(water supplied vs. water used by crop)
Amount of irrigation water required to produce a gram of dry matter
Measure of the efficiency of irrigation schemes.
Increase in efficiency indicates that water losses have been reduced (leakages), water is being managed efficiently: supplied at the right time for the crop, in the right quantities (fields not waterlogged). More water is available for downstream users or users at the downstream end of the irrigation scheme (often the poorer farmers).
Wealth groups; Livelihoods group (e.g. pastoralist, farmers, traders)
Period to achieve the objective;
Direction of change:
Both secondary and primary data collection can be used according to context.
- Baseline/Endline. If multiyear programme consider a mid-term reporting/evaluation
- Secondary data. Reliable/relevant sources from other actors, clusters or government.
Data Collection methods:
Secondary data analysis;
Farmers' harvest data, irrigation management committee water use records;
> Litters per g dry matter
> Litters per g harvested grain
> Total crop dry matter harvested, amount of water supplied by the irrigation scheme.
Needs accurate measurement of water supplied to each farmer in the irrigation scheme. Water is usually measured by farmers in terms of hours rather than litters.