Climate change signals in the historical water footprint of wheat production in Zimbabwe

Climate change has been posited as the biggest threat to crop productivity in agro-systems, yet its impact on the water footprints of crop production for many regions remains uncertain. This study sought to determine evidence of historical climate change (1980–2010) and its resultant impact on the b...

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Bibliographic Details
Published in:The Science of the total environment 2020-11, Vol.742, p.140473-140473, Article 140473
Main Authors: Govere, Simbarashe, Nyamangara, Justice, Nyakatawa, Ermson Z.
Format: Article
Language:English
Subjects:
Climate change variability
Crop water productivity
Crop water requirements
Water footprint
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Summary:Climate change has been posited as the biggest threat to crop productivity in agro-systems, yet its impact on the water footprints of crop production for many regions remains uncertain. This study sought to determine evidence of historical climate change (1980–2010) and its resultant impact on the blue water footprint of winter wheat production in Zimbabwe. The analysis involved assessing the impact of climate change on wheat yield and crop water requirements, the key factors determining the blue water footprint. The CROPWAT model and the global water footprint assessment (WFA) standard were used to calculate the blue water footprint. Multiple linear regression was used to correlate climate variables to wheat yield, crop water requirements and the blue water footprint. Results show a significant (p 
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2020.140473