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Experimental and Numerical Modeling of Wave Transmission Over Submerged Breakwater and Rigid Vegetation

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Recent Advances in Structural Engineering

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 135))

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Abstract

The wave–structure interaction besides hydrodynamics over natural and submerged breakwaters is an empirical process due to the complex flow process. A better understanding of the wave transmission through natural and artificial submerged breakwaters is vital in the field of coastal conservation. The studies investigating transmission coefficient (KT), in general using phase averaging approach, in particular are limited. In this study, numerical simulations are carried out using one-dimensional Boussinesq wave model for submerged (i) broad dykes, (ii) narrow dykes, (iii) semi-circular breakwater and (iv) rigid vegetation. The validation of the model is done with a series of experimental observations carried out in two-dimensional wave flume for each breakwater. KT decreases with increasing wave steepness, relative crest width, relative water depth, relative crest free board for all kinds of breakwater configurations. In particular, KT was observed to be more for broad dykes and less for rigid vegetation. Model results were compared using physical model tests, and also with numerical and empirical models. Furthermore, wave transmission coefficients obtained from the laboratory model experimental investigation are in good agreement with the numerical simulations. Phase averaging approach gives more insight into the physical description of the wave–structure interaction over and around submerged breakwaters where limited experimental data is available.

Article highlights: numerical simulation of semi-circular breakwater and rigid vegetation to the laboratory scale was new attempt to understand the wave transformation over these structures. physical and numerical modeling of broad, narrow dykes and semi-circular breakwater and their performance comparison was an additional attempt maintaining their constant volumetric proportions.

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Acknowledgements

The authors acknowledge DHI (India) Water and Environment Pvt Ltd to provide the MIKE license to carry out the Boussinesq wave model studies. The authors also acknowledge the help and guidance received from Department of Marine and Coastal at DHI during the model studies.

Conflict of Interest

The authors declare that they have no conflict of interest.

Author information

Authors and Affiliations

  1. Department of Civil Engineering, Andhra University, Visakhapatnam, Andhra Pradesh, India

    Munireddy G. Mutukuru & Gorle Giridhar

  2. Department of Civil Engineering, KSRM College of Engineering, YSR Kadapa, Andhra Pradesh, India

    P. Kishorekumar Reddy

Authors
  1. Munireddy G. Mutukuru
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  2. P. Kishorekumar Reddy
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  3. Gorle Giridhar
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Corresponding author

Correspondence to Munireddy G. Mutukuru .

Editor information

Editors and Affiliations

  1. Department of Ocean Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India

    Srinivasan Chandrasekaran

  2. Department of Civil Engineering, Guru Ghasidas Vishwavidyalaya, Bilaspur, Chhattisgarh, India

    Shailendra Kumar

  3. Department of Civil Engineering, National Institute of Technology Jamshedpur, Jharkhand, India

    Seeram Madhuri

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Mutukuru, M.G., Kishorekumar Reddy, P., Giridhar, G. (2021). Experimental and Numerical Modeling of Wave Transmission Over Submerged Breakwater and Rigid Vegetation. In: Chandrasekaran, S., Kumar, S., Madhuri, S. (eds) Recent Advances in Structural Engineering. Lecture Notes in Civil Engineering, vol 135. Springer, Singapore. https://doi.org/10.1007/978-981-33-6389-2_25

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  • DOI: https://doi.org/10.1007/978-981-33-6389-2_25

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-33-6388-5

  • Online ISBN: 978-981-33-6389-2

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