Effects of hedgerows on sediment erosion in Three Gorges Dam Area, China
文献类型：SCI/SSCI论文
| 作者 | Bu C. F. ; Gai Q. G. ; Ng S. L. ; Chau K. C. ; Ding S. W. |
| 发表日期 | 2008 |
| 关键词 | hedgerow erosion runoff soil properties Three Gorges Dam Project 3 gorges delivery land |
| 英文摘要 | The Three Gorges Dam Area refers to the river section from Chongqing to Yichang on the Yangtze River, which has a drainage area of 75,098 kin 2, and involves 19 cities and counties. Contour hedgerows have been used in this area to control soil erosion and to improve hillslope stability in the catchment of this river section. Five experimental hedgerow plots were established in 1994 in order to study the effects of hedgerows on erosion control. During the period of 1994-1997, runoff and soil loss data were collected on these test plots, including the chemical and physical properties of soil and related topographical data. The results indicate that: (1) after 4 years of cultivation and crop planting, soil fertility increased dramatically in the hedgerow plots. Soil organic matter, total nitrogen, and total phosphorus contents in the hedgerow plots were 5-9 times higher than that in the control plot. In each of the hedgerow plots, soil structure became more stable, the quantity of granules larger than 0.02 mm increased and those finer than 0.02 min decreased; (2) All hedgerow plots showed a major effect on reducing soil loss and surface runoff; (3) Overland flow velocity along the upper portion of the hedgerow plots was greatly reduced due to hedgerow resistance, which explains the significant decrease in soil losses in hedgerow plots, despite the fact that the hedgerow plots and the control plots had the same total runoff. |
| 出处 | International Journal of Sediment Research |
| 卷 | 23 |
| 期 | 2 |
| 页 | 119-129 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1001-6279 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24294]  |
| 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 | Bu C. F.,Gai Q. G.,Ng S. L.,et al. Effects of hedgerows on sediment erosion in Three Gorges Dam Area, China. 2008. |
入库方式： OAI收割
来源：地理科学与资源研究所
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