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Chapter 4: Considerations at System Level
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Chapter 4: Considerations at System Level

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4. Considerations at System Level

4. Considerations at System Level

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  • 1. Vermelding onderdeel organisatie February 1, 2012 1 Chapter 4: Considerations at systems level ct5308 Breakwaters and Closure Dams H.J. Verhagen Faculty of Civil Engineering and Geosciences Section Hydraulic Engineering
  • 2. February 1, 2012 2 Functions of breakwaters • protection against waves • protection of port and shipping under normal conditions • protection of ports under extreme conditions • shore protection • guiding of currents • protection against shoaling • provision of dock and quay facilities
  • 3. February 1, 2012 3 Allowable wave heights Type of vessel Maximum Hs in m at the berth Pleasure craft Fishing vessel Dredges and dredge barges General cargo (<30.000 dwt) Dry bulk cargo (30.000 dwt) Dry bulk cargo (<100.000 dwt) Oil tankers (<30.000 dwt) Oil tankers (<200.000 dwt) Oil tankers (<300.000 dwt) Passenger vessels 0.15 – 0.25 0.40 0.80 – 1.00 1.00 – 1.25 1.00 – 1.25 1.50 1.00 – 1.25 1.50 – 2.50 2.50 – 3.00 0.70 data from Thoresen, 1988
  • 4. February 1, 2012 4 harbour of Marseilles
  • 5. February 1, 2012 5 Breakwater at the Europort entrance
  • 6. February 1, 2012 6 A system of detached breakwaters at Fiumicino, Italy
  • 7. February 1, 2012 7 Flow pattern at the Europort entrance
  • 8. February 1, 2012 8 Entrance to the port of Abidjan
  • 9. February 1, 2012 9 Flow pattern at the port of Abidjan
  • 10. February 1, 2012 10 Port and breakwaters of IJmuiden
  • 11. February 1, 2012 11 Siltation at the entrance to the port of Paradip, India
  • 12. February 1, 2012 12 Functions of closure dams • land reclamation • shortening of the length of sea defence • creating fresh water reservoir • creation of tidal energy basin • creation of a fixed level harbour basin • creation of a construction dock • providing road or railroad • repair a dike breach • control of upland flow • creating fish ponds • cutting of river bends
  • 13. February 1, 2012 13 The Rhine Meuse delta before the year 1000
  • 14. February 1, 2012 14 Situation after damming the river Meuse
  • 15. February 1, 2012 15 Situation after the St.Elisabeth’s Flood
  • 16. February 1, 2012 16 The Biesbosch area
  • 17. February 1, 2012 17 The Afsluitdijk and the tidal range
  • 18. February 1, 2012 18