Rising agricultural water scarcity in China is driven by expansion of irrigated cropland in water scarce regions
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Journal Title
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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2022-10-21
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Language
en
Pages
15
1139-1152
1139-1152
Series
One Earth, Volume 5, issue 10
Abstract
Increasing agricultural water scarcity is threatening food security and ecosystem sustainability in China. Previous studies showed a deceleration in the growth of irrigation water use in China due to reducing water use intensities of irrigation. However, a finer-scale analysis at the prefecture level is urgently needed to account for the impacts of land management policies and the impact of international food trade in water stress mitigation. Here, we address these gaps and demonstrate that the scarce irrigation water use trend reversed to rising after 2011 through shifting to irrigated cropland, even if grain import reduced water stress at the national scale, and we highlight the specificity of relationships between scarce water use and irrigated cropland change at both the river-basin and prefecture scales. These results call for an urgent re-evaluation of the implementation guidelines of China's Land Requisition-Compensation Balance policy on scarce irrigation water use.Description
Funding Information: This work is funded by the National Natural Science Foundation of China ( 42201301 ), Innovative Research Group Project of the National Natural Science Foundation of China ( 71921003 ), Special Fund of Jiangsu Province Carbon Peak and Carbon Neutral Technology Innovation ( BK2022037 ), and joint PhD student program of China Scholarship Council ( 201906190113 ). Publisher Copyright: © 2022 Elsevier Inc.
Keywords
irrigated cropland expansion, scarce irrigation water, spatial decomposition analysis, water-land nexus
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Citation
Qi, X, Feng, K, Sun, L, Zhao, D, Huang, X, Zhang, D, Liu, Z & Baiocchi, G 2022, ' Rising agricultural water scarcity in China is driven by expansion of irrigated cropland in water scarce regions ', One Earth, vol. 5, no. 10, pp. 1139-1152 . https://doi.org/10.1016/j.oneear.2022.09.008
