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The impact of natural polymer derivatives on sheet erosion on experimental loess hillslope
Liu, J. E.1,2; Wang, Z. L.2,3; Yang, X. M.2,3; Jiao, N.1,2; Shen, N.1,2; Ji, P. F.4
2014-06-01
Source PublicationSOIL & TILLAGE RESEARCH
Volume139Pages:23-27
AbstractMacromolecular polymers can effectively improve soil structure, increase soil penetration and control runoff and erosion on hillslopes. Simulated rainfall experiments on a bare soil investigated the impact of natural polymer derivatives (NPD) on soil properties and the characteristics of runoff and sediment yield of sheet erosion on experimental loessial hillslopes. A control (without NPD) and three concentrations of polymers (1,3 and 5 g/m(2)) were tested at rainfall intensities of 1, 1.5 and 2 mm/min and a slope gradient of 15 degrees. NPD effectively altered the onset, volume and sediment content of the runoff. Higher concentrations of NPD provided earlier onsets, lower depth and lower sediment contents of the runoff. Compared with control, cumulative runoffs decreased by 49-68%, 61-70% and 69-79% at concentrations of 1,3 and 5 g/m2 NPD, respectively, while cumulative erosion modulus decreased by 31-37%, 39-47%, 56-61%, respectively. Additionally, NPDs significantly increased the shear strength and the composition of aggregates from soil surface. Shear strength was 2.71, 3.24 and 4.01 times higher at 1, 3 and 5 g/m2, respectively, than in the controls. The percent mass of aggregates >0.25 mm increased to 52.5%, 62.65% and 73.0% from 8.9% in the control at the three respective concentrations. More research is needed to confirm the utility of NPDs in helping to control sheet erosion. (c) 2014 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordNpd Sheet Erosion Runoff Aggregate Shear Strength
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedAgriculture
WOS KeywordSPRINKLER IRRIGATION ; WATER INFILTRATION ; POLYACRYLAMIDE ; SOIL ; RUNOFF ; STABILITY
Indexed BySCI
Language英语
WOS SubjectSoil Science
WOS IDWOS:000334989100004
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68384
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Z. L.
Affiliation1.Northwest A&F Univ, Sch Resources & Environm, Yangling 712100, Peoples R China
2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Peoples R China
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
4.Solvay Res & Innovat Ctr, Solvay CNRS UMI 3464, Ecoefficient Prod & Proc Lab E2P2L, Shanghai 201108, Peoples R China
Recommended Citation
GB/T 7714
Liu, J. E.,Wang, Z. L.,Yang, X. M.,et al. The impact of natural polymer derivatives on sheet erosion on experimental loess hillslope[J]. SOIL & TILLAGE RESEARCH,2014,139:23-27.
APA Liu, J. E.,Wang, Z. L.,Yang, X. M.,Jiao, N.,Shen, N.,&Ji, P. F..(2014).The impact of natural polymer derivatives on sheet erosion on experimental loess hillslope.SOIL & TILLAGE RESEARCH,139,23-27.
MLA Liu, J. E.,et al."The impact of natural polymer derivatives on sheet erosion on experimental loess hillslope".SOIL & TILLAGE RESEARCH 139(2014):23-27.
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