Can Sakaja’s Ksh2B drainage plan stop Nairobi’s El Niño flooding?

Nairobi plans to invest Ksh2 billion in drainage and flood-mitigation works ahead of expected El Niño rains. The project aims to address the city's recurring flooding issues by targeting 227 identified flood hotspots across its 17 sub-counties. Governor Johnson Sakaja emphasizes the proactive nature of the investment, stating that the county is moving before the rains intensify.

The Ksh2 billion allocation is part of a Ksh2.4 billion multi-agency flood-preparedness programme involving national agencies. The funds will cover drainage and flood-mitigation works along 19 roads in flood-prone areas, including opening and deepening drainage channels, clearing obstructions, and improving stormwater flow. However, the success of the programme depends on multiple factors.

The drainage works must be completed before the most intense rainfall, the upgraded systems must be capable of handling large volumes of stormwater, and proper maintenance is crucial to ensure the infrastructure remains effective. While the drainage program addresses some aspects of Nairobi's vulnerability, rapid urban development has also contributed to the issue.

The city's increasing paved and built-up land reduces rainwater absorption while requiring larger volumes of stormwater to be managed through existing drainage channels. Blocked, undersized, or poorly maintained drainage systems can be overwhelmed by intense rainfall, exacerbating flooding. The county also calls on residents, businesses, and community groups to keep drainage areas clear.

The multi-agency response structure includes specialized committees for infrastructure and drainage, emergency response and evacuation, shelter and relief, security and traffic, and communication. The success of the Ksh2 billion drainage programme will be measured by its ability to reduce flooded roads, improve traffic movement, and protect businesses and homes in targeted areas during heavy rainfall.