Irrigation system procurement — from water source to root zone
A vendor-neutral procurement framework for commercial irrigation projects: water source works, pump stations, filtration, distribution, application (drip, micro-sprinkler, centre-pivot) and fertigation. Standards, sizing, evaluation criteria and financing pathways.
What determines choice between drip, micro-sprinkler and pivot?
Crop type, soil infiltration, topography, water quality and water availability. Drip fits row crops and orchards on any topography; micro-sprinkler suits orchards needing frost protection; centre-pivot suits large, flat, high-throughput cereals or forages.
- •Irrigation is a system, not equipment — the weakest sub-system determines overall efficiency.
- •Water quality dictates half the system architecture: filtration, disinfection, dosing and drip emitter choice all depend on source analysis.
- •Design for peak demand plus 20% safety margin, not average consumption — under-sized pump stations are the most common retrofit trigger.
- •Fertigation is where irrigation stops being water conveyance and starts being agronomy — evaluate suppliers on horticultural credibility, not pipework.
The 6-sub-system irrigation procurement framework
Every commercial irrigation RFQ must specify each of these six sub-systems and the interfaces between them.
- 1
1. Water source works
Well, surface intake, reservoir, desalination or reuse. Quality analysis and yield confirmation gate everything downstream.
Deliverable: Water source report + quality analysis.
- 2
2. Pump station
Sized for peak demand + 20%. Variable-speed drives, redundancy, backup power.
Deliverable: Pump station specification.
- 3
3. Filtration
Sand, disc or screen — driven by source quality. Automated backflush for commercial scale.
Deliverable: Filtration package spec.
- 4
4. Distribution network
Mainlines, submains, valves, meters and pressure regulation zones.
Deliverable: Hydraulic design + zone plan.
- 5
5. Application
Drip, micro-sprinkler, centre-pivot, sprinkler — matched to crop, soil, topography and water quality.
Deliverable: Application specification.
- 6
6. Fertigation & controls
Dosing, EC/pH monitoring, remote control, telemetry.
Deliverable: Fertigation + controls spec.
Irrigation CAPEX benchmarks
Per-hectare ranges for commercial projects, excluding water source works unless noted.
| Category | Indicative rate | Notes |
|---|---|---|
| Drip irrigation (open field) | $1,800–$3,500 / ha | Includes filtration, no source works |
| Drip irrigation (permanent orchard) | $2,200–$4,500 / ha | Higher-spec emitters and controls |
| Centre-pivot | $900–$1,600 / ha | Excludes pump station |
| Micro-sprinkler (orchards) | $1,600–$2,800 / ha | Includes filtration |
| Pump station (mid-scale) | $40k–$180k | Variable-speed, redundant |
| Fertigation skid (commercial) | $15k–$60k | EC/pH dosing, telemetry |
| Solar off-grid uplift | +15–25% CAPEX | PV + inverter + battery buffer |
Benchmarks assume moderate topography and standard water quality — hilly terrain or brackish water shift costs materially.
Irrigation supplier evaluation criteria
Weight local service capacity heavily — irrigation systems fail on maintenance, not commissioning.
| Criterion | Weight | What to evaluate |
|---|---|---|
| Reference projects (same crop / soil / water quality) | 20% | Comparable water source and crop. |
| Hydraulic design capability | 15% | In-house design vs. templated proposal. |
| Local service and spare parts | 20% | 48-hour parts availability during peak season. |
| Performance guarantees (efficiency) | 10% | Distribution uniformity guarantees where relevant. |
| Financial strength | 10% | Bondable, audited accounts. |
| Fertigation & agronomy support | 10% | Horticultural credibility, not just equipment supply. |
| Warranty & maintenance package | 10% | 5+ years on pipework, structured maintenance contract available. |
| Commercial terms | 5% | Payment schedule, escalation, LD regime. |
Risk register — the six that matter most
Undersized pump station
Mitigation: Design for peak + 20% with variable-speed drives.
Water quality misdiagnosed
Mitigation: Independent lab analysis at Stage 1; retest seasonally if surface source.
Emitter clogging in year 2
Mitigation: Filtration sized to source quality, not to marketing recommendation.
Fertigation dosing errors
Mitigation: EC/pH monitoring with alarming and remote telemetry.
Downloadable templates
Editable, supplier-neutral templates you can adapt to your project. Pair the CAPEX planner with the RFQ template — the RFQ handoff sheet is pre-wired to feed your commercial section.
Interactive tools
Supplier-neutral calculators to stress-test assumptions before you issue an RFQ.
Greenhouse Irrigation Planner
Size flow, storage and dosing for covered production.
Open toolWater Treatment Calculator
Match treatment to source quality.
Open toolProject Configurator
9-step configurator that outputs a component list, procurement packages and expert list you can push into the RFQ Builder.
Open toolDSCR & Payback Calculator
Model financing headroom against target DSCR — pair with the Agriculture Financing Center.
Open toolMove commercial greenhouse procurement into a structured RFQ
Editorial · not a sales pitchWhen your feasibility, financing envelope and technical specification are aligned, the RFQ Builder produces a supplier-neutral request that comparable suppliers can quote against on the same basis.
The facts a complete, supplier-neutral request on this topic includes. Use it as a checklist before submitting.
- Structure type (Venlo glass, polycarbonate multi-span, tunnel) and covered area (m² / ha)
- Climate strategy: heating, cooling, screens, dehumidification and target set-points
- Growing system, irrigation and fertigation scope with water source & quality data
- Energy mix (boiler, CHP, PV, storage) and grid capacity constraints
- Contract structure (EPC, EPC-M, multi-contract) and required performance guarantees
- Financing route: equity/debt split, DSCR target, off-take letters and permitting status
- Water analysis report and borehole test results
- Field/plot map with dimensions and elevation
Opens the RFQ Builder scoped as an irrigation package so suppliers quote hydraulics, filtration and dosing consistently. You stay in control — nothing is submitted until you review and confirm.
Free to submit · supplier-neutral · reviewed by a specialist before any supplier is contacted.
Questions decision-makers ask
Executive-level answers in English, Spanish, French and Portuguese.
English
What determines choice between drip, micro-sprinkler and pivot?+
Crop type, soil infiltration, topography, water quality and water availability. Drip fits row crops and orchards on any topography; micro-sprinkler suits orchards needing frost protection; centre-pivot suits large, flat, high-throughput cereals or forages.
How is irrigation CAPEX financed?+
Development banks and ECAs finance mid–large projects; commercial equipment leasing works for pump stations, pivots and fertigation skids. Agriculture Financing Center covers the full pathway.
What is the useful life of a commercial irrigation system?+
Pipework: 20–25 years for HDPE. Pump station: 15–20 years mechanical, 10–15 electrical. Emitters and filters: 5–10 years. Fertigation controllers: 8–12 years. Plan CAPEX renewal accordingly.