ISWC OpenIR  > 水保所科研产出--SCI  > 2017--SCI
Impact of cornstalk buffer strip on hillslope soil erosion and its hydrodynamic understanding
Xu, Ximeng1,2; Zheng, Fenli1,2; Qin, Chao1; Wu, Hongyan1; Wilson, Glenn V.3; Zheng, FL (reprint author), Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2017
Source PublicationCATENA
ISSN0341-8162
description.correspondentemailxuxm@nwsuaf.edu.cn ; flzh@ms.iswc.ac.cn ; glqinchao@nwsuaf.edu.cn ; whyyun4511@126.com ; glenn.wilsom@ars.usda.gov
Volume149Pages:417-425
AbstractSoil erosion is still a serious concern on the Loess Plateau of China. Cornstalk buffer strips are not commonly utilized for erosion control on the Loess Plateau, and there is little hydrodynamic understanding of this soil erosion control practice. A simulated rainfall experiment was designed to investigate how a cornstalk buffer strip affected soil erosion and to enhance the hydrodynamic understanding of this method. Large loessial soil beds (10 m-long, and 3 m-wide) with slope gradient of 20 were subjected to three successive simulated rainfall events with intensities of 100 mm h(-1) for each experimental run. The rainfall events were conducted by a down sprinkler rainfall simulator system. Two treatments (with and without a cornstalk buffer strip) were tested in the following four runs: 1) without cornstalk buffer strip, 2) with cornstalk buffer strip in the third rain event, 3) with cornstalk buffer strip in the second rain event, 4) with continuous cornstalk buffer strip in all three successive rainfall events. In treatments with buffer, a 1 m-width cornstalk buffer strip was applied. The results showed that, compared with the run without cornstalk buffer strip, the run with continuous cornstalk buffer strip in three successive rainfall events reduced sediment yield by 29.1% while the other two runs with cornstalk buffer strip in a single event only reduced sediment yield by 2.0%-9.1%, and early buffer run had a larger reduction in soil erosion than late buffer run. The runoff-sediment relationship coefficients revealed that cornstalk buffer decreased the sediment concentration and increased the runoff threshold required for soil erosion initiation. Moreover, the buffer strip increased sheet flow velocity in interrill areas, while it decreased concentrated flow velocity in rills. This promoted a shift of rill flow to subcritical laminar flow which reduced sediment yield. Cornstalk buffer strip also increased the critical hydrodynamic forces required for the initiation of soil erosion. (C) 2016 Elsevier B.V. All rights reserved.
KeywordRainfall Simulations Rill Erosion Shear Stress Stream Power Runoff Threshold The Loess Plateau
Subject AreaGeology ; Agriculture ; Water Resources
DOI10.1016/j.catena.2016.10.016
URL查看原文
Indexed BySCI
Publication PlaceAMSTERDAM
Language英语
WOS IDWOS:000390733300041
PublisherELSEVIER SCIENCE BV
Funding OrganizationNational 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]; China Scholarship Council ; 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]; China Scholarship Council
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8050
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorZheng, FL (reprint author), Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.CAS & MWR, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.USDA ARS, Natl Sedimentat Lab, Oxford, MS 38655 USA
Recommended Citation
GB/T 7714
Xu, Ximeng,Zheng, Fenli,Qin, Chao,et al. Impact of cornstalk buffer strip on hillslope soil erosion and its hydrodynamic understanding[J]. CATENA,2017,149:417-425.
APA Xu, Ximeng,Zheng, Fenli,Qin, Chao,Wu, Hongyan,Wilson, Glenn V.,&Zheng, FL .(2017).Impact of cornstalk buffer strip on hillslope soil erosion and its hydrodynamic understanding.CATENA,149,417-425.
MLA Xu, Ximeng,et al."Impact of cornstalk buffer strip on hillslope soil erosion and its hydrodynamic understanding".CATENA 149(2017):417-425.
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