Engineering Design
Gravity-Fed Water Supply Scheme — Hydraulic & Structural Design, South-Western Uganda
Overview:
Cadron Consult was engaged to design a gravity-fed water supply scheme serving a cluster of rural growth centres in South-Western Uganda. Existing point-water sources could no longer meet demand, and households were travelling long distances for safe water. The assignment covered source assessment, hydraulic modelling, structural design of intake and storage works, and preparation of complete tender documentation for the implementing agency.
Approach:
The team began with topographic surveys and source yield measurements to confirm that gravity flow was feasible across the full network. Hydraulic analysis was used to size 28 km of transmission and distribution mains, position break-pressure tanks, and balance supply across public tap stands and yard connections. Structural designs were prepared for the intake works, sedimentation chamber, and reinforced concrete storage reservoirs, with drawings, technical specifications, and bills of quantities compiled into a tender-ready package.
Technical specifications:
Network: 28 km of HDPE and uPVC mains (OD 63–160 mm)
Storage: two reinforced concrete reservoirs, 100 m³ and 50 m³
Head control: six break-pressure tanks along the transmission line
Design demand: 15,000+ people at the 20-year horizon
Deliverables: design report, drawings, specifications and bills of quantities
Results:
The completed design package passed technical review without major revisions and proceeded directly to tender. Gravity flow eliminates pumping and energy costs, keeping long-term operation and maintenance within the capacity of the local water board. The scheme delivers safe water within easy reach of most households in the service area, with provision for future extension as the growth centres expand.
28 km
of transmission and distribution mains designed
15,000+
people served at the 20-year design horizon
99%
Accuracy and consistency
