摘要: |
The Dynamic Underkeel Clearance (DUKC) system is the focus of this paper. This innovation has increased drafts and widened tidal windows at several Australian ports since 1993, without compromising vessel safety. These improvements in port operation have provided economic benefits amounting to millions of dollars in decreased freight costs and increased cargo throughput, at a small fraction of the cost involved in gaining equivalent improvements by dredging. Since the DUKC system was first developed in 1993, ten customised versions have been commissioned by ports around Australia and New Zealand. Research and development of the DUKC system has continued during that time and has been greatly assisted by continuing interaction between harbour masters, pilots, port users and the design team. Recent major DUKC developments include: ?the application of meteorological and wave forecasting models to provide predictions of maximum drafts and tidal windows up to 36 hours prior to sailing; ?the near real-time modelling of the dynamic motions in waves of each particular ship in its actual loaded condition; ?continuous processing of real-time tide and wave data by the DUKC system, allowing predicted changes in maximum draft or tidal windows to be updated automatically during the final hours prior to sailing. Two case studies involving the application of DUKC systems and the associated benefits obtained are described. |