Articles | Volume 26, issue 4
Hydrol. Earth Syst. Sci., 26, 923–940, 2022
Hydrol. Earth Syst. Sci., 26, 923–940, 2022
Research article
18 Feb 2022
Research article | 18 Feb 2022

Historical simulation of maize water footprints with a new global gridded crop model ACEA

Oleksandr Mialyk et al.

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Cited articles

Abraha, M., Chen, J., Hamilton, S. K., and Robertson, G. P.: Long-term evapotranspiration rates for rainfed corn versus perennial bioenergy crops in a mesic landscape, Hydrol. Process., 34, 810–822,, 2020. 
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: Crop evapotranspiration: guidelines for computing crop water requirements, FAO irrigation and drainage paper 56, Food and Agriculture Organization of the United Nations, Rome, 300 pp., ISBN 92-5-104219-5, (last access: 14 February 2022)1998. 
Amante, C.: ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis, NOAA,, 2009. 
Andarzian, B., Bannayan, M., Steduto, P., Mazraeh, H., Barati, M. E., Barati, M. A., and Rahnama, A.: Validation and testing of the AquaCrop model under full and deficit irrigated wheat production in Iran, Agricult. Water Manage., 100, 1–8,, 2011. 
Araya, A., Kisekka, I., and Holman, J.: Evaluating deficit irrigation management strategies for grain sorghum using AquaCrop, Irrig. Sci., 34, 465–481,, 2016. 
Short summary
As the global demand for crops is increasing, it is vital to understand spatial and temporal patterns of crop water footprints (WFs). Previous studies looked into spatial patterns but not into temporal ones. Here, we present a new process-based gridded crop model to simulate WFs and apply it for maize in 1986–2016. We show that despite the average unit WF reduction (−35 %), the global WF of maize production has increased (+50 %), which might harm ecosystems and human livelihoods in some regions.