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Development and validation of the global map of irrigation areas 

Hydrology and Earth System Sciences, 9, 2005

Year of publication 2005

Place of publication Rome, Italy ;

Pages 13 p.

Author Siebert, S., Döll, P., Hoogeveen, J., Faures, J.-M., Frenken, K., and Feick, S.

Publisher Copernicus Publications ;

Product type Article

Synopsis (short abstract) A new version of a digital global map of irrigation areas was developed by combining irrigation statistics for 10 825 sub-national statistical units and geo-spatial information on the location and extent of irrigation schemes. The map shows the percentage of each 5 arc minute by 5 arc minute cell that was equipped for irrigation around the year 2000. This paper describes the data set and the mapping methodology and gives, for the first time, an estimate of the map quality at the scale of countries, world regions and the globe. Two indicators of map quality were developed for this purpose, and the map was compared to irrigated areas as derived from two remote sensing based global land cover inventories.

Open access article. This article is academically peer reviewed and published externally. This article is published in Hydrology and Earth System Sciences (An interactive open-access journal of the European Geosciences Union), Volume 9, 2005

Cite this content as:

Siebert, S., Döll, P., Hoogeveen, J., Faures, J.-M., Frenken, K., and Feick, S.: Development and validation of the global map of irrigation areas, Hydrol. Earth Syst. Sci., 9, 535–547, https://doi.org/10.5194/hess-9-535-2005, 2005.

Language English

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    The first version of the Digital Global Map of Irrigated Areas was published in 1999. It consisted of a raster map with a resolution of 0.5° by 0.5° containing the percentage of the area that was equipped for irrigation around 1995, the so-called irrigation density. For Version 2, updated maps of Latin America, Europe, Africa and Oceania have been published in 2002. With the update to version 3 in 2005 the map for the whole globe was generated by using the same methodology. In the present report, the update to version 4 in 2006 is presented which incorporates improvements for the continents of Africa and Europe and for parts of Latin America as well.
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    This poster displays the version 4 of the Global Map of Irrigated Areas and it also briefly details the data and methods used for its compilation. The poster was presented by the Frankfurt University and the Food and Agriculture Organization of the United Nations at the International Workshop on Global Irrigated Area Mapping held 25 - 26 September 2006 in Colombo, Sri Lanka, and at the Tropentag Conference 2006 held in Bonn, Germany.
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    A Digital Global Map of Irrigated Areas is a publication related to the GMIA version 1. This paper, published on ICID Journal, 49(2), 55-66, describes the dataset, the data and map sources as well as the map generation, and it discusses the data uncertainty. The digital global map of irrigated areas was developed for the purpose of global modeling of water use and crop production, The map depicts the percentage of each 0.5˚ by 0.5˚ cell that was equipped for irrigation in 1995. It was derived by combining information from large-scale maps with outlines of irrigated areas (one or more countries per map), FAO data on totala irrigated area per country in 1995 and national data on total irrigated area per country, drainage basin or federal state.
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