Sediment and solute transport on soil slope under simultaneous influence of rainfall impact and scouring flow
文献类型：期刊论文
| 作者 | Guo Tailong ; Wang Quanjiu ; Li Dingqiang |
| 刊名 | HYDROLOGICAL PROCESSES
 |
| 出版日期 | 2010 |
| 卷号 | 24期号:11页码:1446-1454 |
| 关键词 | loess soil erosion solute transport scouring inflow rates Reynolds number |
| 通讯作者 | Wang, QJ |
| 英文摘要 | Soil erosion and nutrient losses with surface runoff in the loess plateau in China cause severe soil quality degradation and water pollution. It is driven by both rainfall impact and runoff flow that usually take place simultaneously during a rainfall event. However, the interactive effect of these two processes on soil erosion has received limited attention. The objectives of this study were to better understand the mechanism of soil erosion, solute transport in runoff, and hydraulic characteristics of flow under the simultaneous influence of rainfall and shallow clear-water flow scouring. Laboratory flume experiments with three rainfall intensities (0, 60, and 120 mm h(-1)) and four scouring inflow rates (10, 20, 30, and 40 l min(-1)) were conducted to evaluate their interactive effect on runoff. Results indicate that both rainfall intensity and scouring inflow rate play important roles on runoff formation, soil erosion, and solute transport in the surface runoff. A rainfall splash and water scouring interactive effect on the transport of sediment and solute in runoff were observed at the rainfall intensity of 60 mm h(-1) and scouring inflow rates of 20 l min(-1). Cumulative sediment mass loss (Ms) was found to be a linear function of cumulative runoff volume (Wr) for each treatment. Solute transport was also affected by both rainfall intensity and scouring inflow rate, and the decrease in bromide concentration in the runoff with time fitted to a power function well. Reynolds number (Re) was a key hydraulic parameter to determine erodability on loess slopes. The Darcy-Weisbach friction coefficients (f) decreased with the Reynolds numbers (Re), and the average soil and water loss rate (M(1)) increased with the Reynolds numbers (Re) on loess slope for both scenarios with or without rainfall impact. Copyright (C) 2010 John Wiley & Sons, Ltd. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2012-06-11 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/4775]  |
| 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 | Guo Tailong,Wang Quanjiu,Li Dingqiang. Sediment and solute transport on soil slope under simultaneous influence of rainfall impact and scouring flow[J]. HYDROLOGICAL PROCESSES,2010,24(11):1446-1454. |
| APA | Guo Tailong,Wang Quanjiu,&Li Dingqiang.(2010).Sediment and solute transport on soil slope under simultaneous influence of rainfall impact and scouring flow.HYDROLOGICAL PROCESSES,24(11),1446-1454. |
| MLA | Guo Tailong,et al."Sediment and solute transport on soil slope under simultaneous influence of rainfall impact and scouring flow".HYDROLOGICAL PROCESSES 24.11(2010):1446-1454. |
入库方式： OAI收割
来源：水土保持研究所
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