By Patience Namuddu
KAMPALA, Uganda — For decades, the Nakivubo drainage channel running through Kampala’s central business district symbolised the city’s persistent flooding problem. During heavy rains, the narrow six-metre channel frequently overflowed into nearby streets and markets, disrupting trade and daily movement in one of the capital’s busiest commercial zones.
Today, that once flood-prone trench has been transformed into a modern dual-lane drainage corridor designed to significantly improve water flow while supporting new commercial development above ground.
The redevelopment project expanded the original six-metre channel into a reinforced 12-metre structure consisting of two parallel six-metre drainage lanes. Engineers say the design increases the channel’s hydraulic capacity, allowing it to carry larger volumes of stormwater during peak rainfall.
The project was spearheaded by Ugandan businessman Hamis Kiggundu in coordination with the Kampala Capital City Authority and other government agencies.
Improved drainage capacity
Beyond widening the channel, the redevelopment introduced reinforced structural walls, silt traps and catchment sections aimed at preventing blockages caused by debris and sediment.
Modern lighting has also been installed inside the drainage corridor, enabling engineers and city technical teams to carry out routine inspections safely. Access points allow maintenance teams to monitor water flow and conduct repairs when necessary.
Officials say the upgrades mark a shift from reactive flood response toward a more proactive drainage management system.
Kampala’s drainage infrastructure is often put to the test during intense seasonal rains. While experts say long-term performance will need to be evaluated over several rainy seasons, the upgraded section has already handled recent heavy downpours without the flooding that historically affected nearby markets and streets.
Commercial development above the channel
The transformation extends beyond the drainage system itself.
Above the covered corridor, about 1.5 kilometres of new commercial structures are emerging across parts of the central business district. The development consists of multi-level blocks with retail shops on the ground floor and additional commercial space on upper levels.
In some sections, rooftop areas are being used for parking.
Where open drainage channels once limited movement and informal trading, continuous rows of shopfronts now form organized commercial corridors.
Construction is still ongoing in parts of the project, but the first phase has already begun reshaping the city’s landscape.
Economic impact
Urban economists say such infrastructure-linked commercial developments can have broader economic benefits.
Each shop operating within the corridor must obtain a trading licence from the Kampala Capital City Authority, contributing additional revenue to the city administration.
Increased commercial activity may also lead to higher tax collections through imports and trade duties managed by the Uganda Revenue Authority.
The project is also creating employment opportunities for shopkeepers, sales workers, security personnel, cleaners and logistics operators. Businesses such as transport services and food vendors are expected to benefit from the growing commercial activity in the area.
Part of a broader urban challenge
Kampala’s flooding challenges are not limited to the Nakivubo corridor. Rapid urban expansion, wetland encroachment and increased surface runoff have placed significant pressure on the city’s drainage infrastructure.
Urban planners say the redesign of the Nakivubo channel represents a broader shift in how Kampala approaches aging infrastructure — combining flood control with better land use in high-value commercial areas.
However, experts caution that maintaining the system will be critical to its long-term success.
Future phases
The Nakivubo drainage system stretches across several parts of Kampala before draining into wetlands connected to Lake Victoria.
The current redevelopment focuses on the central business district as the first phase of a larger corridor upgrade.
If future phases extend the widened drainage model to other sections of the channel, engineers say the improvements could significantly strengthen Kampala’s ability to manage stormwater in the years ahead.
For now, the transformation marks a notable shift in the capital’s urban landscape, turning what was once an exposed drainage trench into a concealed infrastructure corridor supporting both improved flood management and expanding commercial activity