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Paul Moeyaert

Key contribution of Oceanographic research in providing an economic solution to Zeebrugge’s lack of hinterland connectivity. Paul Moeyaert. Wave measurement. Solutions:. Noorderkanaal Dockships “extended” estuair regime. Access to the network of inland waterways from Zeebrugge:.

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Paul Moeyaert

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  1. Key contribution of Oceanographic research in providing an economic solution to Zeebrugge’s lack of hinterland connectivity Paul Moeyaert

  2. Wave measurement

  3. Solutions: • Noorderkanaal • Dockships • “extended” estuair regime

  4. Access to the network of inland waterways from Zeebrugge: • Traditional inlandwater tankers • Provided “good’ weather • Coasters • But too high requirements • And high investment/operational costs Due to lack of reliable knowledge of the risk-level

  5. Extended Estuair • Based on Risk analyses • Simulation of ships motions and behaviour as a response to the 10years wave spectra: in the particular sea area

  6. Statistical distribution of occurances of dangerous situations • Slamming • Greenseas • Rolling • Bending moment

  7. Acceptable frequency • Bending moment : once a life time • Slamming: once per year • Green seas : once per life time

  8. Iterative process of design If the number of incidents proves to be too high : 2 possible actions: • Restrict the allowable weather conditions • And/or • Increase strength • Optimum solution

  9. Relative vertical motion of point : fore, keel exceeding draft fore: number of exceedings per trajectory as a function of significant wave height in measured directional wave spectra Bol van Heist, Western Scheldt – Zeebrugge

  10. Significant Wave Height • Is a far more accurate criterion for reflecting the risks compared to the old yardstick : Beaufort Number • As basis for designing ships • But also as a criterium for the captain: whether to make the voyage or the wait for better circumstances

  11. Further possible improvements • Accuracy of predictions on medium term • Directional predictions • Distinction between: • Swell • Caused by remote storms • Long waves, traveling at known speed • well predictable • Local waves • Same predictability like the local wind • Shortcrested waves

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