Variability in the Water Footprint of Arable Crop Production across European Regions
| Autor: | Miroslav Trnka, Triin Saue, J.G. Kroes, Anna Dalla Marta, B. Lalic, Anne Gobin, Domenico Ventrella, Kurt Christian Kersebaum, Johannes Deelstra, Ari Rajala, Josef Eitzinger, Petr Hlavinka, Christos Zoumides, Jozef Takáč, Ruzica Stričevic, Simone Orlandini, Višnja Vučetić, Pirjo Peltonen-Sainio, Pavol Nejedlik, Levent Şaylan |
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| Rok vydání: | 2017 |
| Předmět: |
water footprint
arable crops cereals Europe crop water use yield Irrigation lcsh:Hydraulic engineering Water en Landgebruik 0208 environmental biotechnology Geography Planning and Development 02 engineering and technology Aquatic Science Biochemistry Crop Water balance Soil Bodem Soil Water and Land Use lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Drainage TD201-500 Water Science and Technology 2. Zero hunger lcsh:TD201-500 Water supply for domestic and industrial purposes Crop yield Water and Land Use Hydraulic engineering 04 agricultural and veterinary sciences 15. Life on land 6. Clean water Bodem Water en Landgebruik 020801 environmental engineering Agronomy 13. Climate action 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Arable land TC1-978 Surface runoff Water use |
| Zdroj: | Water (Switzerland) Water, Vol 9, Iss 2, p 93 (2017) Water; Volume 9; Issue 2; Pages: 93 Water Water (Switzerland) 9 (2017) 2 Water (Switzerland), 9(2), 9-9 Water, 9(2): 93 Norwegian Open Research Archives DOAJ-Articles |
| ISSN: | 2073-4441 |
| Popis: | Crop growth and yield are affected by water use during the season: the green water footprint (WF) accounts for rain water, the blue WF for irrigation and the grey WF for diluting agri-chemicals. We calibrated crop yield for FAO’s water balance model “Aquacrop” at field level. We collected weather, soil and crop inputs for 45 locations for the period 1992–2012. Calibrated model runs were conducted for wheat, barley, grain maize, oilseed rape, potato and sugar beet. The WF of cereals could be up to 20 times larger than the WF of tuber and root crops; the largest share was attributed to the green WF. The green and blue WF compared favourably with global benchmark values (R2 = 0.64–0.80; d = 0.91–0.95). The variability in the WF of arable crops across different regions in Europe is mainly due to variability in crop yield (cv = 45%) and to a lesser extent to variability in crop water use (cv = 21%). The WF variability between countries (cv = 14%) is lower than the variability between seasons (cv = 22%) and between crops (cv = 46%). Though modelled yields increased up to 50% under sprinkler irrigation, the water footprint still increased between 1% and 25%. Confronted with drainage and runoff, the grey WF tended to overestimate the contribution of nitrogen to the surface and groundwater. The results showed that the water footprint provides a measurable indicator that may support European water governance. Variability in the Water Footprint of Arable Crop Production across European Regions |
| Databáze: | OpenAIRE |
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