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• W4315702303 endingPage "109315" @default.
• W4315702303 startingPage "109315" @default.
• W4315702303 abstract "Meteorological factors and human activities (such as changes in crop area) have exerted great impacts on the agricultural water resources. A thorough understanding of the changes in crop water requirements (CWR) and irrigation water requirements (IR) is crucial for effective agricultural water management. In the present study, the unit area and total volume of winter wheat CWR and IR were estimated based on meteorological and crop area data, and spatiotemporal variations were analyzed from 2001 to 2018 in the lower reaches of the Yellow River Basin. The impacts of meteorological factors and crop area changes on the CWR and IR variations were explored using sensitivity analysis and the logarithmic mean Divisia index method along with the identification of the main driving factors. The results revealed that both the unit area CWR and IR exhibited a decreasing trend with a multi-year average value of 540 mm and 488 mm, respectively, and increased gradually from south to northwest in the spatial distribution. The significant decrease in wind speed exerted the greatest impact on the unit area CWR and IR changes with the highest sensitivity among considered meteorological factors. The total volume of CWR and IR increased by 56.5 × 108 m3 and 32.3 × 108 m3 from 2001 to 2018, respectively. The crop area change of winter wheat was a major contributor to the variations in total volume of CWR and IR rather than meteorological factors during the study period, and evident spatial and temporal differences were observed. The results of this study provide valuable insights for developing adaptive strategies considering the impacts of meteorological factors and planted crop area changes and can therefore contribute to the sustainable utilization and management of agricultural water resources." @default.
• W4315702303 created "2023-01-12" @default.
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• W4315702303 date "2023-03-01" @default.
• W4315702303 modified "2023-09-28" @default.
• W4315702303 title "Impacts of meteorological factors and crop area changes on the variations in winter wheat water requirements in the lower reaches of the Yellow River Basin" @default.
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• W4315702303 doi "https://doi.org/10.1016/j.agrformet.2023.109315" @default.
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