Imagine a city steeped in history, the first capital of a country, majestically resting on a strip of sand between a tranquil lagoon and an increasingly aggressive Atlantic Ocean. This is the reality of Aneho today. Coastal erosion here is not a distant scientific concept: it is the foam of the waves licking the foundations of ancestral homes. But facing this existential threat, the Guin people do not give up. Climate resilience in Aneho has become an example of survival, blending modern engineering, international programs, and traditional nature conservation practices.
The Threat of the Ocean: Everyday Coastal Erosion
Since the 1980s, the Gulf of Guinea has experienced rapid coastal erosion, with a retreat of the coastline reaching over 10 meters per year in some places. In Aneho, this phenomenon has already swallowed up roads, coconut groves, and entire sections of historic neighborhoods.
The rise in sea levels, combined with strong storms, exacerbates the vulnerability of the sandy coast. The causes are multiple: global climate change warming the oceans, altering coastal currents, but also the disruption of sediment transit caused by heavy infrastructure built further west on the West African coast. In Aneho, the reality is clear: the water is gaining ground.
Direct Impacts on the City:
- Loss of habitable land: Forced relocation of dozens of families.
- Soil salinization: Agricultural lands near the shore lose their fertility.
- Threat to heritage: Old colonial-era buildings and sacred sanctuaries had to be moved.
The collective effort and coastal protection facing the assaults of the sea.
The WACA Program: A Shield of Stone
It is in this critical context that the WACA program (West Africa Coastal Areas Management Program), supported by the World Bank, intervenes. Its objective: to strengthen the resilience of coastal communities against erosion and flooding.
In Aneho, this program has resulted in colossal coastal engineering works. The construction of groynes and rock armor dikes has broken the force of the waves and stabilized the coastline. Large blocks of granite, transported from quarries inland, now form a protective rampart in front of the most vulnerable neighborhoods.
But gray engineering (concrete and rocks) is not enough. The WACA program also integrates beach nourishment, allowing the ocean to naturally dissipate its energy on gentle slopes. These works have literally saved the city, offering essential respite to rethink spatial planning.
Community Action: Restoring Nature
True resilience does not only come from the top; it takes root in the actions of the inhabitants. Aware that mechanical protection has its limits, the people of Aneho have turned to green infrastructure.
Mangrove restoration: The shores of the lagoon system and the Mono estuary are the subject of intense reforestation campaigns. Mangroves are exceptional natural barriers: their complex roots stabilize soils, filter water, and break the energy of floods. Local associations of women and youth organize nurseries and community mangrove planting days.
Adaptation of fishing practices: Facing changing currents and the scarcity of certain species due to warming waters, the fishermen of Aneho adjust their calendars and mesh sizes. Some are turning to sustainable aquaculture in the lagoon, reducing pressure on the Atlantic Ocean.
Cleaning and waste management: A clean coastline is a stronger coastline. Plastic suffocates mangroves and clogs the river mouth ("L'embouchure d'Aneho"), preventing the vital exchange between fresh and salt waters. Volunteer cleaning brigades regularly patrol the beaches, transforming this environmental struggle into a bond of social cohesion.
« The sea took our lands, but it will not take our history. Every rock laid, every mangrove planted is a declaration of our will to survive here, on the land of our ancestors. »
Rethinking the City: A Model for the Future
The fight for resilience is modifying the very physiognomy of Aneho. The new urban development plan integrates retreat zones, banning new constructions in high-risk red zones. Local architecture is adapting, favoring lighter materials or raised foundations in lagoon neighborhoods exposed to periodic flooding.
The ambition is clear: to make Aneho a model of a sustainable coastal city in West Africa. This involves educating younger generations, trained in ecological issues from primary school, and developing responsible tourism. Eco-tourism, visits to the sacred forest, and pirogue rides on the lagoon economically value the ecosystem, further encouraging its preservation.
While Aneho was built by the migratory flows of history, it is being redesigned today by the flows of nature. The city does not just resist; it learns to coexist harmoniously with its maritime and lagoon environment.
Frequently Asked Questions (FAQ)
What is the WACA project in Aneho?
WACA (West Africa Coastal Areas) is a regional project funded by the World Bank. In Aneho, it finances the construction of coastal protection groynes, beach nourishment, and community resilience actions.
Can coastal erosion swallow Aneho?
Without intervention, the risk was real due to the city's geographical position. However, thanks to protection infrastructure and revegetation efforts (mangroves), the sea's retreat has been drastically slowed.
How do Aneho residents participate in resilience?
The residents are on the front line: they plant mangroves to consolidate the banks, organize beach cleanups, adapt their fishing techniques, and develop eco-tourism to value their environment.