Analytical model of beach erosion and overwash during storms
(2009) In Proceedings of the Institution of Civil Engineers. Maritime Engineering 162(3). p.115-125- Abstract
- During severe storms high waves and water levels may greatly impact the sub-aerial portion of the beach inducing significant morphological change at elevations that the waves can not reach under normal conditions. Morphological formations such as dunes and barrier islands may suffer from direct wave impact and erode. Overwash occurs if the wave run-up and/or the mean water level are sufficiently high allowing for water and sediment to pass over the beach crest, which in turn causes flooding and deposition of sediment shoreward of the crest. An analytical model of sub-aerial beach response to storms was developed based on impact theory, including overwash, and the evolution of schematised dunes was investigated. Furthermore, the analytical... (More)
- During severe storms high waves and water levels may greatly impact the sub-aerial portion of the beach inducing significant morphological change at elevations that the waves can not reach under normal conditions. Morphological formations such as dunes and barrier islands may suffer from direct wave impact and erode. Overwash occurs if the wave run-up and/or the mean water level are sufficiently high allowing for water and sediment to pass over the beach crest, which in turn causes flooding and deposition of sediment shoreward of the crest. An analytical model of sub-aerial beach response to storms was developed based on impact theory, including overwash, and the evolution of schematised dunes was investigated. Furthermore, the analytical model was applied to the case of schematised barrier islands exposed to extensive overwash. After validation using field data, the analytical model was employed at two coastal sites, namely Ocean City on the United States east coast and the Ebro Delta on the Spanish Mediterranean coast, in order to calculate quantities for assessing the storm impact on beaches, such as eroded volume, overwash volume, beach crest reduction, and contour-line retreat. These quantities were subsequently analysed to derive empirical probability distribution functions to be utilised in different types of risk assessment concerning flooding and erosion in coastal areas. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/771954
- author
- Larson, Magnus LU ; Donnelly, Chantal LU ; Jimenez, Jose and Hanson, Hans LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- coastal engineering, hydraulics, hydrodynamics/mathematical modelling
- in
- Proceedings of the Institution of Civil Engineers. Maritime Engineering
- volume
- 162
- issue
- 3
- pages
- 115 - 125
- publisher
- ICE UK
- external identifiers
-
- wos:000272396400004
- scopus:77956420195
- ISSN
- 1741-7597
- DOI
- 10.1680/maen.2009.162.3.115
- language
- English
- LU publication?
- yes
- id
- f6fb429f-161e-4e6f-8e36-06d18ab3766c (old id 771954)
- date added to LUP
- 2016-04-01 13:23:54
- date last changed
- 2022-03-29 07:19:39
@article{f6fb429f-161e-4e6f-8e36-06d18ab3766c,
abstract = {{During severe storms high waves and water levels may greatly impact the sub-aerial portion of the beach inducing significant morphological change at elevations that the waves can not reach under normal conditions. Morphological formations such as dunes and barrier islands may suffer from direct wave impact and erode. Overwash occurs if the wave run-up and/or the mean water level are sufficiently high allowing for water and sediment to pass over the beach crest, which in turn causes flooding and deposition of sediment shoreward of the crest. An analytical model of sub-aerial beach response to storms was developed based on impact theory, including overwash, and the evolution of schematised dunes was investigated. Furthermore, the analytical model was applied to the case of schematised barrier islands exposed to extensive overwash. After validation using field data, the analytical model was employed at two coastal sites, namely Ocean City on the United States east coast and the Ebro Delta on the Spanish Mediterranean coast, in order to calculate quantities for assessing the storm impact on beaches, such as eroded volume, overwash volume, beach crest reduction, and contour-line retreat. These quantities were subsequently analysed to derive empirical probability distribution functions to be utilised in different types of risk assessment concerning flooding and erosion in coastal areas.}},
author = {{Larson, Magnus and Donnelly, Chantal and Jimenez, Jose and Hanson, Hans}},
issn = {{1741-7597}},
keywords = {{coastal engineering; hydraulics; hydrodynamics/mathematical modelling}},
language = {{eng}},
number = {{3}},
pages = {{115--125}},
publisher = {{ICE UK}},
series = {{Proceedings of the Institution of Civil Engineers. Maritime Engineering}},
title = {{Analytical model of beach erosion and overwash during storms}},
url = {{https://lup.lub.lu.se/search/files/3342522/3559244.pdf}},
doi = {{10.1680/maen.2009.162.3.115}},
volume = {{162}},
year = {{2009}},
}