Combined effects of rainfall and flow depth on the resistance characteristics of sheet flow on gentle slopes
文献类型：期刊论文
| 作者 | Shen, Enshuai1,2,3; Liu, Gang1,2; Dan, Chenxi2; Shu, Chengbo2; Wang, Ruijun2; Liu, Xiaoqing2; Zhou, Jiaxin2; Chen, Xiangyu2 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 603页码:11 |
| 关键词 | Sheet flow Rainfall intensity Raindrop diameter Flow resistance Reynolds number |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2021.127112 |
| 通讯作者 | Liu, Gang(gliu@foxmail.com) |
| 英文摘要 | Rainfall and sheet flow (SF) on gentle slopes always appear concurrently. However, the combined effects of rainfall and flow depth on SF resistance are still unclear for gentle slopes. In this study, two sets of experiments, namely, upstream inflow with rainfall and upstream inflow only, were conducted to investigate the resistance characteristics of SF on a flat and smooth flume with three gentle slopes (3 degrees, 5 degrees and 7 degrees). The experimental results indicated that in the tests with upstream inflow only, the Darcy-Weisbach resistance (f) and Manning coefficient (n) decreased following a power function with increasing flow depth. When the Reynolds number (Re) was less than 1070, the n and f of the SF in the upstream inflow alone decreased with increasing Re following the power function. Both the n and f of the SF increased with increasing rainfall intensity for the upstream inflow with the rainfall tests. The rainfall significantly affected the f and n of the SF in the low Re zone (Re < 1070), inflow discharge (<0.06 m(2) min(-1)) and flow energy for all inflow with rainfall cases. Under the conditions of upstream inflow with rainfall, both the f and n of the SF decreased with the increase in the ratio between the flow depth and median raindrop diameter (H/D50) in the power function. This result indicated that a deeper flow could dissipate more raindrop energy. In addition, empirical equations among Re, hydraulic slope and H/D50 were established to predict the n and f of the SF for upstream inflow with rainfall tests. This study will be helpful in understanding the combined effects of rainfall and flow depth on SF and could provide a scientific basis for improving hydrological and soil erosion models. |
| WOS关键词 | EROSION PROCESSES ; RAINDROP-IMPACT ; OVERLAND-FLOW ; ROUGHNESS COEFFICIENT ; MANNING COEFFICIENT ; BED ROUGHNESS ; SOIL-EROSION ; WATER-DEPTH ; SEDIMENT ; RUNOFF |
| 资助项目 | Strategic Priority Research Program of the Chinese Academy of Sciences[XDA28010201] ; Natural Science Basic Research Plan in Shaanxi Province of China[2020JM-163] ; Water Conservancy Science and Technology Innovation Project in Guangdong Province of China[2020-21] ; Central Government to Guide Local Scientific and Technological Development Project[2021ZY0023] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000715326800040 |
| 出版者 | ELSEVIER |
| 资助机构 | Strategic Priority Research Program of the Chinese Academy of Sciences ; Natural Science Basic Research Plan in Shaanxi Province of China ; Water Conservancy Science and Technology Innovation Project in Guangdong Province of China ; Central Government to Guide Local Scientific and Technological Development Project |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/167608]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Gang |
| 作者单位 | 1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Enshuai,Liu, Gang,Dan, Chenxi,et al. Combined effects of rainfall and flow depth on the resistance characteristics of sheet flow on gentle slopes[J]. JOURNAL OF HYDROLOGY,2021,603:11. |
| APA | Shen, Enshuai.,Liu, Gang.,Dan, Chenxi.,Shu, Chengbo.,Wang, Ruijun.,...&Chen, Xiangyu.(2021).Combined effects of rainfall and flow depth on the resistance characteristics of sheet flow on gentle slopes.JOURNAL OF HYDROLOGY,603,11. |
| MLA | Shen, Enshuai,et al."Combined effects of rainfall and flow depth on the resistance characteristics of sheet flow on gentle slopes".JOURNAL OF HYDROLOGY 603(2021):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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