The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients
文献类型：期刊论文
| 作者 | HE Ji-jun; SUN Li-ying; GONG Hui-li; CAI Qiang-guo; JIA Li-juan |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2016-03 |
| 卷号 | 13期号:3页码:397-404 |
| 关键词 | Rill erosion Erosion processes Simulated rainfall Runoff Slope gradient |
| ISSN号 | 1672-6316 |
| 通讯作者 | HE Ji-jun |
| 英文摘要 | Rill formation is the predominant erosion process in slope land in the Loess Plateau, China. This study was conducted to investigate rill erosion characteristics and their effects on runoff and sediment yielding processes under different slope gradients at a rate of 10°, 15°, 20° and 25° with rainfall intensity of 1.5 mm min-1 in a laboratory setting. Results revealed that mean rill depth and rill density has a positive interrelation to the slope gradient. To the contrary, width-depth ratio and distance of the longest rill to the top of the slope negatively related to slope gradient. All these suggested that increasing slope steepness could enhance rill headward erosion, vertical erosion and the fragmentation of the slope surface. Furthermore, total erosion tended to approach a stable maximum value with increasing slope, which implied that there is probably a threshold slope gradient where soil erosion begins to weaken. At the same time, the correlation analysis showed that there was a close connection between slope gradient and the various indices of soil erosion: the correlation coefficients of slope gradient with maximal rill depth, number of rills and the distance of the longest rill from the top of the slope were 0.98, 0.97 and -0.98, respectively, indicating that slope gradient is the major factor of affecting the development of rills. Furthermore, runoff was not sensitive to slope gradient and rill formation in this study. Sediment concentration, however, is positively related to slope gradient and rill formation, the sediment concentrations increased rapidly after rill initiation, especially. These results may be essential for soil loss prediction. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/14084]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.3 |
| 推荐引用方式 GB/T 7714 | HE Ji-jun,SUN Li-ying,GONG Hui-li,et al. The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients[J]. Journal of Mountain Science,2016,13(3):397-404. |
| APA | HE Ji-jun,SUN Li-ying,GONG Hui-li,CAI Qiang-guo,&JIA Li-juan.(2016).The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients.Journal of Mountain Science,13(3),397-404. |
| MLA | HE Ji-jun,et al."The characteristics of rill development and their effects on runoff and sediment yield under different slope gradients".Journal of Mountain Science 13.3(2016):397-404. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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