Characterisation and modelling of washover fans
(2007) 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:
https://lup.lub.lu.se/record/643288
- author
- Donnelly, Chantal LU and Sallenger, Asbury H.
- organization
- publishing date
- 2007
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Washover fans, Anthropogenic control, Pre-existing gaps
- host publication
- 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
- conference location
- New Orleans, LA, United States
- conference dates
- 2007-05-13 - 2007-05-17
- 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
- 2016-04-04 11:08:09
- date last changed
- 2022-01-29 21:25:35
@inproceedings{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.}},
booktitle = {{Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes}},
isbn = {{978-0-7844-0926-8}},
keywords = {{Washover fans; Anthropogenic control; Pre-existing gaps}},
language = {{eng}},
pages = {{2061--3073}},
publisher = {{American Society of Civil Engineers (ASCE)}},
title = {{Characterisation and modelling of washover fans}},
url = {{http://dx.doi.org/10.1061/40926(239)162}},
doi = {{10.1061/40926(239)162}},
year = {{2007}},
}