In the bustling city of Lagos, a silent crisis is unfolding, one that threatens to unravel the delicate balance of its ecosystem. The once-serene waters of Lagos Lagoon are now under siege, not from the usual suspects of pollution or overfishing, but from the relentless dredging machines that are reshaping the city's landscape. As the sun rises over the city, the hum of these machines becomes a familiar soundtrack, a stark contrast to the peaceful mornings of the past.
The dredging of sand, a practice regulated by the Lagos state government and the waterways authority, is a double-edged sword. While it fuels the city's insatiable demand for land development, from high-rise blocks to luxurious housing estates, it also wreaks havoc on the lagoon's ecosystem. The Nigerian Institute for Oceanography and Marine Research (NIOMR) has revealed a disturbing truth: the seabed has eroded by nearly 6 meters between Banana Island and the Third Mainland Bridge, a critical stretch of Lagos' main lagoon channel. This erosion is not just a physical change; it's a disruption to the very fabric of life in the lagoon.
Dr. Nnimmo Bassey, director of the ecological thinktank Health of Mother Earth Foundation (Homef), paints a grim picture. "When you dredge sand at that scale without proper environmental impact assessments, it's like a silent killer. It destroys species, disrupts fisheries, and ultimately affects everyone who depends on them." The impact is far-reaching, from the fishers who once relied on the lagoon's bounty to the coastal communities that are now at the mercy of rising waters.
Fasasi Adekunle, a 55-year-old fisher from Epe, embodies the struggle. "We used to return with full nets, earning at least 30,000 naira (£16). Now, the dredgers have turned our waters unpredictable. We go farther, spend more on fuel, and sometimes return empty-handed." The once-dependable lagoon has become a fickle friend, a sentiment echoed by many along the waterfront.
The crisis extends beyond the fishers. Ogbemi Okuku, a 20-year-old resident of Era Town, laments, "As Lagos rises, our land washes away. They build estates with sand dredged from our waters, but who is building for us?" The story is repeated across Oto-Awori, where Ajoke Orebiyi, a 42-year-old fishmonger, has seen her income plummet by nearly half in five years. "The fishers return with almost nothing," she says, "and our income reflects that." The decline in fish populations, often linked to the climate crisis, is compounded by the dredging's impact on the lagoon floor.
Jeremiah, a 77-year-old fisher in Oto-Awori, adds, "When the dredgers operate, the water turns cloudy. The fish move away, and sometimes we find them floating dead on the surface." The science is clear: dredging increases turbidity, muddying the water and destroying breeding grounds. But for those who depend on daily catches, survival takes precedence over science.
The consequences of this crisis are not confined to Lagos alone. Sand, the second-most extracted resource after water, is a key ingredient in concrete, glass, and asphalt. Coastal and marine sands, especially sharp sand, are highly sought after by the construction industry. However, in Lagos, the impact is magnified due to its flood-prone, low-lying geography, making it particularly vulnerable to sea-level rise and sediment disruption.
Dr. Joseph Onoja, director general of the Nigerian Conservation Foundation (NCF), warns of the broader implications. "Unregulated dredging harms more than just fish. It endangers sea turtle nesting sites and migratory bird habitats, pushing regional species to extinction. We are already seeing early signs of ecosystem collapse in fisheries, migratory birds, and endangered sea turtles." The dredging may not be the sole cause, but it intensifies existing pressures, eroding the shoreline and displacing established fishing communities.
Mark Ofua, west Africa representative for Wild Africa, a conservation advocacy organisation, highlights the severity of the situation. "Dredging causes severe environmental destruction, affecting every level of the food chain. The entire society feels the impact." The economic incentives are powerful, with sand mining offering a lucrative income stream for local power brokers and a vital lifeline for artisanal miners like Wasiu Olaniyi, who now depends on sand dredging to support his family.
The regulatory framework in Lagos is in place, but enforcement is weak. "Most mechanised dredging is carried out at night, allowing operators to work under the radar," says Akan Okiji, another fisher in Epe. The complicity of local leaders further silences those who speak out, as community organiser in Oto-Awori explains, "When traditional leaders endorse a dredging company, it becomes very difficult for ordinary people to speak out. Many fear the consequences or losing the small benefits they’ve been promised."
The call for action is clear. Environmental rights activists at Homef and conservationists at NCF advocate for full-scale environmental monitoring, habitat restoration, and a dredging moratorium in sensitive areas. "Development is essential, but it must be sustainable," says Onoja. "We’re seeing a breakdown in scientific assessment, EIA approvals, enforcement, and even political commitment. The government must be held responsible."
As the sun sets over Lagos, the dredging machines continue their relentless work, shaping the city's future. But the cost is steep, and the consequences are far-reaching. The question remains: can Lagos find a balance between development and sustainability, or will the lagoon's ecosystem collapse under the weight of progress?
