An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves

Devastating tsunami waves can mobilize a substantial amount of coastal sediments and change the coastal morphology considerably. In this study, laboratory experiments were performed in a wave flume to investigate the changes of beach profile and mean grain size caused by tsunami-like waves that have...

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Main Authors: Chen, Jie, Huang, Zhenhua, Jiang, Changbo, Deng, Bin, Long, Yuannan
Format: Article
Language:English
Published: 2012
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Online Access:https://hdl.handle.net/10356/94724
http://hdl.handle.net/10220/8760
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-947242020-03-07T12:45:24Z An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves Chen, Jie Huang, Zhenhua Jiang, Changbo Deng, Bin Long, Yuannan DRNTU::Science::Geology::Volcanoes and earthquakes Devastating tsunami waves can mobilize a substantial amount of coastal sediments and change the coastal morphology considerably. In this study, laboratory experiments were performed in a wave flume to investigate the changes of beach profile and mean grain size caused by tsunami-like waves that have a front similar to that of a solitary wave and an undulating tail following the wave front. A composite slope was constructed using a mixture of two sizes of sand. In addition to recording the wave rush-up and rush-down processes using video cameras, measurements were also made on water surface elevation, bed profile and the final size distribution of the sand mixture for three water depths. The results showed that sand suspension and erosion were caused mainly by sheet flows when water retreats from the beach, whereas the offshore sandbars, composed mainly of coarser sand, formed mainly from the run-down jumps caused by the collapsing of retreating water with waves in the undulating tail. The findings of this study have the potential to assist researchers in understanding nearshore tsunami flows from tsunami deposits. 2012-10-11T06:13:58Z 2019-12-06T19:01:07Z 2012-10-11T06:13:58Z 2019-12-06T19:01:07Z 2012 2012 Journal Article Chen, J., Huang, Z., Jiang, C., Deng, B., & Long, Y. (2012). An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves. Journal of Coastal Research, 28(5), 1303-1312. https://hdl.handle.net/10356/94724 http://hdl.handle.net/10220/8760 10.2112/JCOASTRES-D-11-00180.1 en Journal of coastal research © 2012 Coastal Education & Research Foundation.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Science::Geology::Volcanoes and earthquakes
spellingShingle DRNTU::Science::Geology::Volcanoes and earthquakes
Chen, Jie
Huang, Zhenhua
Jiang, Changbo
Deng, Bin
Long, Yuannan
An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves
description Devastating tsunami waves can mobilize a substantial amount of coastal sediments and change the coastal morphology considerably. In this study, laboratory experiments were performed in a wave flume to investigate the changes of beach profile and mean grain size caused by tsunami-like waves that have a front similar to that of a solitary wave and an undulating tail following the wave front. A composite slope was constructed using a mixture of two sizes of sand. In addition to recording the wave rush-up and rush-down processes using video cameras, measurements were also made on water surface elevation, bed profile and the final size distribution of the sand mixture for three water depths. The results showed that sand suspension and erosion were caused mainly by sheet flows when water retreats from the beach, whereas the offshore sandbars, composed mainly of coarser sand, formed mainly from the run-down jumps caused by the collapsing of retreating water with waves in the undulating tail. The findings of this study have the potential to assist researchers in understanding nearshore tsunami flows from tsunami deposits.
format Article
author Chen, Jie
Huang, Zhenhua
Jiang, Changbo
Deng, Bin
Long, Yuannan
author_facet Chen, Jie
Huang, Zhenhua
Jiang, Changbo
Deng, Bin
Long, Yuannan
author_sort Chen, Jie
title An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves
title_short An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves
title_full An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves
title_fullStr An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves
title_full_unstemmed An experimental study of changes of beach profile and mean grain size caused by tsunami-like waves
title_sort experimental study of changes of beach profile and mean grain size caused by tsunami-like waves
publishDate 2012
url https://hdl.handle.net/10356/94724
http://hdl.handle.net/10220/8760
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