globalchange  > 气候变化与战略
DOI: 10.1016/j.scitotenv.2020.136585
论文题名:
Increased crop water requirements have exacerbated water stress in the arid transboundary rivers of Central Asia
作者: Ruan H.; Yu J.; Wang P.; Wang T.
刊名: Science of the Total Environment
ISSN: 489697
出版年: 2020
卷: 713
语种: 英语
英文关键词: Arid transboundary rivers ; Central Asia ; Climate and cultivated land change ; Crop water requirement ; Syr Darya Basin
Scopus关键词: Crops ; Land use ; Rivers ; Sensitivity analysis ; Sustainable development ; Water management ; Central Asia ; Crop water requirements ; Cultivated lands ; Syr Darya Basin ; Trans-boundary rivers ; Climate change ; arid environment ; climate change ; land use change ; river basin ; river water ; spatiotemporal analysis ; water resource ; water stress ; water use ; agricultural parameters ; alfalfa ; Article ; Asia ; Central Asia ; climate change ; controlled study ; crop planting structure ; crop water requirement ; cultivated land ; fallow ; Gossypium ; land use ; maize ; meteorological phenomena ; orchard ; prediction ; priority journal ; rice ; river ; river basin ; spatiotemporal analysis ; sunflower ; vegetable ; water stress ; water supply ; wheat ; Central Asia ; Syr Darya Basin
英文摘要: Water scarcity and ecological degradation as a result of the expansion of irrigated agriculture in arid regions have become global issues. A better understanding of the changes in crop water requirements (CWRs) is important for promoting sustainable development, particularly the water resource management of transboundary rivers. In this study, the latest and complete meteorological station and crop area data, the CropWat model, and the slope method were used to estimate the CWR in the Syr Darya Basin (SDB) of Central Asia from 2000 to 2018. The spatiotemporal variation of the water requirements for primary crops at the city scale was first assessed. The impacts of climate and cultivated land change on the CWR were quantified, and the associated impacts of the CWR on the water resources and environment were discussed. The results revealed that the mean unit area CWR of the SDB was 944.1 mm and the rate of increase was 7.6 mm/a from 2000 to 2018. The area of the primary crops expanded by 5851.6 km2, and the total CWR increased at a mean rate of 2.0 × 108 m3/a, with the majority of this change being concentrated between 2010 and 2018. By 2018, the total CWR reached 194.8 × 108 m3. The lower reaches of the SDB were associated with a high CWR and a high rate of increase. Along with the reduction in basin water resources, the increased CWR has exacerbated the water stress in the SDB. Sensitivity analysis indicated that the dominant factors influencing the change in the CWR are cultivated land change (65.0%) and climate change (35.0%). Owing to a reasonable crop planting structure, the middle reaches maintained a relatively low CWR and rate of increase. Given the predicted changes in climate, optimizing crop planting structure and controlling the expansion of cultivated land in order to reduce the CWR can help to mitigate water scarcity. © 2020
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158384
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作者单位: Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China

Recommended Citation:
Ruan H.,Yu J.,Wang P.,et al. Increased crop water requirements have exacerbated water stress in the arid transboundary rivers of Central Asia[J]. Science of the Total Environment,2020-01-01,713
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