KMS Institute of soil and water conservation Chinese Academy of Sciences
| Effect of embedded-rock fragments on slope soil erosion during rainfall events under simulated laboratory conditions | |
| Tiexiong Gong1,2; Yuanjun Zhu1,2; Ming'an Shao1,2; Zhu, YJ (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China. | |
| 文章类型 | Article |
| 2018 | |
| 发表期刊 | JOURNAL OF HYDROLOGY
 |
| ISSN | 0022-1694 |
| 通讯作者邮箱 | zhuyj@nwsuaf.edu.cn |
| 卷号 | 563页码:811-817 |
| 摘要 | Quantifying the role of embedded-rock fragments in soil-water processes on a slope is crucial for the application of rock fragments in soil and water conservation practice. In this study, a laboratory runoff and erosion experiment was conducted in the soils embedded with rock fragments (including five rock fragment contents (RC) of 0, 0.1, 0.2, 0.3, and 0.4 kg kg(-1)) in a metal flume under three slopes (5 degrees, 10 degrees, and 15 degrees). Results showed that the mean steady infiltration rate in the soil without rock fragment (NULL) was lower than that in the soils containing rock fragments (low rock fragment contents of 0.1-0.2 kg kg(-1) and high rock fragment contents of 0.3-0.4 kg kg(-1), labelled as LOW and HIGH, respectively) as slope gradient = 5 degrees, but was higher than the latter two soils as slope gradients = 10 degrees and 15 degrees. Initial infiltration rate significantly increased with RC (P < 0.05). Runoff discharge was negatively related to RC as slope gradient = 5 degrees and was positively related to it as slope gradients = 10 degrees and 15 degrees. There was a steady sediment concentration (SC) after runoff generated as slope gradient = 5 degrees. Sediment discharge and soil erosion modulus for the treatment of HIGH significantly increased with slope gradient (P < 0.05). Reynolds number (Re) decreased with RC and the other hydraulic parameters of friction coefficient (f), shear stress (tau), and stream power (omega) increase with RC. In general, the embedded-rock fragment in the soil can accelerate soil erosion by changing the ratio of infiltration/runoff, surface roughness, and related hydraulic parameters, especially under higher slope gradients. Our findings suggest that using rock fragments to control soil erosion is workable only under the conditions of lower slope gradients and rock fragment contents. |
| 关键词 | Rock Fragment Runoff And Sediment Discharge Sediment Concentration Soil Loss |
| 学科领域 | Engineering ; Geology ; Water Resources |
| DOI | 10.1016/j.jhydrol.2018.06.054 |
| 收录类别 | SCI |
| 出版地 | PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS |
| 语种 | 英语 |
| WOS记录号 | WOS:000441492700065 |
| 出版者 | ELSEVIER SCIENCE BV |
| 项目资助者 | National Natural Science Foundation of China [41371242, 41530854] ; National Natural Science Foundation of China [41371242, 41530854] ; Key Research Program of the Chinese Academy of Sciences [KFZD-SW-306] ; Key Research Program of the Chinese Academy of Sciences [KFZD-SW-306] |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | sbir.nwafu.edu.cn/handle/361005/8197 |
| 专题 | 水保所科研产出--SCI_2018--SCI |
| 通讯作者 | Zhu, YJ (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China. |
| 作者单位 | 1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tiexiong Gong,Yuanjun Zhu,Ming'an Shao,et al. Effect of embedded-rock fragments on slope soil erosion during rainfall events under simulated laboratory conditions[J]. JOURNAL OF HYDROLOGY,2018,563:811-817. |
| APA | Tiexiong Gong,Yuanjun Zhu,Ming'an Shao,&Zhu, YJ .(2018).Effect of embedded-rock fragments on slope soil erosion during rainfall events under simulated laboratory conditions.JOURNAL OF HYDROLOGY,563,811-817. |
| MLA | Tiexiong Gong,et al."Effect of embedded-rock fragments on slope soil erosion during rainfall events under simulated laboratory conditions".JOURNAL OF HYDROLOGY 563(2018):811-817. |
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