SPAC to Improve Port Performance for Seaports with Very Long One-Way Entrance Channels
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 140, Issue 4
Abstract
Very long one-way traffic (VLOWT) entrance channels have become bottlenecks for China’s seaports. However, the high costs and complexity of channel expansion make it impractical to expand a typical channel to a two-way traffic channel. Therefore, to improve port performance a ships-passing anchorage (SPAC) is proposed, which provides a temporary mooring for lower-priority ships to wait until other ships traveling in the opposite direction pass beyond the SPAC. To explore the feasibility of building a SPAC and to determine its dimensions, the annual average turnaround time, average waiting time, and average waiting time/average service time ratio were chosen as the performance measures of port service. Then, considering randomness and dynamics in ship operations, a model to simulate ships moving in and out of a harbor through a VLOWT channel with a SPAC was developed, and the port performance was calculated. Finally, the proposed model was applied to a cargo-import port with a VLOWT channel. The results show that a SPAC improves port performance and effectively saves dredging costs, and that the simulation model is an efficient tool to determine proper SPAC design.
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Acknowledgments
This research was supported by the National Natural Science Foundation, China (Project Nos. 51109030 and 51079022) and the Fundamental Research Funds for the Central Universities [Project No. DUT11RC (3)66].
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 140 • Issue 4 • July 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Aug 4, 2013
Accepted: Nov 22, 2013
Published online: Nov 25, 2013
Published in print: Jul 1, 2014
Discussion open until: Jul 25, 2014
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