KMS Institute of soil and water conservation Chinese Academy of Sciences
Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion | |
Xu, Ximeng1,2; Zheng, Fenli1,3; Wilson, Glenn V.5; Wu, Min6; Zheng, FL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China. | |
文章类型 | Article |
2017 | |
发表期刊 | LAND DEGRADATION & DEVELOPMENT |
ISSN | 1085-3278 |
通讯作者邮箱 | flzh@ms.iswc.ac.cn |
卷号 | 28期号:8页码:2623-2635 |
摘要 | Ephemeral gullies (EGs) are major contributors to sediment loss and land degradation on cultivated lands. However, the topography and rainfall impacts on EG development processes are still unclear, especially on steep loessial hillslopes such as the Loess Plateau. A series of laboratory rainfall simulation experiments were conducted to investigate the impacts of topographic characteristics (3 typical slope gradients (S): 26.8%, 36.4%, and 46.6%; and 5 upslope drainage areas (A): 16, 32, 64, 96, and 128m(2)) and rainfall intensities (3 representative erosive rainfall intensities 50, 75, and 100mmhr(-1)) on EG erosion on a steep loessial hillslope. A large slope adjustable soil pan (8m-long, 2m-wide, and 0.6m-deep) and a side-sprinkler rainfall simulation system were used in this study. The results showed that soil loss increased when rainfall intensity, slope, and upslope drainage area increased. Upslope topography and inflow had great impacts on downslope EG erosion, and the contribution percentages ranged from 52.2% to 74.1%, from 48.3% to 71.4%, and from 29.5% to 66.7% for the 50, 75, and 100mmhr(-1) rainfall treatments, respectively. Runoff velocities with upslope inflow were 22.7% to 79.4% larger than those without inflow, and the upslope inflow was more effective than rainfall intensity in increasing runoff velocities in EG channels, thus caused more soil erosion. Soil loss equation based on rainfall intensity and AS(2) (product of the upslope drainage area and the square of the local slope gradient) was established and validated. The determination coefficient (R-2) and Nash-Sutcliffe simulation efficiency (E-NS) were 0.80 and 0.87, which showed satisfactory accuracy. This equation can be used to predict the EG erosion in various topographic and rainfall conditions on steep loessial hillslopes. |
关键词 | Rainfall Simulation Runoff Slope Gradient Ephemeral Gully Erosion Upslope Drainage Area |
学科领域 | Environmental Sciences & Ecology ; Agriculture |
DOI | 10.1002/ldr.2825 |
URL | 查看原文 |
收录类别 | SCI |
出版地 | HOBOKEN |
语种 | 英语 |
WOS记录号 | WOS:000414626400024 |
出版者 | WILEY |
项目资助者 | Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C2]; MWR Key Laboratory of Soil and Water Loss Process and Control in the Loess Plateau [2017001]; National Natural Science Foundation of China [41271299] ; Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C2]; MWR Key Laboratory of Soil and Water Loss Process and Control in the Loess Plateau [2017001]; National Natural Science Foundation of China [41271299] |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | sbir.nwafu.edu.cn/handle/361005/7898 |
专题 | 水保所科研产出--SCI_2017--SCI |
通讯作者 | Zheng, FL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China. |
作者单位 | 1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Univ Mississippi, Natl Ctr Computat Hydrosci & Engn, Oxford, MS 38655 USA 3.Chinese Acad Sci, Yangling 712100, Shaanxi, Peoples R China 4.Inst Soil & Water Conservat, MWR, Yangling 712100, Shaanxi, Peoples R China 5.USDA ARS, Natl Sedimentat Lab, Oxford, MS 38655 USA 6.Shenyang Agr Univ, Coll Water Conservancy, Shenyang 110866, Liaoning, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, Ximeng,Zheng, Fenli,Wilson, Glenn V.,et al. Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion[J]. LAND DEGRADATION & DEVELOPMENT,2017,28(8):2623-2635. |
APA | Xu, Ximeng,Zheng, Fenli,Wilson, Glenn V.,Wu, Min,&Zheng, FL .(2017).Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion.LAND DEGRADATION & DEVELOPMENT,28(8),2623-2635. |
MLA | Xu, Ximeng,et al."Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion".LAND DEGRADATION & DEVELOPMENT 28.8(2017):2623-2635. |
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