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DOI	10.1016/j.advwatres.2019.103503
	Experiments, analytical and HYDRUS2D modeling of steady jet of quasi-normal surface flow in rectangular channel coupled with vertical seepage: Vedernikov-Riesenkampf's legacy revisited
	Al-Shukaili A.; Al-Busaidi H.; Kacimov A.R.
发表日期	2020
ISSN	0309-1708
卷号	136
英文摘要	Channels are widely used for conveying natural flash floods or managed aquifer recharge (MAR) released treated wastewater. Adequate models are needed for describing the interaction between hydraulics of surface flow downslope the channel and vertical seepage into a porous bed for evaluation of the depth of water and the length to which surface water “jet” propagates over a porous bed. Experiments with surface “jets” (consumed by bed infiltration) are compared with numerical and analytical modeling of these coupled flows. In the field (Al-Hail site, Oman), at a pedestal and slope of a dune, two rectangular trenches had a sand bed and a mild and steep slope S (3° and 25°, correspondingly). After applying constant discharges at the inlet of the trenches, the length, L, of the water “jets” propagating until complete extinction has been measured. The wetting front into the subjacent sand has been detected by measuring the volumetric soil moisture content at different depths in an excavation, immediately after termination of discharging the surface water. Analytically (by the hodograph method), 2-D steady phreatic seepage flow from a rectangular channel was examined as a special case of Vedernikov's solution for a soil without capillarity. Since the depth of water was small, the Riesenkampf analytical solution, involving capillarity in the tension-saturated flanks of the channel, has been also utilized. Numerically, Richard's equation has been solved by a finite element method, HYDRUS2D for arbitrary soils. The boundary condition was a hydrostatic pressure head along the wetted perimeters of the channels with water depth gradually dropping downslope. Coupling of surface and subsurface flows has been done by the “kinematic waves” approximation with Manning's friction slope equal to S. In the ODE for conservation of mass, the sink term (infiltration) was computed by either HYDRUS or analytical solution. The corresponding boundary value problem was solved by computer algebra routines. © 2020 Elsevier Ltd
关键词	Algebra Aquifers Boundary value problems Capillarity Hydraulics Hydrostatic pressure Kinematics Precipitation (meteorology)Recharging (underground waters)Seepage Soil moisture Surface waters Wastewater treatment Conservation of mass HYDRUS-2D Managed aquifer recharges Phreatic surface Rectangular channel Subsurface Flow Surface and subsurface flow Volumetric soil moisture contents Wetting analytical method aquifer computer simulation experimental study phreatic zone porous medium seepage subsurface flow two-dimensional modeling Oman
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131859
推荐引用方式 GB/T 7714	Al-Shukaili A.,Al-Busaidi H.,Kacimov A.R.. Experiments, analytical and HYDRUS2D modeling of steady jet of quasi-normal surface flow in rectangular channel coupled with vertical seepage: Vedernikov-Riesenkampf's legacy revisited[J]. Advances in Water Resources,2020,136.
APA	Al-Shukaili A.,Al-Busaidi H.,&Kacimov A.R..(2020).Experiments, analytical and HYDRUS2D modeling of steady jet of quasi-normal surface flow in rectangular channel coupled with vertical seepage: Vedernikov-Riesenkampf's legacy revisited.,136.
MLA	Al-Shukaili A.,et al."Experiments, analytical and HYDRUS2D modeling of steady jet of quasi-normal surface flow in rectangular channel coupled with vertical seepage: Vedernikov-Riesenkampf's legacy revisited".136(2020).