Global Irrigated Area Mapping

Introduction

Identifying irrigated areas of land has important implications for policy decisions on food security, poverty alleviation, water resources management, and environmental conservation. Irrigation is also major consumer of energy, so it's influence on the water-food-energy nexus can be profound: Current estimates suggest that up to 80% of global fresh water withdrawals are used for irrigation, consuming 35% of global energy use and underpinning 40% of global food production.
This site presents the results of IWMI's first attempt to use satellite images to map global irrigated and rainfed croplands for the nominal year of 2000. The products include:

  • 10 km irrigated and rainfed cropland maps
  • Global land use/and cover (LULC) map
  • 500 meter irrigated area map for South Asia
  • 30 meter irrigated area maps for the Syr Darya River Basin in Central Asia and the Krishna River Basin in India.

The maps contain information on irrigation water sources (surface, groundwater), cropping intensity (single, double, continuous) and dominant crop types. Detailed statistics and communication materials, including posters and publications are also provided.

Key Publication