STUDY ON THE COUPLING COORDINATION OF WATER-ENERGY-FOOD-LAND SYSTEM IN HENAN PROVINCE
To explore the impact of land use change on the coupling and coordination of regional water-energy-food-land system in Henan province.By constructing an evaluation index system of water-energy-grain-land coupling and coordinated development,the entropy method and coupled coordination model were used to study the coupling and coordinated development changes of water-energy-food system before and after it was incorporated into the land subsystem in 18 cities in Henan province from 2010 to 2020,and used ArcGIS to analyze the impact of land use change on the spatial distribution of regional coupling coordination.The results showed that:(1)The addition of land subsystem reduced the overall change amplitude of the C value of the coupling degree of water-energy-food-land system in various cities in Henan province,the aggregation degree of the temporal series change curve of the D value of the coupling coordination degree increases,and the change path of the coupling coordination degree of various cities was more uniform.(2)With the addition of the land subsystem,the chaos of the coupling and coordination level of water-energy-food-land system in various cities in Henan province had been significantly reduced,and the impact would be mainly negative in the early stage,and then the positive and negative effects would cancel each other,and a large number of phenomena would remain unchanged in the original level,and the positive impact will be highlighted in the later stage.(3)The addition of the land subsystem made the spatial change of the coupling coordination grade in various cities in Henan province more orderly,and the distribution center of the coordination class level realized a smooth transition from east to west,and the distribution range continued to expand.The proportion of imbalance levels gradually decreased,and the coupling coordination of water-energy-food-land systems in various cities generally improved.The rational use of land can improve the coupling and coordination of regional water-energy-food-land system and promote regional sustainable development.
water-energy-foodland usecoupling coordinationresource allocationHenan province
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