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The Influence of Vegetated Alternate Bar on Flow Resistance in an Alluvial Straight Channel

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Proceedings of the 5th International Conference on Water Resources (ICWR) – Volume 1

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 293))

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Abstract

Alternate bars significantly affect river characteristics, especially bed roughness and flow resistance. Additionally, the presence of vegetation on the bar surface impacts river hydrodynamics and morphology significantly. However, the details on their impacts are insufficient for us to interpret. This study analyzes the interaction of vegetation and alternate bars with the flow resistance in an alluvial river. The study aims to investigate the bed roughness parameters of Darcy’s friction factor and Manning’s roughness coefficient that impacted from vegetated alternate bars. The study was based on experimental analysis. A straight flume channel 10 m long and 1 m wide was used with bed material of uniform sediment size 0.8 mm. The measurement was made based on the seven cross-sections created along the channel. The obtained results revealed that the friction factor and Manning’s roughness coefficient were significantly increased on the vegetated alternate bar compared with the other areas in the channel. Thus, the resistance of flow increased around the vegetated alternate bar as the bed roughness increased.

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Acknowledgements

This study is a collaborated research between Universiti Teknologi MARA Pasir Gudang Branch and Universiti Teknologi Malaysia. The research was funded by the Fundamental Research Grant Scheme (FRGS) No. 5F089. The authors would like to acknowledge those who were involved directly and indirectly in this project, in particular, UiTM Pasir Gudang and UTM, for providing research facilities and manpower.

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Authors and Affiliations

  1. School of Civil Engineering, College of Engineering, Universiti Teknologi MARA Pasir Gudang, Johor, Malaysia

    M. Z. M. Salleh

  2. School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia

    M. Z. M. Salleh, Z. Ibrahim, R. Saari, M. E. Mohd Shariff & M. Jumain

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  1. M. Z. M. Salleh
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  2. Z. Ibrahim
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  3. R. Saari
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  4. M. E. Mohd Shariff
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  5. M. Jumain
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Correspondence to M. Z. M. Salleh .

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Editors and Affiliations

  1. School of Civil Engineering, Universiti Teknologi Malaysia, Johor, Malaysia

    Sobri Harun

  2. School of Civil Engineering, Universiti Teknologi Malaysia, Johor, Malaysia

    Ilya Khairanis Othman

  3. School of Civil Engineering, Universiti Teknologi Malaysia, Johor, Malaysia

    Mohamad Hidayat Jamal

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Salleh, M.Z.M., Ibrahim, Z., Saari, R., Mohd Shariff, M.E., Jumain, M. (2023). The Influence of Vegetated Alternate Bar on Flow Resistance in an Alluvial Straight Channel. In: Harun, S., Othman, I.K., Jamal, M.H. (eds) Proceedings of the 5th International Conference on Water Resources (ICWR) – Volume 1. Lecture Notes in Civil Engineering, vol 293. Springer, Singapore. https://doi.org/10.1007/978-981-19-5947-9_14

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  • DOI: https://doi.org/10.1007/978-981-19-5947-9_14

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  • Print ISBN: 978-981-19-5946-2

  • Online ISBN: 978-981-19-5947-9

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