How water saving irrigation contributes to climate change resilience—a case study of practices in China
How water saving irrigation contributes to climate change resilience—a case study of practices in China
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DOI：
10.1007/s11027-011-9316-8
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发表时间：
2012-02
影响因子：
4
通讯作者：
Xiao-Xia Zou;Yu’e Li;Qingzhu Gao;Y. Wan
中科院分区：
文献类型：
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作者：
Xiao-Xia Zou;Yu’e Li;Qingzhu Gao;Y. Wan
气候系统变暖现已成为不争的事实。有效应对气候变化应包括减缓和适应。水对于人类生存和社会发展至关重要。但水资源短缺是一个世界性问题，在中国，气候变化加剧了这一问题。为了找出如何成功应对气候变化的方法，本研究以2007-2009年中国统计数据为基础，定量分析了节水灌溉（WSI）在应对气候变化中的作用。研究表明，节水灌溉（WSI）可以成为应对气候变化的有效推动者。从减排角度来看，3年二氧化碳减排总量为34.67（21.83 ~ 47.48）Mt，每年约11.56（7.28 ~ 15.83）Mt。从适应角度看，2007-2009年节水总量为96.85（61.81~129.66）Gm3。如果单位农田灌溉量取3年平均农业用水量，2009年节水量足以额外灌溉5.70（3.80 ~ 7.80） Mhm2，或增加粮食产量22.04（14.68 ~ 30.15）Gt。此外，WSI 可以减少土壤盐碱化并保护土壤，以维持土地生产力和环境效益。因此，如果部署得当，WSI 可以成为应对气候变化的积极措施。然而，此类做法的成本和当地背景需要进一步研究。
A warming climate system is now an indisputable fact. An effective response to climate change should include both mitigation and adaptation. Water is essential to human survival and social development. But the shortage of water resources is a worldwide problem, which in China has been exacerbated by climate change. In order to find out how to cope with climate change successfully, this study, on the basis of China statistical data 2007–2009, quantitatively analyzes the role of water saving irrigation (WSI) in addressing climate change. The study shows that water saving irrigation (WSI) can serve as a useful enabler in dealing with climate change. From the perspective of mitigation, the 3-year total CO2emission reduction stands at 34.67 (21.83 ~ 47.48) Mt, about per year 11.56(7.28 ~ 15.83)Mt. From the perspective of adaptation, the total water saved from 2007 to 2009 stands at 96.85 (61.81 ~ 129.66) Gm3. If per unit farmland irrigation takes a 3-year average of agricultural water consumption, the water saved in 2009 is enough to irrigate additional 5.70 (3.80 ~ 7.80) Mhm2, or to increase the grain yield by 22.04 (14.68 ~ 30.15) Gt. In addition, WSI can reduce soil salinization and conserve soil to sustain land productivity and environmental benefits. So WSI can be a positive measure in coping with climate change when it is rightly deployed. However, the costs and local context of such practices call for further studies.