Effect of vegetation on the flow pathways of steep hillslopes: Overland flow plot-scale experiments and their implications
文献类型：期刊论文
| 作者 | Wang, Lunjiang2,3,5; Zhang, Yanle4; Jia, Junchao1; Zhen, Qing2,3; Zhang, Xingchang2,3 |
| 刊名 | CATENA
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 204页码:11 |
| ISSN号 | 0341-8162 |
| 关键词 | Hillslope Vegetation Flow pathway Hydraulics Infiltration Soil erosion Connectivity |
| DOI | 10.1016/j.catena.2021.105438 |
| 通讯作者 | Zhen, Qing(zhenqing10@nwafu.edu.cn) |
| 英文摘要 | Overland flow pathways probably play a key role in linking vegetation to its effects on runoff generation and soil loss on the hillslope. However, there is little empirical work testing the links. This study aims to address how flow pathway characteristics vary with plant spacing and determine their relationships with infiltration and soil loss. Upslope inflow experiments were carried out on 10 vegetated plots under a small inflow rate. Total flow path width (RW), mean width per flow path (WPP), and total flow path length (FL), were used to quantify the flow pathway characteristics by analyzing photographs of the plot surface taken during the experiment. The results showed that RW and WPP decreased (R-2 = 0.86 and R-2 = 0.90), while the FL increased (R-2 = 0.67) as alfalfa spacing increased. The RW was positively related to the infiltration rate in the early period of the experiment, indicating that runoff loss via infiltration as affected by the flow paths needs to be considered in hydrological models. Runoff velocity was detected to be significantly related to the flow pathway characteristics. The relationship can partially explain the variances of runoff hydraulics on the vegetated hillslopes in previous studies, in which the variation of flow pathways was not taken into account. The soil loss decreased with the RW and WPP while increased with the FL. As the flow pathway characteristics expressed real-time and actual movement of overland flow, they represented the functional connectivity of sediment on the hillslope. The relationships between soil loss and flow pathway became insignificant as the upslope inflow progressed despite no marked change in the flow pathway. Our results imply that both functional connectivity and the soil's resistance to erosion should be considered to obtain a good prediction of the soil loss from hillslopes. |
| WOS关键词 | SEDIMENT TRANSPORT ; SOIL-EROSION ; WALNUT-GULCH ; ROUGHNESS ; RUNOFF ; CONNECTIVITY ; INFILTRATION ; HYDRAULICS ; WATER ; COEFFICIENTS |
| 资助项目 | State Key Research & Development Plan Project[2017YFC0504704] ; Guizhou Provincial Science and Technology Projects[QKHJC-ZK[2021]YB222] ; Science and Technology Service Network Initiative[KFJ-STS-QYZD-177] ; Light of West China Program[XAB2019B12] ; Introduced Talents Scientific Research Grants of Guizhou University[2019 (27)] ; Top Discipline Construction Project of Guizhou Province[GNYL[2017]007] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000657369600051 |
| 资助机构 | State Key Research & Development Plan Project ; Guizhou Provincial Science and Technology Projects ; Science and Technology Service Network Initiative ; Light of West China Program ; Introduced Talents Scientific Research Grants of Guizhou University ; Top Discipline Construction Project of Guizhou Province |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/164035]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhen, Qing |
| 作者单位 | 1.Bioagr Inst Shaanxi, Xian 710043, Shaanxi, Peoples R China 2.Northwest Agr & Forestry Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 4.Shangluo Univ, Coll Chem Engn & Modern Mat, Shangluo 726000, Peoples R China 5.Guizhou Univ, Coll Forestry, Guiyang 550025, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Lunjiang,Zhang, Yanle,Jia, Junchao,et al. Effect of vegetation on the flow pathways of steep hillslopes: Overland flow plot-scale experiments and their implications[J]. CATENA,2021,204:11. |
| APA | Wang, Lunjiang,Zhang, Yanle,Jia, Junchao,Zhen, Qing,&Zhang, Xingchang.(2021).Effect of vegetation on the flow pathways of steep hillslopes: Overland flow plot-scale experiments and their implications.CATENA,204,11. |
| MLA | Wang, Lunjiang,et al."Effect of vegetation on the flow pathways of steep hillslopes: Overland flow plot-scale experiments and their implications".CATENA 204(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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