Spatial scale dependence of sediment dynamics in a gullied rolling loess region on the Loess Plateau in China
文献类型：SCI/SSCI论文
| 作者 | Fang H. Y. ; Li Q. Y. ; Cai Q. G. ; Liao Y. S. |
| 发表日期 | 2011 |
| 关键词 | Spatial scale Sediment dynamics Sediment peak Peak discharge Hysteresis loop Hyperconcentrated flow estimating suspended sediment hyperconcentrated flows water discharge drainage-basin yellow-river hilly areas transport catchment yorkshire event |
| 英文摘要 | Sediment dynamics is still imperfectly understood, especially at spatial scale in the highly erodible region of the Loess Plateau, and few studies have been heretofore conducted. Using 5-year continuous water and sediment records, three plots and three basins in the gullied rolling loess region were selected and sediment dynamics at spatial scale was studied. Results showed that the floods, where the peak discharge (Q(p)) did not come earlier than the sediment peak, were predominant in slope zones, occupying >90 and >70% of the total for the Mao slope and for the Entire slope, respectively. However, in basins, most of the sediment peaks (C(p)) lagged behind Q(p), implying that slope zone was the main origin of sediment. More than 50% of the events presented clockwise hysteresis loops in the Mao slope area, while almost all the events had anticlockwise hysteresis loops in basins. This can be attributed to less occurring frequency of hyperconcentrated flow, as well as its instability in slope zones, compared to those in the basins. Within these contexts, gravitational erosion made the highest sediment concentration (C) in Tuanshangou basin and median developing status of C-discharge (C-Q) relationships in the Entire slope area. This study provides insights into the protection of slope surface and disruption of the development of hyperconcentrated flow to reduce soil loss. |
| 出处 | Environmental Earth Sciences |
| 卷 | 64 |
| 期 | 3 |
| 页 | 693-705 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1866-6280 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24050]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Fang H. Y.,Li Q. Y.,Cai Q. G.,et al. Spatial scale dependence of sediment dynamics in a gullied rolling loess region on the Loess Plateau in China. 2011. |
入库方式： OAI收割
来源：地理科学与资源研究所
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