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Submerged and Emerged Rigid Vegetation Impact on Bedforms and Sediment Suspension under Wave Action
,
N. Mori,
Harshinie Karunarathna
Coastal Engineering, Volume: 199, Start page: 104739
Swansea University Authors:
KRISTIAN IONS, Xin Wang, Dominic Reeve , Harshinie Karunarathna
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DOI (Published version): 10.1016/j.coastaleng.2025.104739
Abstract
A series of experiments were carried out in a laboratory wave flume to investigate the impact of coastal rigid vegetation on suspended sediment transport and the generation of bedforms for a range of wave conditions for both submerged and emerged vegetations. Rigid arrays of cylindrical wooden dowel...
| Published in: | Coastal Engineering |
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| ISSN: | 0378-3839 1872-7379 |
| Published: |
Elsevier BV
2025
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa69034 |
| Abstract: |
A series of experiments were carried out in a laboratory wave flume to investigate the impact of coastal rigid vegetation on suspended sediment transport and the generation of bedforms for a range of wave conditions for both submerged and emerged vegetations. Rigid arrays of cylindrical wooden dowels were used as vegetation mimics on a sandy bed. Two vegetation densities were selected, representing dense and sparse vegetation meadows. Synchronised flow velocity and suspended sediment concentration measurements were performed using particle image velocimetry and an acoustic backscatter sensor. Seabed ripples were observed in all cases where the near-bed velocity exceeded the threshold of sediment motion. The near-bed velocity governed sediment suspension on both bare and vegetated sediment seabeds. Near-bed sediment concentration on densely vegetated seabeds was lower than that of bare seabeds under the same wave conditions. These observations highlight the importance of considering the role of vegetation in shaping seabed morphology and the resultant suspended sediment concentrations. Then, the near-bed sediment concentration formulae used on bare sediment beds are validated for use on vegetated seabeds. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
This research is supported by the Engineering and Physical Sciences Research Council (EPSRC) UK Doctoral Training Partnership of Swansea University (EP/T517987/1) grant. We would like to thank Dr. J.M. Horrillo-Caraballo for the assistance during the experiments. XW acknowledges Leverhulme Trust Research Grant RPG-2023-235. We also extend thanks to The Great British Sasakawa Foundation grant No. 6365 and the Disaster Prevention Research Institute (DPRI) of Kyoto University International Collaborative Research Grant 2023IG-02 for facilitating research collaboration between Swansea University and DPRI. NM is also supported by JICA/JST SATREPS Program (JPMJSA2110). |
| Start Page: |
104739 |