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DocumentA Digital Global Map of Irrigation Areas - An update for Asia (2005)
Frankfurt Hydrology Paper 1
2005Also available in:
No results found.The Land and Water Development Division of the Food and Agriculture Organization of the United Nations and the Johann Wolfgang Goethe University, Frankfurt am Main, Germany, are cooperating in the development of a global irrigation-mapping facility. This report describes an update of the Digital Global Map of Irrigated Areas for the continent of Asia. For this update, an inventory of subnational irrigation statistics for the continent was compiled. The reference year for the statistics is 2000. Adding up the irrigated areas per country as documented in the report gives a total of 188.5 million ha for the entire continent. The total number of subnational units used in the inventory is 4 428. In order to distribute the irrigation statistics per subnational unit, digital spatial data layers and printed maps were used. Irrigation maps were derived from project reports, irrigation subsector studies, and books related to irrigation and drainage. These maps were digitized and compared with satellite images of many regions. In areas without spatial information on irrigated areas, additional information was used to locate areas where irrigation is likely, such as land-cover and land-use maps that indicate agricultural areas or areas with crops that are usually grown under irrigation. Publication details: Frankfurt Hydrology Paper 01, Frankfurt University, Frankfurt/M., Germany and Food and Agriculture Organization of the United Nations, Rome, Italy. -
Book (stand-alone)A Digital Global Map of Irrigated Areas - An update for Latin America and Europe (Report N. 4) 2001
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No results found.This report describes an update of the Digital Global Map of Irrigated Areas for Latin America and Europe. The map depicts the percentage of each 0.5˚ by 0.5˚ cell that was equipped for irrigation in 1995. The first version of the map has been updated and improved for Latin America (including the Caribbean) and Europe, based on 1) new information from FAO's AQUASTAT and FAOSTAT, 20 national data on irrigation in sub-national units, 3) geographic information on the location and extent of irrigated areas and 4) the European land cover map CORINE. The total irrigated area per country has changed considerably in many countries, especially in Latin America where the information acquired by FAO for the new AQUASTAT report is now included. In total, irrigated areas has increased by 0.4% in Latin America as compared to the first version of the map, while it has decreased by 4.5% in Europe. Compared to the first version of the map, the spatial resolution of the input data is much higher, and the new maps show a more disperse irrigation. This documentation also describes the data sources and the generation process of the new maps for Latin America and Europe, and discusses the map quality. Publication details: Kassel World Water Series 4, Center for Environmental Systems Research, University of Kassel, Germany, 14 pp + Appendix. -
Book (stand-alone)Irrigation in Africa, Europe and Latin America - Update of the digital global map of irrigation areas to Version 4 2006
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No results found.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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