Impact of tillage erosion on water erosion in a hilly landscape
文献类型：期刊论文
| 作者 | Wang, Y.1,2,3 ; Zhang, J. H.1,2; Zhang, Z. H.1,2; Jia, L. Z.1,2
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2016-05-01 |
| 卷号 | 551页码:522-532 |
| 关键词 | Water erosion Hydrodynamic characteristic Tillage erosion Landscape position |
| ISSN号 | 0048-9697 |
| 通讯作者 | Zhang, J. H. |
| 英文摘要 | Little 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. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Environmental Sciences |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | SOIL SHEAR-STRENGTH ; CONSERVATION TILLAGE ; RAINFALL CONDITIONS ; SIMULATED RAINFALL ; STEEP HILLSLOPE ; SEDIMENT YIELD ; REDISTRIBUTION ; RUNOFF ; CHINA ; TRANSLOCATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000372589800055 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/17381]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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