Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR020055 |
An efficient and stable hydrodynamic model with novel source term discretization schemes for overland flow and flood simulations | |
Xia, Xilin1; Liang, Qiuhua1; Ming, Xiaodong1; Hou, Jingming1,2 | |
2017-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Peoples R China |
英文摘要 | Numerical models solving the full 2-D shallow water equations (SWEs) have been increasingly used to simulate overland flows and better understand the transient flow dynamics of flash floods in a catchment. However, there still exist key challenges that have not yet been resolved for the development of fully dynamic overland flow models, related to (1) the difficulty of maintaining numerical stability and accuracy in the limit of disappearing water depth and (2) inaccurate estimation of velocities and discharges on slopes as a result of strong nonlinearity of friction terms. This paper aims to tackle these key research challenges and present a new numerical scheme for accurately and efficiently modeling large-scale transient overland flows over complex terrains. The proposed scheme features a novel surface reconstruction method (SRM) to correctly compute slope source terms and maintain numerical stability at small water depth, and a new implicit discretization method to handle the highly nonlinear friction terms. The resulting shallow water overland flow model is first validated against analytical and experimental test cases and then applied to simulate a hypothetic rainfall event in the 42 km(2) Haltwhistle Burn, UK. |
英文关键词 | overland flows shallow water equations surface reconstruction method implicit friction term discretization finite volume Godunov-type scheme |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403712100016 |
WOS关键词 | SHALLOW-WATER EQUATIONS ; HYPERBOLIC CONSERVATION-LAWS ; WELL-BALANCED SCHEME ; HYDROSTATIC RECONSTRUCTION ; UNSTRUCTURED MESHES ; TOPOGRAPHY ; SURFACE ; SYSTEM ; RELAXATION ; LIMITATION |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21191 |
专题 | 资源环境科学 |
作者单位 | 1.Newcastle Univ, Sch Civil Engn & Geosci, Newcastle Upon Tyne, Tyne & Wear, England; 2.Xian Univ Technol, Sch Water Resources & Hydropower Engn, Xian, Peoples R China |
推荐引用方式 GB/T 7714 | Xia, Xilin,Liang, Qiuhua,Ming, Xiaodong,et al. An efficient and stable hydrodynamic model with novel source term discretization schemes for overland flow and flood simulations[J]. WATER RESOURCES RESEARCH,2017,53(5). |
APA | Xia, Xilin,Liang, Qiuhua,Ming, Xiaodong,&Hou, Jingming.(2017).An efficient and stable hydrodynamic model with novel source term discretization schemes for overland flow and flood simulations.WATER RESOURCES RESEARCH,53(5). |
MLA | Xia, Xilin,et al."An efficient and stable hydrodynamic model with novel source term discretization schemes for overland flow and flood simulations".WATER RESOURCES RESEARCH 53.5(2017). |
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