An approximate analytical solution for describing surface runoffand sediment transport over hillslope
文献类型：期刊论文
| 作者 | Tao, WH(Tao, Wanghai)2; Lin, H(Lin, Henry)2,4; Wang, Quanjiu; Wang, QJ(Wang, Quanjiu)2,3 |
| 刊名 | Journal of Hydrology
 |
| 出版日期 | 2018-03 |
| 卷号 | 558期号:2018页码:496-508 |
| 关键词 | Overland Flow Soil Erosion Approximate Analytical Solution Natural Rainfall |
| 文献子类 | 期刊论文 |
| 英文摘要 | 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. |
| 项目编号 | 51239009 ; 05149212 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.ieecas.cn/handle/361006/5255]  |
| 专题 | 地球环境研究所_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.Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, PA 16802, USA 2.State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an 710048, China 3.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 4.State Key Laboratory of Loess and Quaternary Geologly, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China |
| 推荐引用方式 GB/T 7714 | Tao, WH,Lin, H,Wang, Quanjiu,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,Lin, H,Wang, Quanjiu,&Wang, QJ.(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. |
入库方式： OAI收割
来源：地球环境研究所
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