干旱区生态环境知识资源中心(Arid): A 2D hydrodynamic model for shallow water flows with significant infiltration losses

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DOI	10.1002/hyp.13722
	A 2D hydrodynamic model for shallow water flows with significant infiltration losses
	Ni, Yufang 1; Cao, Zhixian 1; Liu, Qing 1; Liu, Qingquan 2
通讯作者	Ni, Yufang
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2020
卷号	34 期号:10 页码:2263-2280
英文摘要	Infiltration losses may be significant and warrant proper incorporation into mathematical models for river floods in arid and semi-arid areas, rainfall-induced surface runoffs in watersheds and swashes on beaches. Here, a depth-averaged two-dimensional hydrodynamic model is presented for such processes based on the cell-centred finite volume method on unstructured meshes, with the full Green-Ampt equation evaluating the infiltration rate. A local time stepping strategy is employed along with thread parallelization with Open Multi-processing and high-performance computing to reduce model run time and therefore facilitate applications for large-scale processes. The numerical solutions generally agree with the experimental and field-measured data for typical cases with significant infiltration losses. The case study shows that neglecting infiltration leads to an overestimated discharge hydrograph, which cannot be compensated by means of varied bed resistance as estimated by Manning roughness, and the infiltration parameters play disparate roles in modifying shallow flows compared with Manning roughness. In addition, infiltration affects bed shear stress, which in turn modifies the critical bed sediment size that could be initiated for incipient motion by the flow and therefore needs to be properly accounted for when sediment transport and morphological evolution are to be resolved.
英文关键词	hydrodynamic model infiltration loss river flood surface runoff swash
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000516472500001
WOS关键词	DRIVEN SWASH HYDRODYNAMICS ; TRANSMISSION LOSSES ; EPHEMERAL CHANNELS ; FLOOD SIMULATION ; SCALING ANALYSIS ; FLASH FLOODS ; TIME ; EXFILTRATION ; CALIBRATION ; ALGORITHM
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314688
作者单位	1.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Peoples R China; 2.Beijing Inst Technol, Dept Mech, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Ni, Yufang,Cao, Zhixian,Liu, Qing,et al. A 2D hydrodynamic model for shallow water flows with significant infiltration losses[J],2020,34(10):2263-2280.
APA	Ni, Yufang,Cao, Zhixian,Liu, Qing,&Liu, Qingquan.(2020).A 2D hydrodynamic model for shallow water flows with significant infiltration losses.HYDROLOGICAL PROCESSES,34(10),2263-2280.
MLA	Ni, Yufang,et al."A 2D hydrodynamic model for shallow water flows with significant infiltration losses".HYDROLOGICAL PROCESSES 34.10(2020):2263-2280.