Spatiotemporal responses of the crop water footprint and its associated benchmarks under different irrigation regimes to climate change scenarios in China
نویسندگان
چکیده
Abstract. Adaptation to future climate change with limited water resources is a major global challenge sustainable and sufficient crop production. However, the large-scale responses of footprint its associated benchmarks under various irrigation regimes scenarios remain unclear. The present study quantified maize wheat (WF) per unit yield (m3 t−1) as well corresponding WF two Representative Concentration Pathway (RCP) scenarios, RCP2.6 RCP8.5, in 2030s, 2050s, 2080s at 5 arcmin grid level China. AquaCrop model outputs six models from Phase Coupled Model Intercomparison Project (CMIP5) input data was used simulate WFs wheat. differences among rain-fed furrow-, micro-, sprinkler-irrigated were identified. Compared baseline year (2013), will increase both RCP8.5 (by 17 % 13 %, respectively) until 2080s. 12 2080s) decrease %) 2080s, higher due CO2 concentration RCP8.5. most for crops. Relative crops, micro-irrigation sprinkler result smallest increases wheat, respectively. These water-saving management techniques mitigate negative impact more effectively. humid zone (an approximate overall average 680 m3 t−1 873 20th percentile) are %–32 than those arid (which experiences an 601 753 wheat). significant zone, where they can be high 57 percentile: 1020 648 micro-irrigated Nevertheless, not respond changes dramatically same area, especially areas agricultural development. demonstrated that observed different terms consumption, use efficiency, cannot ignored. It also lays foundation investigations into influences methods, RCPs, types on response all regions worldwide.
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ژورنال
عنوان ژورنال: Hydrology and Earth System Sciences
سال: 2022
ISSN: ['1607-7938', '1027-5606']
DOI: https://doi.org/10.5194/hess-26-4637-2022