估算土壤风蚀量的方法。用改进后的方法估算的土壤流失量与实测值吻合较好。使用7 Be测量值估算土壤流失量而不考虑颗粒尺寸校正因子P′，导致土壤流失量高估了1.14%。当P′被纳入时，高估被降低到1.2%。
Sandy loess from the Wind–Water Erosion Crisscross Region on the Loess Plateau of China, an area with severe wind erosion, was collected for use in a wind tunnel experiment, to explore the feasibility of using7Be measurements to estimate the amount of soil lost through wind erosion. Wind erosion selectively removes the finer particles of soil. Use of procedures for estimating soil loss from7Be measurements developed for water erosion, which do not take account of this selective removal of fines, is therefore likely to result in overestimation of the amount of soil lost through wind erosion, because7Be is preferentially associated with the finer fractions of the soil. The results of the experiment, supplemented by measurements undertaken on two field plots in the study region demonstrated a well-defined power function relationship between Se/Soand ABe(where Seis the specific surface area of the soil at the eroded site; Sois the SSA of the original soil and ABeis the7Be activity remaining at the eroded site), with an exponent of ∼0.75. It is proposed that a particle size correction factor P′, based on the term (Se/So)0.75, can be incorporated into the procedure for estimating soil loss by wind erosion from7Be measurements. The estimates of soil loss obtained using the refined procedure were in close agreement with the measured values. Use of the7Be measurements to estimate soil loss without incorporating the particle size correction factor P′ resulted in over-estimation of the soil loss by ∼14%. When P′ was incorporated, the overestimation was reduced to ∼2%.
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影响因子：
6.2
作者：
A. Chappell;A. Warren
通讯作者：
A. Chappell;A. Warren
影响因子：
1.6
作者：
Zhang, Fengbao;Yang, Mingyi;Zhang, Bo
通讯作者：
Zhang, Bo
DOI：
--
发表时间：
2011
期刊：
Journal of Sediment Research
影响因子：
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作者：
Wang Guangqian
通讯作者：
Wang Guangqian
DOI：
--
发表时间：
2003
期刊：
Journal of Desert Research
影响因子：
--
作者：
Y. Ping
通讯作者：
Y. Ping
影响因子：
2.4
作者：
P. Schuller;A. Iroumé;D. Walling;Héctor B Mancilla;A. Castillo;R. E. Trumper
通讯作者：
P. Schuller;A. Iroumé;D. Walling;Héctor B Mancilla;A. Castillo;R. E. Trumper