ERA5-based global assessment of irrigation requirement and validation.
While only 20% of harvested lands are actually irrigated, 40% of global agricultural production originates from irrigated areas. Therefore, assessing irrigation requirements is essential for the development of effective water-related policies for an efficient management of water resources. Moreover,...
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Public Library of Science (PLoS)
2021-01-01
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| Series: | PLoS ONE |
| Online Access: | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0250979&type=printable |
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| author | Matteo Rolle Stefania Tamea Pierluigi Claps |
| author_facet | Matteo Rolle Stefania Tamea Pierluigi Claps |
| author_sort | Matteo Rolle |
| collection | DOAJ |
| description | While only 20% of harvested lands are actually irrigated, 40% of global agricultural production originates from irrigated areas. Therefore, assessing irrigation requirements is essential for the development of effective water-related policies for an efficient management of water resources. Moreover, global-scale analyses are becoming increasingly relevant, motivated by globalized production and international trade of food as well as by the need of common strategies to address climate change. In this study, a comprehensive model to estimate crop growth and irrigation requirements of 26 main crops at global scale is presented. The model computes a soil water balance using daily precipitation and reference evapotranspiration based on a high-resolution ERA5 reanalysis dataset from the European Copernicus Program. The irrigation requirement, defined as the minimum water volume to avoid water stress, is computed for year 2000 at the resolution of 5 arc-min (or 0.0833°) and aggregated at different spatial and temporal scales for relevant analyses. The estimated global irrigation requirements for 962 km3 is described in detail, also in relation to the spatial variability and to the monthly variation of the requirements. A focus on different areas of the world (California, Northern Italy and India) highlights the wealth of information provided by the model in different climatic conditions. National data of irrigation withdrawals have been used for an extensive comparison with model results. A crop-specific validation has also been made for the State of California, comparing model results with local data of irrigation volume and independent estimates of crop water use. In both cases, we found a good agreement between model results and real data. |
| format | Article |
| id | doaj-art-de1bd336fc614f78af8bd0c30b69c51d |
| institution | OA Journals |
| issn | 1932-6203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Public Library of Science (PLoS) |
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| series | PLoS ONE |
| spelling | doaj-art-de1bd336fc614f78af8bd0c30b69c51d2025-08-20T02:17:48ZengPublic Library of Science (PLoS)PLoS ONE1932-62032021-01-01164e025097910.1371/journal.pone.0250979ERA5-based global assessment of irrigation requirement and validation.Matteo RolleStefania TameaPierluigi ClapsWhile only 20% of harvested lands are actually irrigated, 40% of global agricultural production originates from irrigated areas. Therefore, assessing irrigation requirements is essential for the development of effective water-related policies for an efficient management of water resources. Moreover, global-scale analyses are becoming increasingly relevant, motivated by globalized production and international trade of food as well as by the need of common strategies to address climate change. In this study, a comprehensive model to estimate crop growth and irrigation requirements of 26 main crops at global scale is presented. The model computes a soil water balance using daily precipitation and reference evapotranspiration based on a high-resolution ERA5 reanalysis dataset from the European Copernicus Program. The irrigation requirement, defined as the minimum water volume to avoid water stress, is computed for year 2000 at the resolution of 5 arc-min (or 0.0833°) and aggregated at different spatial and temporal scales for relevant analyses. The estimated global irrigation requirements for 962 km3 is described in detail, also in relation to the spatial variability and to the monthly variation of the requirements. A focus on different areas of the world (California, Northern Italy and India) highlights the wealth of information provided by the model in different climatic conditions. National data of irrigation withdrawals have been used for an extensive comparison with model results. A crop-specific validation has also been made for the State of California, comparing model results with local data of irrigation volume and independent estimates of crop water use. In both cases, we found a good agreement between model results and real data.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0250979&type=printable |
| spellingShingle | Matteo Rolle Stefania Tamea Pierluigi Claps ERA5-based global assessment of irrigation requirement and validation. PLoS ONE |
| title | ERA5-based global assessment of irrigation requirement and validation. |
| title_full | ERA5-based global assessment of irrigation requirement and validation. |
| title_fullStr | ERA5-based global assessment of irrigation requirement and validation. |
| title_full_unstemmed | ERA5-based global assessment of irrigation requirement and validation. |
| title_short | ERA5-based global assessment of irrigation requirement and validation. |
| title_sort | era5 based global assessment of irrigation requirement and validation |
| url | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0250979&type=printable |
| work_keys_str_mv | AT matteorolle era5basedglobalassessmentofirrigationrequirementandvalidation AT stefaniatamea era5basedglobalassessmentofirrigationrequirementandvalidation AT pierluigiclaps era5basedglobalassessmentofirrigationrequirementandvalidation |