Study on flow resilience of air traffic in Beijing-Guangzhou Corridor:A comparison between original network and optimized network
The Beijing-Guangzhou Corridor is an important project in China's 13th Five-Year Civil Aviation Plan(2016-2020),which aims to adjust the airspace structure and release the airspace carrying capacity on a macro scale,and it is expected to improve the resilience of air traffic flow.In this paper,a combined evaluation framework of air traffic flow resilience is constructed to analyze the changes of air traffic resilience before and after the opening of the Beijing-Guangzhou Corridor by using delay data of track,and then reveal its internal mechanism.Comparing the original network with the optimized network,we found that the vulnerable nodes and segments were transferred from the central airport and its associated segments along the route to the peripheral participating airports and associated segments.In the optimized network,the number and scope of delay propagation dependent paths were reduced and the delay propagation dependent chain was loosened.The spatial structure of delay dependence risk tended to be multi-source network mode,which reduced the polarization state of aviation flow network and enhanced the balance.The original"axial belt"model of the delay risk of the central airport along the route is improved.The flow resilience of the optimized Beijing-Guangzhou Corridor has been significantly improved.It is also found that compared with connecting new airports and adding new routes,the gain effect of releasing idle airspace resources and blocking delay propagation is more significant when new routes are created.Giving priority to developing new paths to improve the flow capacity of vulnerable nodes and segments will help the air flow network to further have the ability of delay absorption and recovery,which will significantly release airspace resources and improve the resilience level of air flow.While building the air route cluster system,the Beijing-Guangzhou Corridor realizes the function transformation of airspace system and the full development and utilization of airspace resources.The study of air flow resilience will provide theoretical reference for the optimal allocation of airspace resources.In the future,the flow resilience research should be carried out in parallel with China's corridors,aiming at the path combination with high delay risk,so as to cope with the interaction impact of flow resilience brought by the coupling of national air flow network.
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