How to Plan Water Availability and Use on the Farm

A water plan should begin before the crop area is committed. List what water is likely to be available, when it can be accessed and how confidently that supply can be relied on. Then discuss the crop plan with a local agricultural adviser rather than assuming last season's irrigation pattern will suit the next one.

Describe each water source

Record the source, access arrangements, seasonal reliability, pumping or delivery capacity, energy cost and any known quality concerns. Distinguish water physically present from water the farm can legally and practically use. Shared sources need an agreed allocation and a contact for resolving interruptions.

Use recent observations and local records where available. Note uncertainty: a source described as reliable during a normal year may not be reliable in a dry period. Do not treat the storage capacity of a pond as an automatic guarantee of the same usable volume throughout the season.

Match supply to crop requirements

FAO's crop-water guidance relates water requirements to crop and local conditions. Ask the local adviser to help interpret crop stage, soil, weather and the irrigation method. This article does not prescribe a universal interval or quantity.

FAO's water-scarcity framework emphasises understanding demand and supply when considering responses. At farm level, this means testing whether the proposed crop area is realistic before investing in seed, fertiliser or equipment.

Keep a simple irrigation log

For each field, record date, crop stage, source, approximate duration or measured volume, rainfall observations and any problem. Duration alone is not a reliable volume measure when pump flow changes. Where a safe, suitable measurement method is available, use it consistently and record its limitations.

Review the log with someone who understands the local crop. An unexpected rise in pumping time may reflect leakage, a failing pump or changing source conditions. Investigate before deciding that the crop automatically needs more irrigation.

Maintain the delivery system

• Check visible leaks and damaged fittings.
• Follow equipment guidance for filters and maintenance.
• Keep electrical and mechanical repairs with competent personnel.
• Record who operates shared equipment and when.
• Check whether water reaches the intended area evenly.
• Review the plan after significant weather or supply changes.

Evaluate a new irrigation system using installation cost, maintenance, energy, suitability and available support. Do not assume a technology guarantees savings in every field or that a subsidy is assured.

Prepare for a shortage

Agree who will obtain local advice, communicate with users and revise operations if supply falls. Consider feasible adjustments before an emergency, including the next season's area and crop choices. Avoid making a major crop decision from a single forecast or an unverified message.

Frequently asked questions

Can we copy another farmer's schedule? Use it as a discussion point, not a prescription. Soil, crop stage, rainfall and equipment may differ.

Should we irrigate on a fixed calendar? Follow locally appropriate advice and observations. A calendar should be reviewed against actual conditions rather than followed blindly.

Prepared with AI assistance for the CAFIC knowledge series. Examples are illustrative. Check current official requirements and local conditions before acting on regulatory or technical guidance.