Tracing sediment dynamics and sources in eroding rills with rare earth elements
文献类型：期刊论文
| 作者 | Lei TW ; Zhang QW ; Zhao J |
| 刊名 | : EUROPEAN JOURNAL OF SOIL SCIENCE
 |
| 出版日期 | 2006 |
| 卷号 | 57期号:3页码:287-294 |
| 关键词 | SOIL-EROSION CESIUM-137 MEASUREMENTS DETACHMENT RATES AGGREGATION EVOLUTION TRACERS OXIDES FLOW |
| 通讯作者 | Lei, TW |
| 英文摘要 | Eroding rills evolve morphologically in time and space. Most current studies on rill erosion use spatially averaged soil erosion data, providing little information on soil erosion dynamics. A method is proposed to use rare earth elements (REEs) to trace sediment distribution in eroding rills. Laboratory flume simulation experiments were conducted at three flow rates (2, 4 and 8 litres minute(-1)) and five slope gradients (5, 10, 15, 20 and 25 degrees) with three replicates of each treatment. The rills, of 8 m length, were subdivided into 10 equal segments of 0.8 m length and 0.1 m width, with a different REE applied to each segment. We derived computational formulae for estimating the distribution of eroded amounts along the rills. The actual erosion distribution along rills was then estimated with the data from the experiments. The precision of the REEs for tracing rill erosion was analysed. The results showed that sediment concentration increased with rill length, but the increased rate (the slope of the curve) flattened gradually. Sediment yields increased with slope gradients and flow rates, but the slope gradients had a greater effect on sediment concentration than flow rates, and greater flow rates caused more rill erosion and soil loss under the same slope gradient. The results also demonstrated the feasibility of using REEs to trace the dynamic processes of rill erosion. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2012-06-15 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/4899]  |
| 专题 | 水土保持研究所_水保所知识产出(1956-2013) |
| 推荐引用方式 GB/T 7714 | Lei TW,Zhang QW,Zhao J. Tracing sediment dynamics and sources in eroding rills with rare earth elements[J]. : EUROPEAN JOURNAL OF SOIL SCIENCE,2006,57(3):287-294. |
| APA | Lei TW,Zhang QW,&Zhao J.(2006).Tracing sediment dynamics and sources in eroding rills with rare earth elements.: EUROPEAN JOURNAL OF SOIL SCIENCE,57(3),287-294. |
| MLA | Lei TW,et al."Tracing sediment dynamics and sources in eroding rills with rare earth elements".: EUROPEAN JOURNAL OF SOIL SCIENCE 57.3(2006):287-294. |
入库方式： OAI收割
来源：水土保持研究所
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