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April 15, 2024
GreentvAfrica News
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Erosion threatens Lagos communities – Groin technology deployed as a shield.

Lagos State is planning to implement Groin technology in order to protect and preserve coastline communities from extinction, according to Commissioner for Waterfront Infrastructure Development, Yacoob Alebiosu.

Some communities like Idotun, Origanrigan, Olomowewe, Itoke, and Asoroko in Ibeju Lekki have been severely affected by coastal erosion.

Alebiosu, in a statement to the press, mentioned that the state will combat this issue using a cheaper Groin technology that has been successful in other African countries.

Groin technology involves the engineering and construction of structures that consider factors like wave action, sediment transport, and environmental impact. It is commonly used in coastal management to maintain beaches and shorelines in the face of erosion caused by natural processes or human activities.

Groins, which are structures built perpendicular to the shoreline using rocks or concrete, help prevent or reduce beach erosion by trapping sand carried by waves and currents. This not only maintains a beach on one side but also provides stability for piers or harbors.

Alebiosu explained: “We are exploring the option of reclamation and protection of the remaining villages, despite the high cost involved. Currently, we have some groins around Okunde, known as the Great Wall. Our aim is to block these groins to alleviate pressure in that area. However, we need to extend this from Alpha Beach to Ibeju Lekki, covering a distance of about 42 km which would require approximately 105 groins.

“A year ago, the cost of constructing a groin was around N12 billion. The total coastline stretch in Lagos is about 180 km.

“We are not only focusing on groins but also considering replenishment techniques like those used in the Netherlands. We are seeking collaboration with the Federal Government and private sector to achieve this goal.”

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