Exploring Agricultural Water-saving Regionalization Based on the Water-energy Nexus:A Case Study of Shanghai
[Objective]Analyze the water-saving and energy-saving potential of different types of agricultural irri-gation area.[Method]We took Shanghai as an example to explore the theoretical framework of agricultural wa-ter-saving regionalization based on the analysis of water-energy nexus. Ward cluster analysis method was intro-duced to the town-type scale cluster analysis.[Result]Based on the results of the case study, Shanghai was divid-ed into 4 agricultural irrigation types, and the targeted management strategies were discussed in this article. The main conclusions were as follow:①Higher investment in water-saving technology and infrastructure could im-prove the agricultural water use efficiency and also tended to increase energy consumption and carbon emissions, it restricted the comprehensive agricultural water-saving benefits;②For the small-scale decentralized agricultural irrigation district, implementing the energy and water pricing mechanism would be conducive to improve agricul-tural water and energy efficiency; ③Small-scale decentralized agricultural irrigation districts merged into large one could achieve tiny water-saving benefits but may reduced the energy efficiency of agricultural irrigation sys-tems;④ The utilization of agricultural water-saving irrigation technology and facilities with different level of en-ergy intensity should be followed by local conditions.[Conclusion]Exploring agricultural water-saving regional-ization based on the water-energy nexus can improve the benefits of agricultural water-saving and energy-saving and provide management strategies for Shanghai and other places in Yangtze River Delta.
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