Nature-based solutions for upgrading harbour revetments in Simrishamn
(2024) In TVVR 5000 VVRM05 20241Division of Water Resources Engineering
- Abstract
- In late October 2023, the storm Babet struck the southeast coast of Sweden, high waves and extreme water levels caused significant damage to infrastructure. Simrishamn’s central harbour was particularly affected, with waves smashing and destroying the as- phalt on the southern pier. The revetment covering the entire seaward edge of the pier is estimated to tolerate a significant wave height of up to 1.81 metres by the Hudson equation. Simulations using EBED for nearshore wave transformation indicated that the storm produced waves with significant heights of at least 2.45 metres, exceeding the revetment’s design capacity. To address this issue, a submerged breakwater was modelled by manipulating the bathymetry of the area in front of the... (More)
- In late October 2023, the storm Babet struck the southeast coast of Sweden, high waves and extreme water levels caused significant damage to infrastructure. Simrishamn’s central harbour was particularly affected, with waves smashing and destroying the as- phalt on the southern pier. The revetment covering the entire seaward edge of the pier is estimated to tolerate a significant wave height of up to 1.81 metres by the Hudson equation. Simulations using EBED for nearshore wave transformation indicated that the storm produced waves with significant heights of at least 2.45 metres, exceeding the revetment’s design capacity. To address this issue, a submerged breakwater was modelled by manipulating the bathymetry of the area in front of the harbour. The preliminary design of the breakwater, including the crest height and width of 5 and 6 metres respectively, was based on the Friebel and Harris equation. A rubble-mound structure was chosen for its effectiveness in enhancing local biodiversity. For a reef that extended in front of the entire pier under the Babet storm conditions showed that the preliminary design was effective. Testing various widths and heights of the longer breakwater showed that the transmissioncoefficient was more dependent on the height than the width of the crest. A shorter reef, extending only in front of the problematic pier area, failed to protect the pier from damaging wave heights due to wave diffraction. The model used in this study has limitations, particularly in its inability to account for permeable structures. Further investigations are needed to find a balance between the longer and shorter reef designs and to experiment with different reef placements. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9172022
- author
- Ahlbeck, Maria LU
- supervisor
- organization
- course
- VVRM05 20241
- year
- 2024
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- coastal engineering, submerged breakwater, EBED, near shore, revetment, detached reef, wave transformation, artificial reef, stone reef
- publication/series
- TVVR 5000
- report number
- TVVR24/5003
- ISSN
- 1101-9824
- language
- English
- additional info
- Examiner; Caroline Hallin
- id
- 9172022
- date added to LUP
- 2024-09-03 15:23:35
- date last changed
- 2024-09-03 15:23:35
@misc{9172022,
abstract = {{In late October 2023, the storm Babet struck the southeast coast of Sweden, high waves and extreme water levels caused significant damage to infrastructure. Simrishamn’s central harbour was particularly affected, with waves smashing and destroying the as- phalt on the southern pier. The revetment covering the entire seaward edge of the pier is estimated to tolerate a significant wave height of up to 1.81 metres by the Hudson equation. Simulations using EBED for nearshore wave transformation indicated that the storm produced waves with significant heights of at least 2.45 metres, exceeding the revetment’s design capacity. To address this issue, a submerged breakwater was modelled by manipulating the bathymetry of the area in front of the harbour. The preliminary design of the breakwater, including the crest height and width of 5 and 6 metres respectively, was based on the Friebel and Harris equation. A rubble-mound structure was chosen for its effectiveness in enhancing local biodiversity. For a reef that extended in front of the entire pier under the Babet storm conditions showed that the preliminary design was effective. Testing various widths and heights of the longer breakwater showed that the transmissioncoefficient was more dependent on the height than the width of the crest. A shorter reef, extending only in front of the problematic pier area, failed to protect the pier from damaging wave heights due to wave diffraction. The model used in this study has limitations, particularly in its inability to account for permeable structures. Further investigations are needed to find a balance between the longer and shorter reef designs and to experiment with different reef placements.}},
author = {{Ahlbeck, Maria}},
issn = {{1101-9824}},
language = {{eng}},
note = {{Student Paper}},
series = {{TVVR 5000}},
title = {{Nature-based solutions for upgrading harbour revetments in Simrishamn}},
year = {{2024}},
}