Water, Zone by Zone
Integrated agricultural irrigation network across 42 hectares in Ogun State.
Uneven water distribution across a 42-hectare production area was limiting yield in the outer rows of every block. Manual and gravity-fed watering left pressure inconsistent by the time water reached the far end of each field, and the farm had no way to meter or adjust water use zone by zone.
Gently sloped farmland dropping roughly 6 metres across the site, favouring gravity-assisted flow toward the eastern blocks.
Distinct wet and dry seasons, with the dry season creating the highest-stakes irrigation demand and the tightest water budget.
A single borehole and an underused surface reservoir, with no filtration or pressure regulation in place.
Installation had to proceed around an active growing season without disturbing existing crop rows.
Deliver even, measurable water pressure to every zone of the farm, with the ability to regulate and fertigate each zone independently.
Daniel divided the 42 hectares into eight independently regulated zones, each sized to the pump station's realistic output rather than a single farm-wide pressure target. A mainline and sub-mainline network feeds pressure-regulated drip zones, with filtration and a fertigation point positioned upstream of the first zone split.
Eight zones, independently regulated.
Click a zone to inspect its specification.
| Area | 3.8 ha |
| Design flow | 28 L/min |
| Pressure | 1.4 bar |
| Emitter spacing | 30 cm |
Click a zone on the map to inspect its specification.
Specification.
| Mainline | 160 mm HDPE, 480 m |
| Sub-mainlines | 90 mm HDPE, 5,920 m combined |
| Filtration | Sand media + 130-mesh screen |
| Pressure regulation | Per-zone regulators, 1.4–1.6 bar |
| Drip zones | 8, independently valved |
| Pump station | 15 kW centrifugal, 3.2 bar output |
| Fertigation point | Venturi injector, upstream of Zone 01 |
| Total design flow | 295 L/min at peak demand |
On site.
The original pump location produced unstable suction during peak demand, as the borehole's dry-season yield fell below the pump's rated draw. The system was redesigned around a raised storage buffer that refills steadily from the borehole and lets the pump draw from a stable head, decoupling irrigation timing from the borehole's slower recharge rate.
Measured outcomes.
A water source's rated yield and its real dry-season yield are two different numbers — the buffer that reconciles them is often the most important component in the whole design.