New Stage-Discharge Relationships for Radial Gates

Bijankhan, M.; Ferro, Vito; Kouchakzadeh, S.

doi:10.1061/(asce)ir.1943-4774.0000556

Cited by 34 publications

(28 citation statements)

References 24 publications

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“…Higher values for EF and lower values for ME, MAE, RMSE and CRM indicate a high estimation accuracy of the discharge exiting from all three types of radial gates when Equation 29 is used. Also, the method proposed by Bijankhan et al (2013), Wahl (2005) and Clemmens et al (2003) gives a good accuracy in flow discharge estimation. However, since the proposed equation by Clemmens et al (2003) is lacking the effects of gate seal type, it is not recommended to be used for calculating the discharge coefficient of the hard rubber bar gate.…”

Section: Number Of Testsmentioning

confidence: 95%

“…Equations 29 and 31 were developed for submerged and free flow conditions, respectively. Therefore, there is a gap in the estimation of the discharge coefficient at the transition zone (flow occurred between free and submerged conditions) which was considered by Bijankhan et al (2013).…”

Section: Submerged Flow Conditionsmentioning

confidence: 99%

“…Based on Buyalski's (Buyalski, 1983) data for three types of the gates, the proposed relation was compared with Clemmens et al (2003), Wahl (2005), Shahrokhnia and Javan (2003), Shahrokhnia and Javan (2006), Zahedani et al (2012) and Bijankhan et al (2013). The values of maximum error (ME), mean absolute error (MAE), root mean square error (RMSE), coefficient of residual mass (CRM) and efficiency factor (EF) were computed and used for comparison.…”

Section: Number Of Testsmentioning

confidence: 99%

“…Bijankhan et al (2013) later developed the stage-discharge equation to determine the discharge of radial gates. Their proposed equations could give a continuous estimation of the discharge of flow changing from free to submerged conditions.…”

mentioning

confidence: 99%

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Effective parameters for calculating discharge of radial gates

Shayan¹,

Frounchi²,

Roshan³

2015

Proceedings of the Institution of Civil Engineers - Water Manag

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This study presents some theoretical relationships to estimate the discharge exiting from various types of radial gates under free and submerged flow conditions. These equations, which are based on energy and momentum concepts, were calibrated by means of a large number of experimental records retrieved from research conducted on three types of radial gates: hard rubber bar, sharp and music note gates. Results showed that the proposed equations could more accurately estimate the discharge of these radial gates where the mean absolute relative errors were less than 1 . 5 and 3 . 5% for free and submerged flow conditions, respectively. It was also observed that under specific circumstances, a hard rubber bar gate permits more discharge than sharp and music note gates. It is recognised that the discharge coefficient decreases with increase of lip angle. The reliability of the proposed equations was tested using 514 field data of multi-radial gates under operation in different irrigation canals. The study showed that calculating the total discharge exiting from individual gates by means of proposed equations was in close agreement with field observations. The predictive errors of the total flow discharge for 78% of the flow data were about 610%.

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Section: Number Of Testsmentioning

confidence: 95%

Section: Submerged Flow Conditionsmentioning

confidence: 99%

Section: Number Of Testsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Effective parameters for calculating discharge of radial gates

Shayan¹,

Frounchi²,

Roshan³

2015

Proceedings of the Institution of Civil Engineers - Water Manag

View full text Add to dashboard Cite

show abstract

“…Although a sound background can be found in the literature for both free and submerged single sluice/radial gates [e.g. 2,3,4,5,6,7,8,9,10,11] very limited studies on sluice or radial gates installed in parallel exist. Nago and Furukawa [12] conducted some experiments in a channel having a sudden expansion with negative vertical step, lateral expansion, and both lateral expansions and negative step.…”

Section: Introductionmentioning

confidence: 99%