| 引用本文: | 赵思翔,王 伟,刘艺琳,等.基于虚拟水视角的四川省农业水资源压力时空演化[J].灌溉排水学报,2023,42(10):85-90. |
| ZHAO Sixiang,WANG Wei,LIU Yilin,et al.基于虚拟水视角的四川省农业水资源压力时空演化[J].灌溉排水学报,2023,42(10):85-90. |
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| 摘要: |
| 【目的】探明四川省作物虚拟水流动对农业水资源压力产生的间接影响及其时空演化格局。【方法】以四川省内种植的16种作物为研究对象，基于AquaCrop模型模拟2000—2018年四川省各市（州）作物生产水足迹，基于每年作物产品供需平衡和最优运输成本法量化省际间作物贸易格局，分析各市（州）主要作物虚拟水流动平衡格局，解析作物虚拟水流动对四川省农业水资源压力的影响。【结果】2000—2018年，四川省多年平均作物生产水足迹为284亿m3/a，各市（州）作物生产总水足迹呈波动上升趋势，其中乐山市作物生产总水足迹变化幅度最大。四川省为作物虚拟水净输入地区，虚拟水净输入量整体呈上升趋势，西部作物虚拟水净输入量高于东部。作物虚拟水流动缓解了各市（州）农业水资源压力，因虚拟水输出导致水资源压力小幅度增加的地区由2000年的4个市（德阳市、资阳市、遂宁市和绵阳市）减少至2018年的1个市（资阳市）。【结论】根据各市（州）水资源分布现状与作物耗水规律进行种植结构调整、田间管理优化和虚拟水贸易调控，综合考虑实体水配置和虚拟水贸易可有效缓解四川省农业水资源压力。 |
| 关键词: 作物生产水足迹；时空演变；虚拟水；农业水资源压力；四川省 |
| DOI：10.13522/j.cnki.ggps.2023191 |
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| Spatiotemporal Evolution in Agricultural Water Stress in Sichuan Province Evaluated from the Perspective of Virtual Water |
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ZHAO Sixiang, WANG Wei, LIU Yilin, ZHANG Ping, ZHANG Huimin
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1. College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya’an 625014, China;
2. The Research Center of Soil and Water Conservation and Ecological Environment,
Chinese Academy of Sciences and Ministry of Education, Yangling 712100, China;
3. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China
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| Abstract: |
| 【Objective】This paper aims to assess the indirect influence of virtual water flow on metropolitan-scale agricultural water stress in Sichuan province. It investigates the spatiotemporal variation in this context, elucidating how persistent growth in agricultural water use and the movement of virtual water through agricultural products across the province indirectly impacts regional water stress.【Method】The AquaCrop model was employed to calculate the water footprint of 16 different crops from 2000 to 2018 in all metropolitan cities within the province. The calculation of inter-province virtual water flow was based on annual balance between crop production and food demand, by considering the minimum transportation costs cross the province. These calculated results were then used to analyze the influence of virtual water flow on agricultural water stress. 【Result】From 2000 to 2018, the average water footprint of crop production in Sichuan was estimated to be 28.4 billion cubic meters per year. The total water footprint of crop production in the province exhibited a fluctuation during the studied period, with the most notable change observed in Leshan. The province experienced a net increase in virtual water inflow, with the Western areas receiving more inflow than the Eastern regions. The continuous influx of virtual water has contributed to the alleviation of agricultural water stress in the province, reducing the number of cities experiencing increased water stress due to virtual water outflows from four in 2000 to one in 2018.【Conclusion】The analysis of physical and virtual water highlights the need for Sichuan province to enhance the regulation and optimization of virtual water trade as a means to mitigate agricultural water stress. |
| Key words: water footprint of crop production; spatiotemporal evolution; virtual water; agricultural water stress; Sichuan Province |
