Abstract:Entrance area of shiplock approach channel is the throat for the navigation of ships. With the influences of special
boundary conditions,there is a great deal of flow patterns such as inclined flow,crossflow and reflux at the entrance area,
which cause a big influence for navigation safety. This paper analyses the effect of the bad flow patterns at the entrance area on
ship navigation,and the improvement mechanism of flow conditions by diversion pier to weaken the inclined flow and reflux at
the entrance of approach channel. The results show that the diversion pier or other engineering measures with diversion pier
together is an effective engineering measure for improving the flow condition at the entrance of approach channel.
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