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Hydraulic-based empirical model for sediment and soil organic carbon loss on steep slopes for extreme rainstorms on the Chinese loess Plateau

文献类型：期刊论文

作者He, JJ (reprint author), Capital Normal Univ, Base State Lab Urban Environm Proc & Digital Mode, Key Lab Informat Acquisit & Applicat 3D, Minist Educ, Beijing 100048, Peoples R China.; Huang, B.3; He, J. J.1; Nie, X. D.4,5; Li, Z. W.4,5; Liu, L.2,5; Chang, X. F.5; Liu, C.4,5; Xiao, H. B.5; Wang, D. Y.4
刊名JOURNAL OF HYDROLOGY
出版日期2017
卷号554页码:600-612
关键词Soc Loss Soil Erosion Simulated Rainfall Hydraulic Factor Model
ISSN号0022-1694
DOI10.1016/j.jhydrol.2017.09.010
文献子类Article
英文摘要Building a hydraulic-based empirical model for sediment and soil organic carbon (SOC) loss is significant because of the complex erosion process that includes gravitational erosion, ephemeral gully, and gully erosion for loess soils. To address this issue, a simulation of rainfall experiments was conducted in a 1 m x 5 m box on slope gradients of 15 degrees, 20 degrees, and 25 degrees for four typical loess soils with different textures, namely, Ansai, Changwu, Suide, and Yangling. The simulated rainfall of 120 mm h(-1) lasted for 45 min. Among the five hydraulic factors (i.e., flow velocity, runoff depth, shear stress, stream power, and unit stream power), flow velocity and stream power showed close relationships with SOC concentration, especially the average flow velocity at 2 m from the outlet where the runoff attained the maximum sediment load. Flow velocity controlled SOC enrichment by affecting the suspension-saltation transport associated with the clay and silt contents in sediments. In consideration of runoff rate, average flow velocity at 2 m location from the outlet, and slope steepness as input variables, a hydraulic-based sediment and SOC loss model was built on the basis of the relationships of hydraulic factors to sediment and SOC loss. Nonlinear regression models were built to calculate the parameters of the model. The difference between the effective and dispersed median diameter (050) or the SOC content of the original soil served as the independent variable. The hydraulic-based sediment and SOC loss model exhibited good performance for the Suide and Changwu soils, that is, these soils contained lower amounts of aggregates than those of Ansai and Yangling soils. The hydraulic-based empirical model for sediment and SOC loss can serve as an important reference for physical-based sediment models and can bring new insights into SOC loss prediction when serious erosion occurs on steep slopes. (c) 2017 Elsevier B.V. All rights reserved.
学科主题Engineering ; Geology ; Water Resources
URL标识查看原文
出版地AMSTERDAM
语种英语
WOS记录号WOS:000415769600044
出版者ELSEVIER SCIENCE BV
资助机构Chinese Academy of Sciences; National Natural Science Foundation of China [41271294] ; Chinese Academy of Sciences; National Natural Science Foundation of China [41271294] ; Chinese Academy of Sciences; National Natural Science Foundation of China [41271294] ; Chinese Academy of Sciences; National Natural Science Foundation of China [41271294]
源URL[http://ir.iswc.ac.cn/handle/361005/7893]  
专题水保所科研产出--SCI_2017--SCI
通讯作者He, JJ (reprint author), Capital Normal Univ, Base State Lab Urban Environm Proc & Digital Mode, Key Lab Informat Acquisit & Applicat 3D, Minist Educ, Beijing 100048, Peoples R China.; Li, ZW (reprint author), CAS & MWR, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.
作者单位1.Capital Normal Univ, Base State Lab Urban Environm Proc & Digital Mode, Key Lab Informat Acquisit & Applicat 3D, Minist Educ, Beijing 100048, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Guangdong Inst Ecoenvironm Technol, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China
4.Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
5.CAS & MWR, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 He, JJ ,Huang, B.,He, J. J.,et al. Hydraulic-based empirical model for sediment and soil organic carbon loss on steep slopes for extreme rainstorms on the Chinese loess Plateau[J]. JOURNAL OF HYDROLOGY,2017,554:600-612.
APA He, JJ .,Huang, B..,He, J. J..,Nie, X. D..,Li, Z. W..,...&Li, ZW .(2017).Hydraulic-based empirical model for sediment and soil organic carbon loss on steep slopes for extreme rainstorms on the Chinese loess Plateau.JOURNAL OF HYDROLOGY,554,600-612.
MLA He, JJ ,et al."Hydraulic-based empirical model for sediment and soil organic carbon loss on steep slopes for extreme rainstorms on the Chinese loess Plateau".JOURNAL OF HYDROLOGY 554(2017):600-612.

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来源：水土保持研究所

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