Advanced

Shoreline response to a single shore-parallel submerged breakwater

Ranasinghe, R.; Larson, Magnus LU and Savioli, J. (2010) In Coastal Engineering 57(11-12). p.1006-1017
Abstract
Submerged breakwaters (SBWs) are becoming a popular option for coastal protection, mainly due to their low aesthetic impact on the natural environment. However, SBWs have rarely been employed for coastal protection in the past and therefore, their efficacy remains largely unknown. The main objective of the present study was to investigate the structural and environmental conditions that govern the mode of shoreline response (i.e shoreline erosion vs shoreline accretion) to SBWs. The relative importance of the key structural and environmental parameters governing the response mode to a single shore parallel SBW is investigated through a combination of theoretical analysis and numerical modelling. Using physical considerations, a theoretical... (More)
Submerged breakwaters (SBWs) are becoming a popular option for coastal protection, mainly due to their low aesthetic impact on the natural environment. However, SBWs have rarely been employed for coastal protection in the past and therefore, their efficacy remains largely unknown. The main objective of the present study was to investigate the structural and environmental conditions that govern the mode of shoreline response (i.e shoreline erosion vs shoreline accretion) to SBWs. The relative importance of the key structural and environmental parameters governing the response mode to a single shore parallel SBW is investigated through a combination of theoretical analysis and numerical modelling. Using physical considerations, a theoretical response-function model is derived under several simplifying assumptions including parallel depth contours, linear wave theory, shore normal waves, and no wave current interaction. Numerical modelling is undertaken with the Mike21 model suite to simulate the depth averaged velocity fields (without morphological updating) due to waves acting on a single shore-parallel SBW located on a schematised beach with parallel depth contours. In total 92 coupled wave current simulations were undertaken. The results indicate that the mode of shoreline response to the SBW can be expressed in terms of the two non-dimensional parameters h(B)/H-0 and (s(B)/h(B))(3/2)(L-B/h(B))(2)(A(3)/h(B))(1/2) (variables defined in the text). (C) 2010 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coastal protection, 2DH numerical modelling, Submerged breakwater, Shoreline response
in
Coastal Engineering
volume
57
issue
11-12
pages
1006 - 1017
publisher
Elsevier
external identifiers
  • wos:000282560600005
  • scopus:77956344632
ISSN
0378-3839
DOI
10.1016/j.coastaleng.2010.06.002
project
MERGE
language
English
LU publication?
yes
id
db0e5776-342f-47f1-9a56-670db111ef01 (old id 1727966)
date added to LUP
2010-11-22 16:37:05
date last changed
2018-05-29 11:02:26
@article{db0e5776-342f-47f1-9a56-670db111ef01,
  abstract     = {Submerged breakwaters (SBWs) are becoming a popular option for coastal protection, mainly due to their low aesthetic impact on the natural environment. However, SBWs have rarely been employed for coastal protection in the past and therefore, their efficacy remains largely unknown. The main objective of the present study was to investigate the structural and environmental conditions that govern the mode of shoreline response (i.e shoreline erosion vs shoreline accretion) to SBWs. The relative importance of the key structural and environmental parameters governing the response mode to a single shore parallel SBW is investigated through a combination of theoretical analysis and numerical modelling. Using physical considerations, a theoretical response-function model is derived under several simplifying assumptions including parallel depth contours, linear wave theory, shore normal waves, and no wave current interaction. Numerical modelling is undertaken with the Mike21 model suite to simulate the depth averaged velocity fields (without morphological updating) due to waves acting on a single shore-parallel SBW located on a schematised beach with parallel depth contours. In total 92 coupled wave current simulations were undertaken. The results indicate that the mode of shoreline response to the SBW can be expressed in terms of the two non-dimensional parameters h(B)/H-0 and (s(B)/h(B))(3/2)(L-B/h(B))(2)(A(3)/h(B))(1/2) (variables defined in the text). (C) 2010 Elsevier B.V. All rights reserved.},
  author       = {Ranasinghe, R. and Larson, Magnus and Savioli, J.},
  issn         = {0378-3839},
  keyword      = {Coastal protection,2DH numerical modelling,Submerged breakwater,Shoreline response},
  language     = {eng},
  number       = {11-12},
  pages        = {1006--1017},
  publisher    = {Elsevier},
  series       = {Coastal Engineering},
  title        = {Shoreline response to a single shore-parallel submerged breakwater},
  url          = {http://dx.doi.org/10.1016/j.coastaleng.2010.06.002},
  volume       = {57},
  year         = {2010},
}