Coupling mutual information into ecological networks to analyze the sustainability of water-energy nexus: A case study of Yangtze River Economic Belt

Efficient utilization and sustainability of water and energy resources are crucial for promoting socio-economic sustainable development. This study constructed a hybrid network using input-output tables and integrated the theory of mutual information into the ecological network analysis method to analyze the cycling efficiency, robustness, symbiotic relationships, and synergistic development of water -energy networks. The results of case study indicate that the cycling efficiency of the water -energy networks in the Yangtze River Economic Belt (YEB) exceeds 50%, and their robustness is at a certain distance from the equilibrium point, with some provinces (cities) facing the risk of development stagnation. The water and energy networks primarily exhibit a moderate symbiotic relationship, wherein mutual development coexists with certain competition. In conclusion, water and energy are interdependent and require coordinated development. Finally, recommendations for achieving synergy between water and energy are proposed from the perspectives of industry sectors.