Effects of rock fragments on water movement and solute transport in a Loess Plateau soil
文献类型：期刊论文
| 作者 | Zhou Beibei ; Shao Ming'an ; Shao Hongbo |
| 刊名 | COMPTES RENDUS GEOSCIENCE
 |
| 出版日期 | 2009 |
| 卷号 | 341期号:6页码:462-472 |
| 关键词 | Rock fragment content Cumulative infiltration Saturated hydraulic conductivity Solute transport Loess Plateau China |
| 通讯作者 | Shao, MA |
| 英文摘要 | Calcium carbonate concretions are present in the soil of the Loess Plateau as a result of pedogenesis. The presence of these small rock fragments can have a great impact on soil bulk density, structure and water storage properties, as well as on soil water movement and solute transport processes. We studied the effects of different gravimetric rock fragment contents in a soil (R(w)) (0, 10, 20, 30, 40, 50, and 60%) on infiltration, saturated hydraulic conductivity (K(s)) and solute transport. Both infiltration rates and the saturated hydraulic conductivity initially decreased with increasing rock fragment content to minimum values for R(w) = 40%, and then increased. The Peck-Watson and Bouwer-Rice equations predicted K(s) for low rock fragment contents but failed to forecast the observed trends. Cumulative infiltration over time was described well by a power function. Solute transport processes, determined using CaCl(2) as a tracer, were accurately described by both the convection-dispersion equation (CDE) and the two-region model (T-R) although the T-R model fitted the experimental data a little better than the CDE, which is possibly more convenient to use. When R(w) was about 40% solute transport parameters indicated that relatively more advection occurred in this mixture where immobile regions occupied the greatest proportion of the columns. To cite this article: Z. Beibei et al., C R. Geoscience 341 (2009). (C) 2009 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2012-06-14 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/4830]  |
| 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 | Zhou Beibei,Shao Ming'an,Shao Hongbo. Effects of rock fragments on water movement and solute transport in a Loess Plateau soil[J]. COMPTES RENDUS GEOSCIENCE,2009,341(6):462-472. |
| APA | Zhou Beibei,Shao Ming'an,&Shao Hongbo.(2009).Effects of rock fragments on water movement and solute transport in a Loess Plateau soil.COMPTES RENDUS GEOSCIENCE,341(6),462-472. |
| MLA | Zhou Beibei,et al."Effects of rock fragments on water movement and solute transport in a Loess Plateau soil".COMPTES RENDUS GEOSCIENCE 341.6(2009):462-472. |
入库方式： OAI收割
来源：水土保持研究所
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