Details
| Original language | English |
|---|---|
| Journal | Proceedings of the Coastal Engineering Conference |
| Issue number | 36 (2018) |
| Publication status | Published - 30 Dec 2018 |
| Event | 36th International Conference on Coastal Engineering, ICCE 2018 - Baltimore, United States Duration: 30 Jul 2018 → 3 Aug 2018 |
Abstract
This work presents the results of an experimental investigation on the effects of a sequence of storms on wave overtopping at a nearly vertical battered seawall at the back of a sandy foreshore. The experiments were carried out in the Large Wave Flume (GWK) at Leibniz Universität Hannover (Germany), as part of the research project ICODEP (Impact of Changing fOreshore on flood DEfence Performance), within the European Union programme Hydralab+. The layout consisted of a 10/1 battered seawall and a natural sandy foreshore with an initial 1:15 slope. The beach sand had a nominal diameter of 0.30 mm. Three storm sequences were simulated, where each consisted of three individual storms. Each storm was divided into six steps in which the wave conditions and still water level were varied to represent the peak of an actual storm. The six sea states were based on a JONSWAP spectral shape, with wave heights roughly between 0.6 m and 0.8 m. Two still water levels were tested. For the central two steps the level was such that the freeboard was only 0.14 m and almost all waves were overtopping. In the remaining steps low still water levels were employed, leaving a narrow swash zone. Two storm profiles were considered, the first one with a lower level of energy and the second one with a higher one. These were combined in the three different sequences. All the tested wave conditions were designed to be erosive for the beach, with no recovery in between. Each sequence started from a plain beach configuration and the beach was not restored in between storms. The measurements included waves, pressure and forces, sediment concentrations and flow velocity together with overtopping. The profile of the beach was measured after each sea state tested.
Keywords
- Beach foreshore, Coastal flooding, Coastal structures, Morphodynamics, Seawall, Storm sequences, Wave overtopping
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Ocean Engineering
- Earth and Planetary Sciences(all)
- Oceanography
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In: Proceedings of the Coastal Engineering Conference, No. 36 (2018), 30.12.2018.
Research output: Contribution to journal › Conference article › Research
}
TY - JOUR
T1 - Large scale tests on foreshore evolution during storm sequences and the performance of a nearly vertical structure
AU - Briganti, Riccardo
AU - Musumeci, Rosaria Ester
AU - van der Meer, Jentsje
AU - Romano, Alessandro
AU - Stancanelli, Laura Maria
AU - Kudella, Matthias
AU - Akbar, Rizki
AU - Mukhdiar, Ryard
AU - Altomare, Corrado
AU - Suzuki, Tomohiro
AU - de Girolamo, Paolo
AU - Mancini, Giulia
AU - Besio, Giovanni
AU - Dodd, Nicholas
AU - Schimmels, Stefan
N1 - Funding Information: The work was supported by the European Community Horizon 2020 Research and Innovation Programme through the grant to HYDRALAB-PLUS, Contract no. 654110.
PY - 2018/12/30
Y1 - 2018/12/30
N2 - This work presents the results of an experimental investigation on the effects of a sequence of storms on wave overtopping at a nearly vertical battered seawall at the back of a sandy foreshore. The experiments were carried out in the Large Wave Flume (GWK) at Leibniz Universität Hannover (Germany), as part of the research project ICODEP (Impact of Changing fOreshore on flood DEfence Performance), within the European Union programme Hydralab+. The layout consisted of a 10/1 battered seawall and a natural sandy foreshore with an initial 1:15 slope. The beach sand had a nominal diameter of 0.30 mm. Three storm sequences were simulated, where each consisted of three individual storms. Each storm was divided into six steps in which the wave conditions and still water level were varied to represent the peak of an actual storm. The six sea states were based on a JONSWAP spectral shape, with wave heights roughly between 0.6 m and 0.8 m. Two still water levels were tested. For the central two steps the level was such that the freeboard was only 0.14 m and almost all waves were overtopping. In the remaining steps low still water levels were employed, leaving a narrow swash zone. Two storm profiles were considered, the first one with a lower level of energy and the second one with a higher one. These were combined in the three different sequences. All the tested wave conditions were designed to be erosive for the beach, with no recovery in between. Each sequence started from a plain beach configuration and the beach was not restored in between storms. The measurements included waves, pressure and forces, sediment concentrations and flow velocity together with overtopping. The profile of the beach was measured after each sea state tested.
AB - This work presents the results of an experimental investigation on the effects of a sequence of storms on wave overtopping at a nearly vertical battered seawall at the back of a sandy foreshore. The experiments were carried out in the Large Wave Flume (GWK) at Leibniz Universität Hannover (Germany), as part of the research project ICODEP (Impact of Changing fOreshore on flood DEfence Performance), within the European Union programme Hydralab+. The layout consisted of a 10/1 battered seawall and a natural sandy foreshore with an initial 1:15 slope. The beach sand had a nominal diameter of 0.30 mm. Three storm sequences were simulated, where each consisted of three individual storms. Each storm was divided into six steps in which the wave conditions and still water level were varied to represent the peak of an actual storm. The six sea states were based on a JONSWAP spectral shape, with wave heights roughly between 0.6 m and 0.8 m. Two still water levels were tested. For the central two steps the level was such that the freeboard was only 0.14 m and almost all waves were overtopping. In the remaining steps low still water levels were employed, leaving a narrow swash zone. Two storm profiles were considered, the first one with a lower level of energy and the second one with a higher one. These were combined in the three different sequences. All the tested wave conditions were designed to be erosive for the beach, with no recovery in between. Each sequence started from a plain beach configuration and the beach was not restored in between storms. The measurements included waves, pressure and forces, sediment concentrations and flow velocity together with overtopping. The profile of the beach was measured after each sea state tested.
KW - Beach foreshore
KW - Coastal flooding
KW - Coastal structures
KW - Morphodynamics
KW - Seawall
KW - Storm sequences
KW - Wave overtopping
UR - http://www.scopus.com/inward/record.url?scp=85063506712&partnerID=8YFLogxK
U2 - 10.9753/icce.v36.papers.13
DO - 10.9753/icce.v36.papers.13
M3 - Conference article
AN - SCOPUS:85063506712
JO - Proceedings of the Coastal Engineering Conference
JF - Proceedings of the Coastal Engineering Conference
SN - 0161-3782
IS - 36 (2018)
T2 - 36th International Conference on Coastal Engineering, ICCE 2018
Y2 - 30 July 2018 through 3 August 2018
ER -