Impacts of soil properties on flow velocity under rainfall events: Evidence from soils across the Loess Plateau
文献类型：期刊论文
| 作者 | Sun, Liying1,3 ; Zhou, John L.3; Cai, Qiangguo1,2
|
| 刊名 | CATENA
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 194页码:11 |
| 关键词 | Loess Plateau Rainfall impacts Slope effects Mean flow velocity Soil property |
| ISSN号 | 0341-8162 |
| DOI | 10.1016/j.catena.2020.104704 |
| 通讯作者 | Sun, Liying(sunliying@igsnrr.ac.cn) |
| 英文摘要 | Flow velocity is one of the most significant hydraulic parameters directly connected to sediment transport-deposition processes. Four soils were collected from north to south of the Loess Plateau, namely Sandy Loess (SL), Loessial Soil (LS), Heilu Soil (HS) and Anthrosol Soil (AS), to examine the impacts of soil property on mean flow velocity in both interrill and rill flows under different simulated rainfall experiments. The mean velocity of interrill flow (MVIF) followed the order of LS > HS approximate to AS > SL at 90 mm h(-1) rainfall intensity and LS > HS > AS > SL at 120 mm h(-1) rainfall intensity. The mean velocity of rill flow (MVRF) decreased as LS approximate to HS > AS at 90 mm h(-1) and LS approximate to HS > AS > SL at 120 mm h(-1). The order of MVIF and MVRF on four soil slopes is determined by the relations of runoff discharge, Darcy-Weisbach friction factor in interrill area (f(1)) and rills (f(R)), which are closely related to soil properties. Soil properties also changed the effects of rainfall intensity on flow velocities in different erosion stages, resulting in the increasing trend of MVIF on SL, HS and AS slopes and the decreasing trend of MVIF on LS slope with the increase of rainfall intensity. Moreover, soil properties may change the variations of MVIF and MVRF with the increase of slope gradient, by altering the relations of sealing progress and slope effect. The slope effect determined the increasing trend of MVIF with the increase of slope gradients. However, the sealing progress may offset the slope effect and cause the decrease of MVIF on the critical slopes, and the critical slope decreased from the north (20 degrees and 25 degrees) to the south (15 degrees). The equal roles of rill bed roughness and slope effect caused the unchanged of MVRF on LS and HS slopes, while rill bed roughness dominated the fluctuations of MVRF on SL and AS slopes. |
| WOS关键词 | INTERRILL EROSION ; SURFACE-ROUGHNESS ; RILL HYDRAULICS ; SLOPE GRADIENT ; PARTICLE-SIZE ; BED ROUGHNESS ; SEDIMENT ; WATER ; ERODIBILITY ; SELECTIVITY |
| 资助项目 | National Natural Science Foundation of China[41977069] ; National Natural Science Foundation of China[41771314] ; National Key Research and Development Program of China[2016YFA0601900] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000566699000038 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/156853]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Sun, Liying |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Univ Technol Sydney, Sch Civil & Environm Engn, 15 Broadway, Sydney, NSW 2007, Australia |
| 推荐引用方式 GB/T 7714 | Sun, Liying,Zhou, John L.,Cai, Qiangguo. Impacts of soil properties on flow velocity under rainfall events: Evidence from soils across the Loess Plateau[J]. CATENA,2020,194:11. |
| APA | Sun, Liying,Zhou, John L.,&Cai, Qiangguo.(2020).Impacts of soil properties on flow velocity under rainfall events: Evidence from soils across the Loess Plateau.CATENA,194,11. |
| MLA | Sun, Liying,et al."Impacts of soil properties on flow velocity under rainfall events: Evidence from soils across the Loess Plateau".CATENA 194(2020):11. |
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。