Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion

doi:10.1002/ldr.2825

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所科研产出--SCI > 2017--SCI

	Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion
	Wu, Min 6; Xu, Ximeng 3,4; Zheng, Fenli 3,5; Wilson, Glenn V.2; 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.
刊名	LAND DEGRADATION & DEVELOPMENT
	2017
卷号	28 期号:8 页码:2623-2635
关键词	Rainfall Simulation Runoff Slope Gradient Ephemeral Gully Erosion Upslope Drainage Area
ISSN号	1085-3278
DOI	10.1002/ldr.2825
文献子类	Article
英文摘要	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.
学科主题	Environmental Sciences & Ecology ; Agriculture
URL标识	查看原文
出版地	HOBOKEN
语种	英语
出版者	WILEY
WOS记录号	WOS:000414626400024
资助机构	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] ; 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]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.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.Inst Soil & Water Conservat, MWR, Yangling 712100, Shaanxi, Peoples R China 2.USDA ARS, Natl Sedimentat Lab, Oxford, MS 38655 USA 3.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Univ Mississippi, Natl Ctr Computat Hydrosci & Engn, Oxford, MS 38655 USA 5.Chinese Acad Sci, Yangling 712100, Shaanxi, Peoples R China 6.Shenyang Agr Univ, Coll Water Conservancy, Shenyang 110866, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Wu, Min,Xu, Ximeng,Zheng, Fenli,et al. Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion[J]. LAND DEGRADATION & DEVELOPMENT,2017,28(8):2623-2635.
APA	Wu, Min,Xu, Ximeng,Zheng, Fenli,Wilson, Glenn V.,&Zheng, FL .(2017).Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion.LAND DEGRADATION & DEVELOPMENT,28(8),2623-2635.
MLA	Wu, Min,et al."Upslope inflow, hillslope gradient and rainfall intensity impacts on ephemeral gully erosion".LAND DEGRADATION & DEVELOPMENT 28.8(2017):2623-2635.