Effects of upslope inflow rate, tillage depth, and slope gradients on hillslope erosion processes and hydrodynamic mechanisms
文献类型：期刊论文
| 作者 | Zhao, Luyou1,4,6; Qin, Qishan5; Geng, Huajie5; Zheng, Fenli1,5,6; Zhang, Xunchang J.3; Li, Guifang1,4,6; Xu, Xiangzhou6; Zhang, Jiaqiong1,2,5,6 |
| 刊名 | CATENA
 |
| 出版日期 | 2023-07-01 |
| 卷号 | 228页码:14 |
| ISSN号 | 0341-8162 |
| 关键词 | Dimensionless hydrodynamic parameter Inflow rate Slope gradient Soil erosion rates Tillage depth |
| DOI | 10.1016/j.catena.2023.107189 |
| 通讯作者 | Zhang, Jiaqiong(flzh@ms.iswc.ac.cn) |
| 英文摘要 | Inflow rate, tillage depth and slope gradient play vital roles in hillslope soil erosion processes. However, the effects of these factors and their interactions on hillslope soil erosion processes, particularly on long slopes in the Chinese Mollisol region, are still lacking to date. Thus, a set of laboratory experiments, including six upslope inflow rates (0, 50, 100, 150, 200 and 300 L min-1), two tillage depths (5 and 20 cm) and two slope gradients (5 degrees and 10 degrees), were conducted to quantify the impacts of these factors and their interactions on hillslope soil erosion processes. The results showed that soil erosion rates increased as a power function with increase of inflow rate and slope gradient, while they decreased as a power function with an increase in tillage depth. The slope gradient had a greater impact on soil erosion rates than inflow rate and tillage depth. Moreover, inflow rate, slope gradient, and their pairwise interaction mainly governed hillslope soil erosion. Compared with hillslope soil erosion, hillslope runoff rate was dominantly affected by inflow rate. The inflow rate and slope gradient affected the hydrodynamic characteristics and erosion rates by shifting erosion patterns; while tillage depth mainly influenced them by converting surface flow to seepage flow. In addition, the dimensionless effective stream power was the optimal index (R2 = 0.884, NSE = 0.861) affecting soil erosion rates, followed by the dimensionless stream power (R2 = 0.879, NSE = 0.848). The dimensionless soil erosion rates were correlated with the dimensionless hydrodynamic parameter following a power function. Therefore, soil erosion in the Chinese Mollisol region could be effectively prevented by dispersing runoff, increasing deep tillage and reducing the impact of slope gradient through soil conservation measures. |
| WOS关键词 | SEDIMENT TRANSPORT CAPACITY ; SOIL DETACHMENT CAPACITY ; UNIT STREAM POWER ; RILL EROSION ; RAINFALL INTENSITY ; CONCENTRATED FLOW ; INTERRILL EROSION ; RAINDROP IMPACT ; WATER EROSION ; GULLY EROSION |
| 资助项目 | National Key R amp; D Plan Project[42177326] ; National Natural Science Founda- tion of China ; [2022YFD1500102] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001054572000001 |
| 资助机构 | National Key R amp; D Plan Project ; National Natural Science Founda- tion of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/196507]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang, Jiaqiong |
| 作者单位 | 1.Chinese Acad Sci & Minist Educ, Res Ctr Soil & Water Conservat & Ecol Environm, State Key Lab Soil Eros & Dryland Farming Loess Pl, 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.USDA ARS, Oklahoma & Cent Plains Agr Res Ctr, 7207 W Cheyenne St, El Reno, OK 73036 USA 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Peoples R China 6.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Luyou,Qin, Qishan,Geng, Huajie,et al. Effects of upslope inflow rate, tillage depth, and slope gradients on hillslope erosion processes and hydrodynamic mechanisms[J]. CATENA,2023,228:14. |
| APA | Zhao, Luyou.,Qin, Qishan.,Geng, Huajie.,Zheng, Fenli.,Zhang, Xunchang J..,...&Zhang, Jiaqiong.(2023).Effects of upslope inflow rate, tillage depth, and slope gradients on hillslope erosion processes and hydrodynamic mechanisms.CATENA,228,14. |
| MLA | Zhao, Luyou,et al."Effects of upslope inflow rate, tillage depth, and slope gradients on hillslope erosion processes and hydrodynamic mechanisms".CATENA 228(2023):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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