Parshall flumes flow rate uncertainty including contributions of the model parameters and correlation effects

Ribeiro, A.; Sousa, João A.; Simões, Catarina; Martins, L. Lages; Dias, L. A. V.; Mendes, R.; Martins, Catarina

doi:10.1016/j.measen.2021.100108

Cited by 6 publications

(9 citation statements)

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“…Streamflow discharge, as a volume of water per unit of time passing through a known cross-sectional area, can be measured directly and with low uncertainty by measuring stage at a channel-spanning weir (less than 2% under ideal conditions; Horton [1907], within 5% for calibrated broad-crested weirs; Church et al [1999]) or in-channel flow constriction structures such as a Parshall flumes (about 5% to 8% when considering total measuring uncertainties; Church et al, 1999;Ribeiro et al, 2021). However, these expensive and intensive approaches are typically limited to highlyinstrumented, small, experimental catchments.…”

Section: In-stream Measurementsmentioning

confidence: 99%

Uncertainties in measuring and estimating water‐budget components: Current state of the science

et al. 2023

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Reducing uncertainty in quantifying basin‐scale water‐budget components is one of the most vexing problems for water‐resource managers. Although a vast literature addresses methods and scales of component estimates, uncertainty associated with these estimates is often lacking. Here we review sources of uncertainty and compile reported uncertainty estimates for measurement and estimation methods for six water‐budget components: precipitation, streamflow, evapotranspiration, subsurface discharge, infiltration, and recharge. Quantifying the uncertainty in each water‐budget component data is required before total water‐budget uncertainty can be determined. This article is categorized under: Science of Water > Hydrological Processes Science of Water > Methods

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Section: In-stream Measurementsmentioning

confidence: 99%

Uncertainties in measuring and estimating water‐budget components: Current state of the science

et al. 2023

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“…Flumes are commonly used to measure flow for various monitoring settings, such as field runoff, stormwater, municipal storm sewers, dam seepage discharge, industrial effluent discharge, watershed monitoring, irrigation canal discharge, ditch and furrow discharge, spring discharge, mine discharge, and stream gauging (Tekade et al, 2016, Heyrani et al, 2022Luxmi et al, 2022;Heiner and Barfuss, 2011;Marr et al, 2010;USBR, 2001;Todeschini et al, 2020;Ribeiro et al, 2021).…”

Section: Field Application Of Flumesmentioning

confidence: 99%

“…Parshall flumes are sized by throat width, according to USBR (2001), the throat width sizes range from 2.54 to 1524 cm. (Ribeiro et al, 2021). Slika 2: Tloris in vzdolžni prerez Parshallovega korita (Ribeiro et al, 2021).…”

Section: Parshall Flumementioning

confidence: 99%

Review of hydraulic performance of open‐channel flow‐measuring flumes

Sibale,

Adongo,

Umkiza

et al. 2023

Acta Hydrotechnica

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The review explored various flumes used for open channel flow measurement and provided insight into operational concepts, discharge measurement, range of flow, head loss requirements, degree of accuracy and submergence, advantages, and limitations for use. The reviewed flumes included; Parshall flumes, Montana flumes, Cutthroat flumes, H-flumes, Trapezoidal flumes, Replogle-Bos-Clemmens (RBC) flumes, Palmer-Bowlus flumes and Central Baffle flumes (CBF). Based on the stage and discharge relationship, the reviewed flumes have a reasonable accuracy of ± 10 % over a wide range of flows. RBC flumes are the most accurate flumes (± 2 %). For flows that deal with a lot of sediments, most flumes have self-cleaning capability except for Palmer-Bowlus flumes and Central Baffle flumes. H-flumes have low resistance to submergence. The submergence transition for H-flumes is only 25-30 %. RBC flumes and Palmer-Bowlus flumes have the highest submergence (90 %). CBF and Palmer-Bowlus flumes need to be improved in order to have self-cleaning capability. Submerged flow corrections need to be developed and published for Palmer-Bowlus flumes and RBC flumes. The reviewed flumes effectively operate with a minimal head loss. The review has provided an insight on selection of an appropriate type of flume for flow measurement in open channels.

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“…Ref. [33] worked on the determination of uncertainty in flow rate measurement with Parshall channels. They used the Monte Carlo Method (MCM).…”

Section: Experimental Studiesmentioning

confidence: 99%

Application of Numerical and Experimental Modeling to Improve the Efficiency of Parshall Flumes: A Review of the State-of-the-Art

et al. 2022

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One of the primary steps in managing the flow in an open channel is determining its properties. Empirical equations are developed to provide further information regarding the flow in open channels. Obtaining such experimental equations is expensive and time consuming; therefore, alternative solutions have been sought. Over the last century, the Parshall flume, a static measuring device with no moving parts, has played a significant role in measuring the flow in open channels. Many researchers have focused their interest on studying the application of Parshall flumes in various fields like irrigation and wastewater management. Although various scholars used experimental results to enhance the rating equation of the Parshall flume, others used an alternative source of data to recalibrate the height–discharge relation equation using numerical simulation. Computational Fluid Dynamic (CFD) software is becoming popular nowadays as computing hardware has advanced significantly within the last few decades, making it possible to go beyond the limited resolution that was experienced in the past. Multiple CFD models, depending on their availability, either open-source or commercially licensed, have been used to perform numerical simulations on different configurations of flumes, especially Parshall flumes, to produce water level results. Regarding various CFD tools that have been used, i.e., FLOW-3D, Ansys Fluent, or OpenFOAM, after precise calibration with experimental data, it has been determined that the output is reliable and can be implemented to the actual scenarios. The benefit of using this technique to produce results is the ability of the CFD approach to adjust the initial conditions, like flow velocity or structural geometry, where necessary. With respect to channel size and the condition of the site where the flume is located, the choices are narrowed to the specific Parshall flume suitable to the situation. It is not always possible to select the standard Parshall flume; therefore, engineers provide some modification to the closest flume size and provide a new rating curve to produce accurate flowrates. This review has been performed on the works of a number of scholars who targeted the application of numerical simulation and physical experimental data in Parshall flumes to either enhance the existing rating equation or propose further modification to the structure’s geometry.

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Parshall flumes flow rate uncertainty including contributions of the model parameters and correlation effects

Cited by 6 publications

References 0 publications

Uncertainties in measuring and estimating water‐budget components: Current state of the science

Uncertainties in measuring and estimating water‐budget components: Current state of the science

Review of hydraulic performance of open‐channel flow‐measuring flumes

Application of Numerical and Experimental Modeling to Improve the Efficiency of Parshall Flumes: A Review of the State-of-the-Art

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