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Characterisation and modelling of washover fans

Donnelly, Chantal LU and Sallenger, Asbury H. (2007) 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes In Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes p.2061-3073
Abstract
Pre- and post-storm topography and aerial photography, collected in regions where new washover fans were formed, were studied to determine the extent of morphologic, vegetative and anthropogenic control on washover shape and extent. When overwash is funnelled through a gap in a dune ridge and then spreads laterally on the back barrier, decelerating and depositing sediment, it forms washover fans. Fans were shown to primarily occur at pre-existing gaps in the foredune. During overwash, these gaps, or overwash throats, widened and deepened. The shape and extent of the fan was shown to depend on not only the pre-storm topography, but also the existence of beach tracks, roads and other anthropogenic influences and vegetation. The cross-shore... (More)
Pre- and post-storm topography and aerial photography, collected in regions where new washover fans were formed, were studied to determine the extent of morphologic, vegetative and anthropogenic control on washover shape and extent. When overwash is funnelled through a gap in a dune ridge and then spreads laterally on the back barrier, decelerating and depositing sediment, it forms washover fans. Fans were shown to primarily occur at pre-existing gaps in the foredune. During overwash, these gaps, or overwash throats, widened and deepened. The shape and extent of the fan was shown to depend on not only the pre-storm topography, but also the existence of beach tracks, roads and other anthropogenic influences and vegetation. The cross-shore overwash profile change model by Larson et al. and Donnelly et al. was modified to include pre-storm throat widths and a lateral spreading angle estimated from the pre-storm topography as inputs and tested using cross-shore profiles through the fan centres. These new inputs make the model more generalised, such that the calibrated model is applicable to a wider range of cross-shore profiles. © 2007 ASCE. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Washover fans, Anthropogenic control, Pre-existing gaps
in
Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
pages
2061 - 3073
publisher
American Society of Civil Engineers (ASCE)
conference name
6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
external identifiers
  • Scopus:34548562281
ISBN
978-0-7844-0926-8
DOI
10.1061/40926(239)162
language
English
LU publication?
yes
id
625e45c6-cf59-43f5-a6c7-e98ebdc4f4e0 (old id 643288)
date added to LUP
2007-12-04 14:26:45
date last changed
2016-10-13 04:44:09
@misc{625e45c6-cf59-43f5-a6c7-e98ebdc4f4e0,
  abstract     = {Pre- and post-storm topography and aerial photography, collected in regions where new washover fans were formed, were studied to determine the extent of morphologic, vegetative and anthropogenic control on washover shape and extent. When overwash is funnelled through a gap in a dune ridge and then spreads laterally on the back barrier, decelerating and depositing sediment, it forms washover fans. Fans were shown to primarily occur at pre-existing gaps in the foredune. During overwash, these gaps, or overwash throats, widened and deepened. The shape and extent of the fan was shown to depend on not only the pre-storm topography, but also the existence of beach tracks, roads and other anthropogenic influences and vegetation. The cross-shore overwash profile change model by Larson et al. and Donnelly et al. was modified to include pre-storm throat widths and a lateral spreading angle estimated from the pre-storm topography as inputs and tested using cross-shore profiles through the fan centres. These new inputs make the model more generalised, such that the calibrated model is applicable to a wider range of cross-shore profiles. © 2007 ASCE.},
  author       = {Donnelly, Chantal and Sallenger, Asbury H.},
  isbn         = {978-0-7844-0926-8},
  keyword      = {Washover fans,Anthropogenic control,Pre-existing gaps},
  language     = {eng},
  pages        = {2061--3073},
  publisher    = {ARRAY(0xa457890)},
  series       = {Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes},
  title        = {Characterisation and modelling of washover fans},
  url          = {http://dx.doi.org/10.1061/40926(239)162},
  year         = {2007},
}