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<p>Graded vertical terminals (GVTs) are designed for environments with extreme water level fluctuations. Accurately assessing the throughput capacity of these terminals during the design phase is crucial for engineering purposes. This study analyzes the throughput capacity of GVTs based on operational areas and proposes a comprehensive three-stage evaluation framework that integrates the throughput capacity of the terminal’s waterside, storage yard, and landside. We developed two distinct algorithms to address the priorities of operating platforms: “prioritizing high-water level platform operations” and “prioritizing low-water level platform operations.” These algorithms account for the impact of the compatible water level range between adjacent operating platforms on annual operating days. For calculating terminal throughput capacity under specific conditions, we introduce methods for dividing annual operating days and annual freight volume. Case studies demonstrate the practicality of the proposed method, indicating that setting a compatible water level range between adjacent platforms can enhance terminal throughput capacity. Sensitivity analysis reveals that terminal throughput capacity is positively correlated with the ship’s hourly loading and unloading efficiency and the effective berth utilization rate, while being inversely related to auxiliary and technical operation times.</p>

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Calculation method of design throughput capacity of graded vertical terminals based on annual effective operating days

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Benfei Zhu,
  • Qiang Zhou,
  • Chenghua Ye

摘要

Graded vertical terminals (GVTs) are designed for environments with extreme water level fluctuations. Accurately assessing the throughput capacity of these terminals during the design phase is crucial for engineering purposes. This study analyzes the throughput capacity of GVTs based on operational areas and proposes a comprehensive three-stage evaluation framework that integrates the throughput capacity of the terminal’s waterside, storage yard, and landside. We developed two distinct algorithms to address the priorities of operating platforms: “prioritizing high-water level platform operations” and “prioritizing low-water level platform operations.” These algorithms account for the impact of the compatible water level range between adjacent operating platforms on annual operating days. For calculating terminal throughput capacity under specific conditions, we introduce methods for dividing annual operating days and annual freight volume. Case studies demonstrate the practicality of the proposed method, indicating that setting a compatible water level range between adjacent platforms can enhance terminal throughput capacity. Sensitivity analysis reveals that terminal throughput capacity is positively correlated with the ship’s hourly loading and unloading efficiency and the effective berth utilization rate, while being inversely related to auxiliary and technical operation times.