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FAO AQUASTAT

 

Contact

Stefan Siebert

 

Institute of Crop Science and Resource Conservation (INRES),

Katzenburgweg 5, 53115 Bonn, Germany

 

tel.: +49 (0)228 733262

email: [Email protection active, please enable JavaScript.]

 

 
Sie sind hier: Startseite Forschung Forschungsprojekte GMIA GMIA - Detailed Project Information

GMIA - Detailed Project Information

Detailed description and documentation of the development of the Global Map of Irrigation Areas (GMIA)

Development of a digital global map of irrigation areas

Irrigated agricultural land comprises less than one-fifth of the total cropped area of the world but produces about two-fifths of the world's food. At the same time, irrigation accounts for about 70 % of the global water withdrawals and for about 90% of the global consumptive water use. In order to analyze irrigated crop production and the related irrigation water requirements at the global scale, a digital global map of irrigation areas has been developed which indicates the areas that are equipped for irrigation.

The first global map of irrigated areas was developed at the Center for Environmental Systems Research, University of Kassel in 1999; it described the fraction of each 0.5 degree cell area that was equipped for irrigation around 1995. To improve the map and to increase the resolution, a collaboration was initialized between the map development team and the Land and Water Division of the Food and Agriculture Organization of the United Nations (FAO) . For updating, a Global Irrigation Map Generator was developed which combines a data base containing geographic information on irrigated areas (e.g. point or polygon information on the location, size of irrigation projects, raster data) and statistical information on the total irrigated area in administrative units like countries, districts or counties (scheme of mapping methodology). The data set was then improved and updated several times while members of the map development team moved to the Hydrology Group of the Institute of Physical Geography, University of Frankfurt (P. Döll, S. Siebert) and later to the Crop Science Group at the University of Bonn (S. Siebert).

The current version of the data set (version 5.0, October 2013) is a version of the above map which has been updated for all countries worldwide. It shows the area within each 5 arc-minute cell (area 9.25 km by 9.25 km at the equator) that was equipped for irrigation around year 2005 and, for the first time, the percentage of the area equipped for irrigation that was actually irrigated around year 2005 and the percentage of area equipped for irrigation irrigated with groundwater, surface water or non-conventional water sources. 

 


Project history and documentation

Actual and previous versions of the Global Map of Irrigation Areas as well as comprehensive documentation are available as part of FAO's AQUASTAT programme at the official web presentation of the irrigation mapping project. Publications and working reports are listed below.

 

Version 5.0 (2013): Version 5 contains updates for most countries and provides, for the first time, a separation of irrigated areas according to the source of water (surface water, groundwater, or water from non-conventional sources).  The distinction of water sources is based on sub-national irrigation statistics derived from many different sources. Methodology and most of the data are described in Siebert et al. (2010).

  • Siebert, S., Henrich, V., Frenken, K., Burke, J. (2013): Digital global map of irrigation areas version 5.0. University of Bonn, Germany, and FAO, Rome, Italy.
  • The documentation report for this update is available as: Siebert, S., Henrich, V., Frenken, K., Burke, J. (2013): Update of the digital global map of irrigation areas to version 5. University of Bonn, Germany, and FAO, Rome, Italy. [Download pdf, 2.3 MB]
  • A set of posters showing the new version of the data set can be downloaded here. [Download pdf, low resolution (0.9 MB) or high resolution (3.0 MB)]
  • The dataset is available in GIS-format at the official web presentation site of the irrigation mapping project.


Version 4.0 (2006): Update for Africa, Europe and parts of Latin America using the map generation method described in Siebert et al. (2005)

  • Siebert, S., Döll, P., Feick, S., Frenken, K., Hoogeveen, J. (2007): Global map of irrigation areas version 4.0.1. University of Frankfurt (Main), Germany, and FAO, Rome, Italy.
  • The documentation report for this update is available as Frankfurt Hydrology Paper 5: Siebert, S., Hoogeveen, J., Frenken, K. (2006): Irrigation in Africa, Europe and Latin America. Update of the Digital Global Map of Irrigation Areas to Version 4. Frankfurt Hydrology Paper 05, University of Frankfurt (Main), Germany and FAO, Rome, Italy. [Download pdf, 8.5 MB]
  • Version 4.01 of the map and its full documentation is now also available on CD-ROM as FAO Land and Water Digital Media Series 34.
  • The new version of the irrigation map was presented at the international workshop on global irrigated area mapping held in Colombo, Sri Lanka and at the Tropentag conference 2006 held in Bonn, Germany. A poster showing the map generation can be downloaded here. [Download pdf, low resolution (2 MB) or high resolution (22.2 MB)].


Version 3.0 (2005): Update for North America, using the map generation method decribed in Siebert et al. (2005)


Version 2.2 (2005): Update for Asia, using the map generation method decribed in Siebert and Döll (2001)

  • Siebert, S., Feick, S., Hoogeveen, J. (2005): A digital global map of irrigated areas – An update for Asia. Frankfurt Hydrology Paper 01, Frankfurt University, Frankfurt/M., Germany and Food and Agriculture Organization of the United Nations, Rome, Italy. [Download pdf , high resolution: 25.0 MB; low resolution: 10.3 MB]
  • Preview of map version 2.2 [Download pdf, 0.9 MB]


Versions 2.0 & 2.1 (2002): Updates for Africa and Australia, using the map generation method described in Siebert and Döll (2001)

  • Siebert, S., Döll, P., Hoogeveen, J. (2002): Global map of irrigated areas version 2.1. Center for Environmental Systems Research, University of Kassel, Germany, and FAO, Rome, Italy.


Version 1.1 (2001): Update for Latin America and Europe; new methodology to combine statistical and geographical information

  • Siebert, S., Döll, P. (2001): A digital global map of irrigated areas – An update for Latin America and Europe. Kassel World Water Series 4, Center for Environmental Systems Research, University of Kassel, Germany, 14 pp + Appendix. [Download pdf, 0.7 MB]


Version 1: (1999): Initial version of the map

  • Döll, P., Siebert, S. (2000): A digital global map of irrigated areas. ICID Journal, 49(2), 55-66. [Download pdf, 8.4 MB]
  • Döll, P., Siebert, S.(1999): A digital global map of irrigated areas. Kassel World Water Series 1, Center for Environmental Systems Research, University of Kassel, Germany, 23 pp + Appendix. [Download pdf, 2 MB]

 

Kassel World Water Series 1 report Kassel World Water Series 4 report Frankfurt Hydrology Paper 01 Frankfurt Hydrology Paper 05 Update to map version 5

 

 


Applications

The map of irrigation areas has been used mainly in global land use / land cover studies, to compute irrigation water requirements at the global or regional scale, to simulate crop production and to estimate the impact of irrigation on water vapor flows or river discharge. The three publications in scientific journals related to this project (Döll and Siebert, 2000; Siebert et al., 2005; Siebert et al., 2010) have been cited more than 200 times in peer-reviewed scientific journals registered by the Web of Knowledge and more than 400 times according to Google Scholar.

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