Articles | Volume 19, issue 3
https://doi.org/10.5194/hess-19-1521-2015
https://doi.org/10.5194/hess-19-1521-2015
Research article
 | 
25 Mar 2015
Research article |  | 25 Mar 2015

A global data set of the extent of irrigated land from 1900 to 2005

S. Siebert, M. Kummu, M. Porkka, P. Döll, N. Ramankutty, and B. R. Scanlon

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Short summary
We developed the historical irrigation data set (HID) depicting the spatio-temporal development of the area equipped for irrigation (AEI) between 1900 and 2005 at 5arcmin resolution. The HID reflects very well the spatial patterns of irrigated land as shown on two historical maps for 1910 and 1960. Global AEI increased from 63 million ha (Mha) in 1900 to 111 Mha in 1950 and 306 Mha in 2005. Mean aridity on irrigated land increased and mean natural river discharge decreased from 1900 to 1950.