HOMOGENEOUS LOW-CRESTED STRUCTURES FOR BEACH PROTECTION IN CORAL REEF AREAS
PDF

How to Cite

Medina, J. R., Gomez-Martin, M. E., Mares-Nasarre, P., Escudero, M., Oderiz, I., Mendoza, E., & Silva, R. (2020). HOMOGENEOUS LOW-CRESTED STRUCTURES FOR BEACH PROTECTION IN CORAL REEF AREAS. Coastal Engineering Proceedings, (36v), papers.59. https://doi.org/10.9753/icce.v36v.papers.59

Abstract

In many countries, the health of the marine ecosystems and the sun-sand-sea tourism depend on the coral reefs, which have been retreating around the world during the last decades. Homogeneous Low-Crested Structures (HLCS), made of large rocks or pre-cast concrete units, can be placed to mimic the functions of beach protection and eventually serve as a refuge for species. HLCS is a type of multi-purpose green infrastructure which is functionally similar to conventional low-crested structures but have higher porosity and are more easily dismantled for re-use. Contrary to conventional low-crested structures, the functionality of HLCS protecting beaches depends on the selected placement grid; this paper describes physical and numerical placement tests on horizontal bottom used to characterize the layers coefficients of Cubipod HLCS. The Bullet Physic Engine (BPE) numerical model used in the gaming industry, which is based on the rigid body method, is calibrated using the physical placement tests. The layer coefficients of Cubipod HLCS measured in the physical placement tests were similar to those obtained with the BPE numerical model, which could be used to optimize placement grids of HLCS on specific sea bottom conditions. Finally, the influence of the placement grid of Cubipod HLCS on the structure height, crest freeboard and wave transmission is analyzed.

Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/5bi-jpuJYcQ
https://doi.org/10.9753/icce.v36v.papers.59
PDF

References

Blender, 2019. Blender 2.80 Reference Manual. Available at https://www.blender.org/ and visited in January 2020.

Centi, R., 2020. Placement of homogeneous artificial mound breakwaters using a game engine. MSc. thesis, University of L’Aquila (ITA), September 2020.

De Keyser, K., Jacobs, E., 2020. La literature review on low-crested and submerged structures. MSc. thesis, Ghent University (BE), June 2020.

Ferrario, F., Beck, M.W., Storlazzi, C.D., Micheli, F., Shepard, C.C. Airoldi, L., 2014. The effectiveness of coral reefs for coastal hazard risk reduction and adaptation. Nature Communications, 5 (3794), 98-101.

Frens, A.B. 2007. The impact of placement method on Antifer-block stability. M.Sc. thesis, Delft University of Technology (NL), May 2007.

Hamylton, S.M., Duce, S., Vila-Concejo, A., Roelfsema, C.M., Phinn, S.R., Carvalho, R.C., Shawe, E.C., and Joyce, K.E., 2017. Estimating regional coral reef calcium carbonate production from remotely sensed seafloor maps. Remote Sensing of Environment, 201(2017): 88-98.

Medina, J.R., Gómez-Martín, M.E., Corredor, A., 2010. Influence of armour unit placement on armour porosity and hydraulic stability. Proc. 32nd Int. Conf. on Coastal Engineering, ASCE, 1(32), structures.41. doi:10.9753/icce.v32.structures.41.

Medina, J.R., Gómez-Martín, M.E., Mares-Nasarre, P., Odériz, I., Mendoza, E., Silva, R., 2019. Hydraulic performance of homogeneous low-crested structures, Proc. of the Coastal Structures Conference 2019, Bundesanstalt für Wasserbau (BAW), Karlsruhe (GE), 60-68.

Mumby, P.J., Hastings, A., Edwards, H.J., 2007. Thresholds and the resilience of Caribbean coral reefs. Nature, 450, 98–101.

Odériz, I., Mendoza, E., Silva, R., Medina, J.R., 2018. Hydraulic performance of a homogeneous Cubipod low-crested mound breakwater. Proc. of the 7th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science (Coastalab18), (in press).

Rinkevich, B., 2014. Rebuilding coral reefs: does active reef restoration lead to sustainable reefs? Current Opinion in Environmental Sustainability, 7 (2014), 28–36.

Schoonees, T., Gijón-Mancheño, A., Scheres, B., Bouma, T. J., Silva, R., Schlurmann, T., Schüttrumpf, H., 2019. Hard Structures for Coastal Protection, Towards Greener Designs. Estuaries and Coasts. https://doi.org/10.1007/s12237-019-00551-z

Silva, R., Lithgow, D., Esteves, L.S., Martínez, M.L., Moreno-Casasola, P., Martell, R., Pereira, P., Mendoza, E., Campos-Cascaredo, A., Grez, P.W., Osorio, A.F., Osorio-Cano, J.D., Rivillas, G.D., 2017. Coastal risk mitigation by green infrastructure in Latin America. Proc. of the Institution of Civil Engineers-Maritime Engineering, 170 (2), 39-54.

Silva, R., Mendoza, E., Mariño-Tapia, I., Martínez, M.L., Escalante, E., 2016. An artificial reef improves coastal protection and provides a base for coral recovery. Journal of Coastal Research, 75, 467-471.

SPM. 1984. Shore Protection Manual, U.S. Army Corps of Engineers, Waterways Experiment Station, Coastal and Hydraulics Laboratory, Vicksburg, MS.

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.