The rhythm of Lagos’ rainy season has become a metronome for disaster. Every June, the skies open and the city’s concrete veins—streets, roofs, parking lots—channel stormwater into overwhelmed gutters, turning intersections into instant rivers and homes into islands. Nigeria’s federal government has spent billions on flood warnings, sandbags, and emergency responses, yet the water keeps coming. What if the solution isn’t just bigger pipes, but a different kind of infrastructure altogether?
That’s the question driving new research by G. Fayomi, a civil and environmental engineer at the University of South Africa in Johannesburg. In a study published in the *International Journal of Human Capital in Urban Management* (formerly *International Journal of Human Capital in Urban Management*), Fayomi argues that the key to reducing urban flooding lies not in traditional drainage systems, but in rethinking how cities absorb, store, and slowly release stormwater.
“Current flood risk management in Nigeria is reactive,” Fayomi explains. “We wait for the rain, then respond. But climate change, rapid urbanization, and the loss of natural vegetation are accelerating runoff faster than our systems can handle.” Impervious surfaces—roads, rooftops, compacted soils—are effectively sealing the ground, forcing water to race across the surface instead of soaking in. The result is higher peak flows, deeper flooding, and greater damage to homes, businesses, and critical infrastructure.
Fayomi’s research focuses on sustainable urban drainage systems (SUDS)—also known as green infrastructure—that mimic natural processes. These include permeable pavements, bioretention basins (rain gardens), green roofs, and constructed wetlands. Each acts as a mini-reservoir, temporarily storing runoff and releasing it slowly, reducing peak flow volumes and recharging groundwater. “These aren’t just environmental niceties,” Fayomi notes. “They’re engineered systems with measurable hydrological and economic benefits.”
For the energy sector, the implications are significant. Flooding disrupts power distribution, damages substations, and triggers costly outages. Traditional flood defenses—concrete channels and pumps—are energy-intensive and often fail under extreme rainfall. SUDS, by contrast, require minimal ongoing energy input once installed. Green roofs reduce building cooling loads, lowering electricity demand. Permeable pavements can reduce urban heat island effects, indirectly cutting energy use for air conditioning.
Moreover, SUDS can be integrated into urban redevelopment projects, creating multi-functional spaces that support biodiversity, improve air quality, and enhance property values. “We’re not just managing water,” Fayomi says. “We’re building resilience into the urban fabric.”
The study highlights a gap in current policy: while Nigeria has national disaster plans, there’s limited empirical data on how SUDS perform in local conditions. Fayomi calls for pilot projects in flood-prone cities like Lagos, Port Harcourt, and Kano, with monitoring to assess performance across different climates and soil types.
As climate variability increases, the cost of inaction will rise—both in human and economic terms. The energy sector, often a first responder during floods, stands to gain from more resilient urban water systems. By shifting from reactive flood control to proactive water-sensitive design, cities can reduce the volume of storm runoff, protect critical infrastructure, and lower long-term operational costs.
The message is clear: the future of flood management isn’t just about moving water faster. It’s about slowing it down—intentionally, sustainably, and strategically. And that could be the most valuable infrastructure of all.