Modelling and analyzing flow diversion in branching channels with symmetric geometry

Yousefi, Saied; Ghiassi, Reza

doi:10.1002/rra.1393

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…Depending of the development of river, water quality may vary with the presence of a dam for example, reducing both sediments transportation and fauna distribution of derived zooplankton (Takao et al, 2008). River branching related to watershed topography, and its consequences on flowrate (Yousefi and Ghiassi, 2011) can also be considered local factor of water quality variation. Finally, floods frequency increase is a strong factor of water quality variation with pollutants and solids transportation and modification of flow routing (He et al, 2007).…”

Section: Hydrological Limits For Monitoring Relevancementioning

confidence: 99%

Variation of organic carbon and nitrate with river flow within an oceanic regime in a rural area and potential impacts for drinking water production

Baurès¹,

Delpla²,

Merel³

et al. 2013

Journal of Hydrology

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International audienceOver the last two decades, climate change has become a major environmental and public health concern due to the increase of the mean temperature on the Earth and its consequences on extreme meteorological events such as floods and droughts. These events induce very low or very high river flows that may impair surface water quality, and therefore result in potential health impacts when used for drinking water production. The present study aims at assessing the impact of hydrologic regime on surface water quality with a particular emphasis on total organic carbon (TOC) and nitrate. Water quality data from three French rivers acquired over a 27 years period, from January 1983 to December 2009, show the influence of extreme flows. Variation in TOC and nitrate concentrations showed opposite patterns for the whole range of flow rate (from less than 10% up to more than 100% of the mean flow). Regarding fluxes, TOC increased continuously with flow rate while nitrate was stable for very high discharges. The C/N ratio expressed from TOC and nitrate concentrations showed high values for extreme flows and particularly for very low flow rates, generally in summer, where nitrate is assimilated by biomass. Considering TOC and nitrate fluxes, it is confirmed that the worst situations were encountered for very high flow rates, namely for TOC exportation during surface runoff which was related to heavy rains or floods. These findings are of great importance with regard to the adaptation for drinking water treatment in facing extreme hydrological conditions, of which the frequency is increasing with climate change

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Section: Hydrological Limits For Monitoring Relevancementioning

confidence: 99%

Variation of organic carbon and nitrate with river flow within an oceanic regime in a rural area and potential impacts for drinking water production

Baurès¹,

Delpla²,

Merel³

et al. 2013

Journal of Hydrology

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show abstract

“…Other applications of one-dimensional open-channel flow models include longterm simulations [16], river network modeling [10], flood predictions and similar hydraulic engineering problems. Despite the fact that these models are widespread, their proper calibration still presents a major challenge [8,9,25]. Castellarin et al [3] discussed useful guidelines for identification of the geometric description of natural rivers [3].…”

Section: Introductionmentioning

confidence: 99%

Development, Calibration and Verification of a 1-D Flow Model for a Looped River Network

Horvat

Isic³

2016

Environ Model Assess

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This paper presents the development, calibration and verification of a looped river network model. After introducing the governing equations, the established numerical model is calibrated employing measurements conducted on the Danube River and its two main tributaries in Serbia, the Sava and Tisa rivers. The calibration is done by altering the Strickler's coefficient using three different approaches, assigning a constant value of the coefficient in a cross section, setting the coefficient as a function of discharge and, finally, connecting the Strickler's coefficient to local depth. The verification is conducted by comparing the computed results, for all three of the considered methods, with measurements for the time interval from January 1st to December 31st of the year 2006. Careful examination of the obtained results helped to select the most suitable calibration method for future reference. The selected approach gave better agreement of computed and measured values, has a clear physical explanation and enables faster and easier calibration.

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“…These hydrodynamic phenomena affect withdrawal efficacy. They are closely related to the withdrawal conditions (He et al 2021b) and water intake structure parameters (Yousefi et al 2010;Shen et al 2020), such as the intake width depth ratio, withdrawal angle, intake type and water diversion ratio. Effects of bank slope on the flow patterns in river intakes were studied, and it was found that the inclining bank causes the bottom stream tube width to be greater than at the surface (Seyedian et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic characteristics of lateral withdrawal with effects of the slope ratio

Zhao

Zhang

et al. 2021

Journal of Water Supply: Research and Technology-Aqua

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Lateral withdrawal is widely performed in water transfer and water supply projects. Hydrodynamic characteristics of intake are crucial to safe and stable operation. In this study, a 3-D numerical volume of fluid model was established and validated through experimental tests. Hydrodynamic characteristics and secondary flow were investigated under scenarios with the vertical slope and different slope ratios. The helix-shaped recirculation and surface vortex are generated, and the secondary flow near the surface layer is more serious. Adding a slope ratio is beneficial to improve the flow patterns and recirculation, while the surface vortex width increases. Additionally, with the decrease in the slope ratio, recirculation width and the ratio of recirculation to the width of the layer decrease, and the minimum values are 9.19 cm and 22.97%, respectively. However, the lower the slope ratio is, the greater recirculation inhibition affects are, and the more serious the surface vortex is. With the decrease in the slope ratio, the widest surface vortex width and the ratio of the widest surface vortex to the width of the layer increase from 6.1 to 12 cm and from 7.82 to 17.14%, respectively. This research represents an advance in lateral withdrawal and provides support for further designs.

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Modelling and analyzing flow diversion in branching channels with symmetric geometry

Cited by 8 publications

References 6 publications

Variation of organic carbon and nitrate with river flow within an oceanic regime in a rural area and potential impacts for drinking water production

Variation of organic carbon and nitrate with river flow within an oceanic regime in a rural area and potential impacts for drinking water production

Development, Calibration and Verification of a 1-D Flow Model for a Looped River Network

Hydrodynamic characteristics of lateral withdrawal with effects of the slope ratio

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