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Chinese Journal of Management Science ›› 2026, Vol. 34 ›› Issue (5): 153-165.doi: 10.16381/j.cnki.issn1003-207x.2024.1091

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Research on Cooperative Strategy of Ship Crossing Dam for Traffic Congestion of Cascade Lock

Pan Gao, Zeao Xu, Xueying Zhang, Xu Zhao()   

  1. College of Economics and Management,China Three Gorges University,Yichang,443002,China
  • Received:2024-07-01 Revised:2024-12-25 Online:2026-05-25 Published:2026-04-21
  • Contact: Xu Zhao E-mail:zhaoxu@ctgu.edu.cn

Abstract:

Aiming at the vessel navigation congestion problem caused by the bottleneck effect of stepped locks, congestion charging and differential dam-over subsidy mechanism are introduced to enhance the shipping efficiency. Firstly, based on the dynamics of ships crossing the locks in a cycle, and the difference of the ideal time interval between two locks in a row, a double bottleneck model without charging is established, and the total cost of the system is derived under different scenarios; and then, through the establishment of the optimal charging equilibrium model, the congestion charge is taken as the subsidy for dam overturning, and the two-line linkage mechanism of ‘crossing the locks and overturning the dams’ is put forward. Then, by establishing the optimal toll equilibrium model and taking the congestion fee as the dam-over subsidy, a two-lane linkage mechanism of ‘gate crossing + dam-over’ is proposed to realise the synergy of navigable vessels crossing dams. It is shown that: toll management can effectively reduce the social cost of ship navigation and alleviate the congestion problem in front of the dam, and the dam-over subsidy can effectively promote the transfer of the dam-over mode; navigation managers can regulate the capacity of the downstream bottleneck when the upstream and downstream ships are not balanced to avoid the backlog of ships between the locks of the ladder level, so as to make effective use of the capacity of the dam-over; at the same time, by giving the larger tonnage ships a higher priority for the lock-over system, the function of the dam-over system can be brought into full play, and the total number of ships crossing the dams can be increased. At the same time, giving higher priority to larger tonnage ships can give full play to the function of the over-dam system and increase the total number of ships crossing the dam.

Key words: waterway transportation, ship management, series bottleneck, congestion pricing, subsidy for dam overturning

CLC Number: