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| DOI：10.13522/j.cnki.ggps.2025048 |
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| Coordination and drivers of water-food-ecology nexus in the Hetao Irrigation District |
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WANG Nan, ZHANG Fengran, LIU Shufang, WANG Youzhi
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1. College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China; 2. Yellow River Institute of Hydraulic Research, Yellow River Conservancy Commission, Zhengzhou 450003, China; 3. Yellow River Laboratory, Zhengzhou 450003, China
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| Abstract: |
| 【Objective】The conflicts in water use between agriculture and maintaining ecological function pose a challenge in the Hetao Irrigation District in Inner Mongolia. Excessive water-saving agriculture may cause the water-food-ecological nexus to lose balance. This paper evaluates how to coordinate the water-food-ecological nexus to support sustainable and high-quality development in the district.【Method】We developed a comprehensive evaluation index to analyze the water-food-ecology nexus in the district. The weights for subsystems in the nexus were determined using the entropy weighting method. The degree of coordination from 2009 to 2022 for all three subsystems was assessed using a coupling coordination model, in which the abrupt changes in the coordination were detected using the Mann-Kendall (M-K) method. The driving forces in the coupling coordination were analyzed using a multi-factor attribution approach.【Result】① The comprehensive evaluation index of the water-food-ecology nexus showed an increasing trend during the study period. ② From 2009 to 2022, the nexus remained largely stable, with all three subsystems showing high level of coupling prior to an abrupt change in 2019. From 2009 to 2022, the coupling coordination degree increased from 0.688 to 0.844, changing from primary level to well-coordinated level. ③Before the abrupt change in 2019, the driving forces of the three subsystems were similar, while after the abrupt change, the ecological subsystem became the dominant factor driving the increase in the coupling coordination.【Conclusion】We provide a systematic assessment of the water-food-ecological nexus in the Hetao Irrigation District, helping improve water resource management and develop sustainable and ecologically friendly agriculture in the district. |
| Key words: Hetao Irrigation District; water, food and ecology; coupled coordination; driving factors; abrupt variation: multifactorial attribution approach |
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