Response of the Headcut Erosion Process to Flow Energy Variation in the Loess Gully Region of China
文献类型：期刊论文
| 作者 | Shi, Qianhua1; Wang, Wenlong2; Feng, Lanqian3 |
| 刊名 | WATER
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 14期号:19页码:15 |
| 关键词 | headcut erosion flow energy sediment yield loess gully region simulated rainfall combined scouring experiment |
| DOI | 10.3390/w14193038 |
| 通讯作者 | Wang, Wenlong(nwafu_wwl@163.com) |
| 英文摘要 | In the headcut erosion process, flow energy is transformed and consumed when runoff is used to transport sediment. Therefore, flow energy variations are critical in the study of headcut erosion. The aim of this study was to illustrate the effects of the upslope inflow discharge and slope gradient on flow energy and the response of the sediment yield of headcut erosion to flow energy variations in China's Loess Plateau. This study examined the headcut erosion using slope gradients ranging from 1 degrees to 7 degrees and designed and upslope inflow discharges of 3.6, 4.8, 6.0 and 7.2 m(3).h(-1). The rainfall intensity was set as invariable 0.8 mm.min(-1). The results showed that the kinetic energy at the downstream gully bed was 0.03 similar to 0.16 J.s(-1) lower than that in the upstream catchment area because of the concentrated flow drop at the gully head. The potential energy at the summit and bottom of the plot were both affected by upstream inflow discharge and slope gradient. The flow energy consumption values of the gully head increased by approximately 1.26 times as the inflow discharge increased by 1.2 m(3).h(-1). Greater energy consumption occurred at the gully head than in the upstream catchment area and downstream gully bed, and the gully head contribution to the flow energy consumption was 44.30 similar to 64.29%, which showed an increasing trend as the upslope inflow discharge increased and slope gradient decreased. The influence of the slope gradient on the sediment yield was stronger than that of the upslope inflow discharge, and a nonlinear regression equation was established to calculate the sediment yield. The flow energy consumption showed a significant correlation with the sediment yield (p < 0.01). Our results could enhance the understanding of the flow energy variations and headcut evolution process during headcut erosion and can also be helpful in the design of gully erosion prevention measures. |
| WOS关键词 | DRY-HOT VALLEY ; INITIAL STEP HEIGHT ; SOIL-EROSION ; SEDIMENT YIELD ; BANK GULLIES ; SLOPE ; MIGRATION ; VELOCITY ; RAINFALL ; PLATEAU |
| 资助项目 | Ph.D. early development program of Taiyuan Science and Technology University[20212031] ; National Natural Science Foundation of China[42107356] ; National Natural Science Foundation of China[42077079] ; National Natural Science Foundation of China[41907057] |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000867131000001 |
| 资助机构 | Ph.D. early development program of Taiyuan Science and Technology University ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/185734]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Wenlong |
| 作者单位 | 1.Taiyuan Univ Sci & Technol, Sch Environm & Resources, Taiyuan 030024, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Xianyang 712100, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Xianyang 712100, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi, Qianhua,Wang, Wenlong,Feng, Lanqian. Response of the Headcut Erosion Process to Flow Energy Variation in the Loess Gully Region of China[J]. WATER,2022,14(19):15. |
| APA | Shi, Qianhua,Wang, Wenlong,&Feng, Lanqian.(2022).Response of the Headcut Erosion Process to Flow Energy Variation in the Loess Gully Region of China.WATER,14(19),15. |
| MLA | Shi, Qianhua,et al."Response of the Headcut Erosion Process to Flow Energy Variation in the Loess Gully Region of China".WATER 14.19(2022):15. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
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。