气候变化领域集成服务门户(CCPortal): Velocity measurement of water flow within gravel layer with electrolyte tracer method under virtual boundary condition

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DOI	10.1016/j.jhydrol.2015.05.008
	Velocity measurement of water flow within gravel layer with electrolyte tracer method under virtual boundary condition
	Shi, Xiaonan; Lei, Tingwu; Zhang, Fan; Yan, Yan
通讯作者	Shi, XN (通讯作者)
发表日期	2015
ISSN	0022-1694
EISSN	1879-2707
起始页码	387
结束页码	393
卷号	527
英文摘要	The measurement velocity of water flow along gravel-rich hill slope is of great interest for hydrological simulation and prediction in alpine watersheds. The alpine terrain is often covered by rock debris of different origin, size, and type, here summarized as 'gravel' for the sake of simplicity. To do this, water flow velocity within a gravel layer was measured using the electrolyte tracer method under virtual boundary conditions, an improved method over pulse electrolyte tracer method. Models employing two virtual boundary conditions, a sine function and a normal distribution function, are suggested as preferable for determining flow velocity by simulating the transport processes of electrolytes along a gravel-covered flume at different flow rates (3, 6, and 12 L min(-1)) and slope gradients (4, 8, and 12). Flow velocities as well as determination coefficients and mean square errors were calculated at five measurement locations (0.3, 0.6, 0.9, 1.2, and 1.5 m) using model simulation. The feasibility and accuracy of velocity measurements for water flow within gravel layers are justified to the extent that the two models fit well with the experimental data, the velocity values predicted by the two models are almost identical and, finally, the relations between velocity and discharge and between velocity and slope gradient are rationally explained. The estimated velocity results also agree well with those previously measured by commonly-used methods such as the pulse boundary method and the conventional dye tracer method. Our results show that the virtual boundary conditions method, when used to measure water flow velocity within a gravel layer, predicts the flow velocity more rationally than the pulse boundary and dye tracer methods, and with greater precision. This study suggests that this method is not only readily applicable for obtaining water flow velocity measurements within gravel layers, but also for understanding hydrodynamics in typical watershed. (C) 2015 Elsevier B.V. All rights reserved.
关键词	ROCK FRAGMENT COVER OVERLAND-FLOW SOIL-EROSION MAGNETIC TRACER ROUGH SURFACES HILLSLOPE ARIZONA RUNOFF GRADIENT SHEET
英文关键词	Flow velocity measurement; Gravel layer; Electrolyte tracer; Model simulation
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:000358629100034
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258441
推荐引用方式 GB/T 7714	Shi, Xiaonan,Lei, Tingwu,Zhang, Fan,et al. Velocity measurement of water flow within gravel layer with electrolyte tracer method under virtual boundary condition[J]. 中国科学院青藏高原研究所,2015,527.
APA	Shi, Xiaonan,Lei, Tingwu,Zhang, Fan,&Yan, Yan.(2015).Velocity measurement of water flow within gravel layer with electrolyte tracer method under virtual boundary condition.JOURNAL OF HYDROLOGY,527.
MLA	Shi, Xiaonan,et al."Velocity measurement of water flow within gravel layer with electrolyte tracer method under virtual boundary condition".JOURNAL OF HYDROLOGY 527(2015).