Nigeria: Modelling Coastal Defenses by HR Wallingford

Image source: HR Wallingford

A 3D scale model of a Nigerian beach near Lagos has been put through its paces this month in HR Wallingford’s modelling hall.

New coastal defenses are needed where the beach has retreated at the residential Maiyegun Beach Estate following major development farther along the coast.

The designers of the coastal protection scheme, CDR International, asked HR Wallingford to build the model to show how the proposed sea defenses would influence the response of the beach.

“Constructed in one of our wave basins, the model represents an embayment between two groynes with a low crested breakwater between them. The bathymetry (or seabed) has been replicated in the vicinity of the breakwater and model sand was used to recreate the beach,” HR Wallingford said.

“Our engineers investigated alternative designs of the low-crested breakwater structure and the response of the beach behind the structure. The scheme was tested under five sea states – the first two represented the frequently occurring conditions on the beach and the other three represented more extreme storms, with less frequent return periods. After each test the model was surveyed by a 3D laser scanner.”

HR Wallingford has also carried out 2D modelling in one of their flumes to collect further data about the breakwater section, using a combination of wave transmission and armor stability testing.

 

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews (www.portnews.ru) holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee: snitko@portnews.ru

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