| Effects of vegetation buffer strips on concentrated flow hydraulics and gully bed erosion based on in situ scouring experiments | |
Yifan Dong1,3 ; Donghong Xiong1; Zheng'an Su1; Dan Yang1; Xueyong Zheng1; Liangtao Shi2; Jean Poesen3
| |
| 通讯作者 | Donghong Xiong |
| 2018 | |
| 发表期刊 | LAND DEGRADATION & DEVELOPMENT
 |
| ISSN | 1085-3278 |
| EISSN | 1099-145X |
| 卷号 | 29期号:6页码:1672-1682 |
| 文章类型 | Article |
| 产权排序 | 2 |
| 摘要 | Vegetation on gully beds could intercept runoff, reduce incision of gully bed, and trap sediment from upstream area. The aim of this study is to evaluate the influences of vegetation buffer strips on concentrated flow hydraulics and gully bed erosion downstream of gully headcuts. Five gully head plots containing different buffer strip widths with similar vegetation density were constructed for in situ scouring experiments. Each plot received 11 tests with 2 discharges (i.e., 7 tests simulating 83.3 L min(-1) and 4 tests simulating 166.7 L min(-1)). Buffer strips clearly decrease flow hydraulics (about 56-70%) and increase flow resistance (1.2 to 1.5 times) according to the selected hydraulic parameters. After 11 tests, total net erosion volume (NEV) and average sediment concentration from each gully bed showed an exponential decreasing relationship with increasing widths of buffer strips. All the selected hydraulic parameters showed a strong correlation with total NEV from the bare soil sections (0.43 < R-2 < .61 with significance level reaching .01), whereas the relationship was very weak in the buffer strips. The gross deposition volume in buffer strips showed a linear correlation with upstream NEV (NEVu) and flow velocity (R-2 = .91, p < .001). Split flow effects expressed by braid index increased with increasing widths of buffer strips and scouring times. Both bare and vegetated sections suffered from erosion clearly, but the average NEV from buffer strips was about 30.2% of bare soil sections. This indicated the buffer strip effects on reducing erosion were more significant than trapping sediments were in this study. |
| 关键词 | braid index deposition gully erosion split flow effects vegetation buffer strips |
| DOI | 10.1002/ldr.2943 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000435278900013 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imde.ac.cn/handle/131551/23161 |
| 专题 | 山地灾害与地表过程重点实验室 |
| 通讯作者 | Donghong Xiong |
| 作者单位 | 1.Key Laboratory of Mountain Hazards &Surface Process, Institute of MountainHazards and Environment, Chinese Academyof Sciences, 610041 Chengdu, PR China; 2.Institute of Tropical Eco‐agriculturalSciences, Yunnan Academy of AgriculturalSciences, Yuanmou 651300 Yunnan, PR China; 3.Division of Geography and Tourism,Department of Earth and EnvironmentalSciences, Katholieke Universiteit Leuven,Celestijnenlaan 200E, BE‐3001 Heverlee,Belgium |
| 推荐引用方式 GB/T 7714 | Yifan Dong,Donghong Xiong,Zheng'an Su,et al. Effects of vegetation buffer strips on concentrated flow hydraulics and gully bed erosion based on in situ scouring experiments[J]. LAND DEGRADATION & DEVELOPMENT,2018,29(6):1672-1682. |
| APA | Yifan Dong.,Donghong Xiong.,Zheng'an Su.,Dan Yang.,Xueyong Zheng.,...&Jean Poesen.(2018).Effects of vegetation buffer strips on concentrated flow hydraulics and gully bed erosion based on in situ scouring experiments.LAND DEGRADATION & DEVELOPMENT,29(6),1672-1682. |
| MLA | Yifan Dong,et al."Effects of vegetation buffer strips on concentrated flow hydraulics and gully bed erosion based on in situ scouring experiments".LAND DEGRADATION & DEVELOPMENT 29.6(2018):1672-1682. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Effects of vegetatio（780KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论