Development and validation of the global map of irrigation areas

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. It is thus an important data set for global studies related to water and land use. 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.

[1]  Petra Döll,et al.  Model-based scenarios of water use in two semi-arid Brazilian states , 2002 .

[2]  C. Vörösmarty,et al.  Global water resources: vulnerability from climate change and population growth. , 2000, Science.

[3]  P. Döll,et al.  A Digital Global Map of Irrigated Areas An Update for Latin America and Europe , 2001 .

[4]  O. Boucher,et al.  Direct human influence of irrigation on atmospheric water vapour and climate , 2004 .

[5]  Soroosh Sorooshian,et al.  Global Energy and Water Cycle Experiment , 2002 .

[6]  P. Döll,et al.  Global estimates of water withdrawals and availability under current and future “business-as-usual” conditions , 2003 .

[7]  Petra Döll,et al.  A digital global map of irrigated areas. , 2000 .

[8]  K. Beven,et al.  Hydrology and Earth System Sciences , 2006 .

[9]  Peter Wallensteen,et al.  Comprehensive Assessment of the Freshwater Resources of the World, International Fresh Water Resources: Conflict or Cooperation , 1997 .

[10]  S. Kanae,et al.  Global assessment of current water resources using total runoff integrating pathways , 2001 .

[11]  J. Bruinsma.  World Agriculture: Towards 2015/2030: An Fao Perspective , 2002 .

[12]  S. Wood,et al.  Pilot analysis of global ecosystems: Agroecosystems , 2000 .

[13]  Petra Döll,et al.  Impact of Climate Change and Variability on Irrigation Requirements: A Global Perspective , 2002 .

[14]  Limin Yang,et al.  Development of a global land cover characteristics database and IGBP DISCover from 1 km AVHRR data , 2000 .

[15]  I. Shiklomanov.  Appraisal and Assessment of World Water Resources , 2000 .