Table 1.

The seven different irrigation scenarios that were run with LPJmL for crops planted on large-scale land acquisitions in Africa

Irrigation scenarioDescription
RainfedRainfed agriculture (modeled for crops currently in production on acquired land, and for the staple crop baseline)
Drip (pipelines)Micro (drip) irrigation with pressurized pipelines for distribution
Sprinkler (pipelines)Irrigation with sprinklers supplied by pressurized pipes
MixedIrrigation with a mix of surface and sprinkler irrigation systems with both open canals and pressurized pipes
One-step improvementIrrigation and distribution systems that are one step higher in efficiency than current national irrigation efficiencies (e.g., moving from sprinkler to drip systems).
Current irrigation efficienciesIrrigation under current national irrigation and distribution systems in every country (39) (modeled for crops currently in production on acquired land, and for the staple crop baseline)
Surface (open canals)Surface irrigation systems (flooding) with water diverted from open canals
  • Scenarios are presented from most (top) to least (bottom) efficient, based on gross blue water use. The current irrigation efficiency, and therefore also the one-step improvement, varies by country.