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Modeling Shoreline Evolution at Hai Hau Beach, Vietnam

Le Xuan, Hoan LU ; Hanson, Hans LU ; Larson, Magnus LU ; Donnelly, Chantal LU and Pham, Thanh Nam LU (2010) In Journal of Coastal Research 26(1). p.31-43
Abstract
The coastline of Hai Hau District, located on the northeast coast of Vietnam with about 30 km of shoreline, is chronically eroding. Previous studies have tried to highlight the main causes of the erosion along this coastline, and several hypotheses exist. To examine the hypothesis that gradients in the longshore sediment transport rate and cross-shore fine sediment lost offshore are the main causes generating the serius erosion at Hai Hau Beach, a newly developed numerical model of shoreline change based on the one-line theory was applied and compared with data. Sea dike segments, reinforced by stones and mortar, were modeled using a seawall boundary condition, and the sediment continuity equation was modified to take into account the... (More)
The coastline of Hai Hau District, located on the northeast coast of Vietnam with about 30 km of shoreline, is chronically eroding. Previous studies have tried to highlight the main causes of the erosion along this coastline, and several hypotheses exist. To examine the hypothesis that gradients in the longshore sediment transport rate and cross-shore fine sediment lost offshore are the main causes generating the serius erosion at Hai Hau Beach, a newly developed numerical model of shoreline change based on the one-line theory was applied and compared with data. Sea dike segments, reinforced by stones and mortar, were modeled using a seawall boundary condition, and the sediment continuity equation was modified to take into account the offshore transport of fine-grained sediment. The simulated shorelines agreed well with the measured shorelines, both for the calibration and validation periods. The calculated sediment budget shows that the net sediment transport is in the southward direction and that a large amount of fine-grained sediment is lost into deep water. These two sinks of sediment are believed to be the main causes of the serious erosion at Hai Hau Beach. (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
fine sediment, sediment transport, shoreline evolution, Hai Hau Beach, Ba Lat Mouth, shoreline modeling
in
Journal of Coastal Research
volume
26
issue
1
pages
31 - 43
publisher
Coastal Education and Research Foundation
external identifiers
  • wos:000274041300003
  • scopus:76449113754
ISSN
0749-0208
DOI
10.2112/08-1061.1
project
MERGE
language
English
LU publication?
yes
id
4154372a-432a-449f-bdbe-1dbdcafdfa8b (old id 1570682)
date added to LUP
2010-03-17 08:24:53
date last changed
2018-05-29 11:44:46
@article{4154372a-432a-449f-bdbe-1dbdcafdfa8b,
  abstract     = {The coastline of Hai Hau District, located on the northeast coast of Vietnam with about 30 km of shoreline, is chronically eroding. Previous studies have tried to highlight the main causes of the erosion along this coastline, and several hypotheses exist. To examine the hypothesis that gradients in the longshore sediment transport rate and cross-shore fine sediment lost offshore are the main causes generating the serius erosion at Hai Hau Beach, a newly developed numerical model of shoreline change based on the one-line theory was applied and compared with data. Sea dike segments, reinforced by stones and mortar, were modeled using a seawall boundary condition, and the sediment continuity equation was modified to take into account the offshore transport of fine-grained sediment. The simulated shorelines agreed well with the measured shorelines, both for the calibration and validation periods. The calculated sediment budget shows that the net sediment transport is in the southward direction and that a large amount of fine-grained sediment is lost into deep water. These two sinks of sediment are believed to be the main causes of the serious erosion at Hai Hau Beach.},
  author       = {Le Xuan, Hoan and Hanson, Hans and Larson, Magnus and Donnelly, Chantal and Pham, Thanh Nam},
  issn         = {0749-0208},
  keyword      = {fine sediment,sediment transport,shoreline evolution,Hai Hau Beach,Ba Lat Mouth,shoreline modeling},
  language     = {eng},
  number       = {1},
  pages        = {31--43},
  publisher    = {Coastal Education and Research Foundation},
  series       = {Journal of Coastal Research},
  title        = {Modeling Shoreline Evolution at Hai Hau Beach, Vietnam},
  url          = {http://dx.doi.org/10.2112/08-1061.1},
  volume       = {26},
  year         = {2010},
}