Evaluation of bed load equations using field measured bed load and bed material load

Yadav, Shivendra; Yadav, Vipin K.; Gilitwala, Anurag

doi:10.1080/09715010.2019.1594417

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…The discrepancy ratio is the comparison between the computed and measured stable channel geometry. The acceptable range of DR values is between 0.5 and 2.0 (Julien & Wargadalam 1995;Lee & Julien 2007;Hadadin 2017), 0.5 and 1.5 (Afzalimehr et al 2010), 0.8 and 1.2 (Abdelhaleem et al 2016;Shaghaghi et al 2018;Gholami et al 2019b), 0.9 and 1.1 (Gholami et al 2017) and the perfect correlation of computed and measured stable channel geometry should be one (Yadav et al 2019). This study uses a DR of 0.8-1.2 (20% accuracy) to analyse the prediction model in multiple linear regression (MLR).…”

Section: Goodness Of Fit Of Model Performancementioning

confidence: 98%

GEP- and MLR-based equations for stable channel analysis

Harun

Ghani

Mohammadpour

et al. 2021

Journal of Hydroinformatics

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For decades, research on stable channel hydraulic geometry was based on the following parameters: river discharge, dimensionless discharge, the median size of bed material and the slope. Although significant research has been conducted in this area, including applied machine learning to increase the geometry model prediction accuracy, there has been no remarkable improvement as the variables used to describe the geometry relationship remain the same. The novelty of this study is demonstrated by the parameters used in the stable channel geometry equations that outperform the existing equation's accuracy. In this research, sediment transport parameters are introduced and analysed by applying the multiple linear regression (MLR) and gene expression programming (GEP) methods. The new equation of the width, depth and bed slope can give much-improved results in efficiency and lower errors. Furthermore, a new parameter B/y is introduced in this study to solve the restriction issue, either in width or depth prediction. The results from MLR and GEP show that in addition to the existing hydraulic geometry parameter, the B/y parameter is also able to give high accuracy results for width and depth predictions. Both calibration and validation for the B/y parameter yield high R2 and NSE values with low mean squared errors and mean absolute errors.

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Section: Goodness Of Fit Of Model Performancementioning

confidence: 98%

GEP- and MLR-based equations for stable channel analysis

Harun

Ghani

Mohammadpour

et al. 2021

Journal of Hydroinformatics

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show abstract

“…Additionally, sediment is deposited upstream of the structure, leaving a resource deficiency downstream]4[. Since a large portion of the sediment load comes from the channel's bottom and sides, rivers that flow through soft material often have higher sediment loads than rivers exposed to bedrock [5,6].…”

Section: Introductionmentioning

confidence: 99%

Hydraulic Model Prediction of the Total Load of Sediment Transport in The Euphrates River at The Upstream Ramadi Barrage

Hammad,

Sulaiman

2023

E3S Web Conf.

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Examining river engineering properties and bed erosion is one of the most challenging but crucial issues in river engineering and sediment hydraulics, so preventing erosion and sedimentation is one of the primary goals of river management and prediction of river behavior. This research aims to give hydraulic engineers and decision-makers an accurate and dependable sediment transport equation that could be utilized to govern river engineering and modify river morphology. This study evaluated the carried sediments and their estimated quantity upstream of the Ramadi Barrage on the Euphrates River in the Anbar area of western Iraq. Six formulas, including Yang, Shen, Hung, Ackers and White, Engelund and Hansen, and Bagnold's and Toffaleti's, were used to evaluate the applicability of sediment transport in the study area. The performance of these models was assessed based on the precision of the actual sediment load relative to a specified deviation ratio. The analyses indicated that the Engelund-Hansen formula is the most applicable for this section of the river; that concludes, field data indicated an annual total sediment flow of roughly 1, 536, 337 tons.

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Evaluation of Selected Bed Load Transport Equation for Different Representative Sediment Sizes in Mountain Rivers

Yadav

2023

Lecture Notes in Civil Engineering

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Evaluation of bed load equations using field measured bed load and bed material load

Cited by 5 publications

References 27 publications

GEP- and MLR-based equations for stable channel analysis

GEP- and MLR-based equations for stable channel analysis

Hydraulic Model Prediction of the Total Load of Sediment Transport in The Euphrates River at The Upstream Ramadi Barrage

Evaluation of Selected Bed Load Transport Equation for Different Representative Sediment Sizes in Mountain Rivers

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