Using rare earth elements tomonitor sediment sources from aminiature model of a small watershed in the Three Gorges area of China
文献类型：期刊论文
| 作者 | Gang Liu1,2,3; Hai Xiao1; Puling Liu1; Qiong Zhang1; Jiaqiong Zhang1 |
| 刊名 | Catena
 |
| 出版日期 | 2016-04-14 |
| 期号 | 143页码:114-122 |
| 通讯作者邮箱 | gliu@foxmail.com |
| 关键词 | Purple soil Soil loss Runoff Gully erosion Landform |
| 通讯作者 | Gang Liu |
| 英文摘要 |
Understanding soil erosion processes at different landscape positions is important in order to predict and control
watershed soil losses. Rare earth elements (REEs) can be used to trace eroded soil sources but their efficacy may
be soil dependent. We constructed a miniature watershed model of a small watershed located in the Three
Gorges Area of China, and used oxides of eight REEs to trace the erosion of a purple soil. The miniaturewatershed
was divided into eight regions containing a different landform type as a potential sediment source. A different
REE was applied in each region. Redistributions of the REEs under three successive simulated rainfall events
with intensities of 1.0, 1.5 or 2.0 mm min−1 were examined. The percentage contribution from each region to
the total soil loss fromthewatershed fluctuated relative to landform type during the three rainstorms. Contributions
from the lower main gully decreased before stabilizing, while those from the upper main gully increased
before decreasing, and those from other sources all increased before stabilizing. Overall, the contribution of the
gully system, comprising main and branch gullies, was greater than that of the slopes. Contributions from the
gully system tended to decrease with increases in rainfall intensity and rainstorm duration while those from
the slopes increased. A comparison of the calculated and actual soil loss masses indicated that the accuracy of
the REE tracing method was less for the coarse textured purple soil than those previously found for fine textured
soils. The increased errors, likely due to the assumption used in the calculation that there is no particle size selectivity
during erosion, needs to be addressed. This pilot study provided a technical reference for the use of REEs in
monitoring sediment sources from a natural watershed, and a theoretical basis for soil conservation in the Three
Gorges Area. |
| 收录类别 | SCI |
| 原文出处 | http://ac.els-cdn.com/S0341816216301308/1-s2.0-S0341816216301308-main.pdf?_tid=ea50868e-48de-11e6-bbc6-00000aab0f27&acdnat=1468403473_7a8ed3ebc8de432cba790efd9fc8a374 |
| 语种 | 英语 |
| WOS记录号 | WOS:000376800800013 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/7747]  |
| 专题 | 水土保持研究所_水保所科研产出--SCI_2016--SCI |
| 作者单位 | 1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil andWater Conservation, Northwest A&F University, Yangling 712100, People's Republic of China 2.Institute of Soil and Water Conservation of Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, People's Republic of China 3.USDA-ARS National Sedimentation Laboratory, Oxford, MS 38655, USA |
| 推荐引用方式 GB/T 7714 | Gang Liu,Hai Xiao,Puling Liu,et al. Using rare earth elements tomonitor sediment sources from aminiature model of a small watershed in the Three Gorges area of China[J]. Catena,2016(143):114-122. |
| APA | Gang Liu,Hai Xiao,Puling Liu,Qiong Zhang,&Jiaqiong Zhang.(2016).Using rare earth elements tomonitor sediment sources from aminiature model of a small watershed in the Three Gorges area of China.Catena(143),114-122. |
| MLA | Gang Liu,et al."Using rare earth elements tomonitor sediment sources from aminiature model of a small watershed in the Three Gorges area of China".Catena .143(2016):114-122. |
入库方式： OAI收割
来源：水土保持研究所
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