An approximate analytical solution for describing surface runoffand sediment transport over hillslope

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	An approximate analytical solution for describing surface runoffand sediment transport over hillslope
	Tao, WH(Tao, Wanghai)1; Wang, QJ(Wang, Quanjiu)1,2; Lin, H(Lin, Henry)1,3; Wang, Quanjiu
	2018-03
发表期刊	Journal of Hydrology
卷号	558 期号:2018 页码:496-508
文章类型	期刊论文
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 β (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 (cr) and the splash erosion calibration constant (cf) 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.
关键词	Overland Flow Soil Erosion Approximate Analytical Solution Natural Rainfall
收录类别	SCI
所属项目编号	51239009 ; 05149212
项目资助者	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/5255
专题	黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Wang, Quanjiu
作者单位	1.State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an 710048, China 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Xi’an 712100, China 3.State Key Laboratory of Loess and Quaternary Geologly, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China 4.Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, PA 16802, USA
推荐引用方式 GB/T 7714	Tao, WH,Wang, QJ,Lin, H,et al. An approximate analytical solution for describing surface runoffand sediment transport over hillslope[J]. Journal of Hydrology,2018,558(2018):496-508.
APA	Tao, WH,Wang, QJ,Lin, H,&Wang, Quanjiu.(2018).An approximate analytical solution for describing surface runoffand sediment transport over hillslope.Journal of Hydrology,558(2018),496-508.
MLA	Tao, WH,et al."An approximate analytical solution for describing surface runoffand sediment transport over hillslope".Journal of Hydrology 558.2018(2018):496-508.

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