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Geotechnical and Geological Engineering

, Volume 36, Issue 4, pp 2505–2516 | Cite as

Effect of Gradation of Bed Material on Local Scour Depth

  • Bintul Huda Mir
  • Mohd Akbar Lone
  • Javeed Ahmad Bhat
  • Nasir Ahmad Rather
Original paper

Abstract

The paper presents a study on local scour with respect to bed material gradation, flow depth and the Froude number. In the study, bed materials collected from five different rivers were used separately for four different shapes of the obstructions. The water discharge was also varied for each run. The experimental results obtained, reveal the dependence of local scour on the overall bed material gradation, and shape of the obstruction, especially the upstream interface. The models developed on basis of the experimental findings for different shapes are more realistic than the widely adopted criteria which mainly consider only effective size, d50 of the bed material, ignoring the other gradation parameters. Moreover, it was found that the obstruction shape also affects the scour phenomenon considerably.

Keywords

Gradation Local scour Bed material Sediment Obstruction Flume Froude number Flow depth 

Notes

Acknowledgements

The paper presents part of the research work carried out by the author*, who receives a Doctoral Fellowship from the Ministry of Human Resources Development (MHRD), Government of India. The experimental work was carried out in the Fluid Mechanics Laboratory, National Institute of Technology, Srinagar, Jammu and Kashmir.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Civil EngineeringNational Institute of TechnologySrinagarIndia

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