An approximate analytical solution for describing surface runoff and sediment transport over hillslope
Tao, Wanghai1; Wang, Quanjiu1,2; Lin, Henry1,3,4
2018-03-01
发表期刊JOURNAL OF HYDROLOGY
卷号558期号:2页码:496-508
文章类型Article
摘要Soil and water loss from farmland causes land degradation and water pollution, thus continued efforts are needed to establish mathematical model for quantitative analysis of relevant processes and mechanisms. In this study, an approximate analytical solution has been developed for overland flow model and sediment transport model, offering a simple and effective means to predict overland flow and erosion under natural rainfall conditions. In the overland flow model, the flow regime was considered to be transitional with the value of parameter beta (in the kinematic wave model) approximately two. The change rate of unit discharge with distance was assumed to be constant and equal to the runoff rate at the outlet of the plane. The excess rainfall was considered to be constant under uniform rainfall conditions. The overland flow model developed can be further applied to natural rainfall conditions by treating excess rainfall intensity as constant over a small time interval. For the sediment model, the recommended values of the runoff erosion calibration constant (c(r)) and the splash erosion calibration constant (c(f)) have been given in this study so that it is easier to use the model. These recommended values are 0.15 and 0.12, respectively. Comparisons with observed results were carried out to validate the proposed analytical solution. The results showed that the approximate analytical solution developed in this paper closely matches the observed data, thus providing an alternative method of predicting runoff generation and sediment yield, and offering a more convenient method of analyzing the quantitative relationships between variables. Furthermore, the model developed in this study can be used as a theoretical basis for developing runoff and erosion control methods. (C) 2018 Elsevier B.V. All rights reserved.
关键词Overland Flow Soil Erosion Approximate Analytical Solution Natural Rainfall
WOS标题词Science & Technology ; Technology ; Physical Sciences
DOI10.1016/j.jhydrol.2018.01.054
关键词[WOS]KINEMATIC FLOW APPROXIMATION ; SAINT-VENANT EQUATIONS ; SOIL-EROSION MODEL ; OVERLAND-FLOW ; RAINFALL INTENSITY ; SIMULATED RAINFALL ; GROUNDWATER-FLOW ; WATER EROSION ; SLOPE LENGTH ; WAVE MODEL
收录类别SCI
语种英语
WOS研究方向Engineering ; Geology ; Water Resources
WOS类目Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号WOS:000427338900040
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5212
专题黄土与第四纪地质国家重点实验室(2010~)
作者单位1.Xian Univ Technol, State Key Lab Base Ecohydraul Engn Arid Area, Xian 710048, Shaanxi, Peoples R China
2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Xian 712100, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geologly, Xian, Shaanxi, Peoples R China
4.Penn State Univ, Dept Ecosyst Sci & Management, University Pk, PA 16802 USA
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Tao, Wanghai,Wang, Quanjiu,Lin, Henry. An approximate analytical solution for describing surface runoff and sediment transport over hillslope[J]. JOURNAL OF HYDROLOGY,2018,558(2):496-508.
APA Tao, Wanghai,Wang, Quanjiu,&Lin, Henry.(2018).An approximate analytical solution for describing surface runoff and sediment transport over hillslope.JOURNAL OF HYDROLOGY,558(2),496-508.
MLA Tao, Wanghai,et al."An approximate analytical solution for describing surface runoff and sediment transport over hillslope".JOURNAL OF HYDROLOGY 558.2(2018):496-508.
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