IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Impact of tillage erosion on water erosion in a hilly landscape
Wang, Y.1,2,3; Zhang, J. H.1,2; Zhang, Z. H.1,2; Jia, L. Z.1,2
Corresponding AuthorZhang, J. H.
2016
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
Volume551Pages:522-532
SubtypeArticle
AbstractLittle has been known of the interaction between tillage erosion and water erosion, while the two erosion processes was independently studied. Can tillage-induced soil redistribution lead to exaggerated (or retarded) runoff flow and sediment concentrations in steeply sloping fields? A series of simulated tillage and artificial rainfall events were applied to rectangular runoff plots (2 m x 8 m) with a slope of 15 degrees to examine the impacts of tillage erosion intensities on water erosion in the Yangtze Three Gorges Reservoir Area, China. Mean flowvelocity, effective/critical shear stress, and soil erodibility factor K were calculated to analyze the differences in hydrodynamic characteristics induced by tillage. Our experimental results suggest that mean runoff rates were 2.26, 1.19, and 0.65 L min(-1) and that mean soil detachment rates were 1.53, 1.01, and 0.61 g m(-2) min(-1) during the 70-min simulated rainfall events for 52-, 31-, and 10-year tillage, respectively. A significant difference (P < 0.05) in cumulative detachment amounts was found among different tillage intensities. Compared with the soil flux of 0 kg m(-1), cumulative detachment amounts for the soil fluxes of 9.86 and 24.72 kg m(-1) increased by 40.02% and 100.94%, respectively, during the 30-min rainfall event. The results imply that soil and water losses tended to increase with increasing tillage intensity. A significant difference in mean flow velocity occurred near the upper and lower slope boundaries of the field, while significant differences (P < 0.05) in runoff depth and effective shear stress were observed among different slope positions. Soil erodibility factor K for the soil fluxes of 9.86 and 24.72 kg m(-1) were 2.40 and 5.11 times higher, respectively, than that for the soil flux of 0 kg m(-1). As tillage intensity increased, critical shear stress trended to gradually decrease for all soil fluxes. Our results indicate that tillage erosion increases soil erodibility and delivers the soil for water erosion in sloping fields, accelerating water erosion. (C) 2016 Elsevier B.V. All rights reserved.
KeywordWater Erosion Hydrodynamic Characteristic Tillage Erosion Landscape Position
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.scitotenv.2016.02.045
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordSOIL SHEAR-STRENGTH ; CONSERVATION TILLAGE ; RAINFALL CONDITIONS ; SIMULATED RAINFALL ; STEEP HILLSLOPE ; SEDIMENT YIELD ; REDISTRIBUTION ; RUNOFF ; CHINA ; TRANSLOCATION
Language英语
Quartile2区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000372589800055
Funding OrganizationNational Basic Research Program of China(2015CB452704) ; National Natural Science Foundation of China(41571267) ; 135 Strategic Program of the Institute of Mountain Hazards and Environment, CAS(SDS-135-1206)
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17381
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,Renmin South Rd,POB 417, Chengdu 610041, Peoples R China
2.Minist Water Conservancy & Power, 9,Block 4,Renmin South Rd,POB 417, Chengdu 610041, Peoples R China
3.Sichuan Agr Univ, Coll Water Conservancy & Hydropower Engn, Yaan 625014, Peoples R China
Recommended Citation
GB/T 7714
Wang, Y.,Zhang, J. H.,Zhang, Z. H.,et al. Impact of tillage erosion on water erosion in a hilly landscape[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016,551:522-532.
APA Wang, Y.,Zhang, J. H.,Zhang, Z. H.,&Jia, L. Z..(2016).Impact of tillage erosion on water erosion in a hilly landscape.SCIENCE OF THE TOTAL ENVIRONMENT,551,522-532.
MLA Wang, Y.,et al."Impact of tillage erosion on water erosion in a hilly landscape".SCIENCE OF THE TOTAL ENVIRONMENT 551(2016):522-532.
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