Post on 04-Feb-2022
Delft3D Zeebrugge model
Bart De Maerschalck, Joris Vanlede, Arvid Dujardin,
Rosalia Delgado, Marc Willems, Katrien Eloot
Delft, 1/11/2011
Assessment tool for safety and
accessibility studies within the
framework of an integral approach
Outline
• Intro: Port of Zeebrugge
• Project description
• Numerical model
• Objectives
• Set up
• Current situation
• Example of case study
• Conclusions and ongoing research
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Intro: Port of Zeebrugge
• 2nd port of Belgium
• Nr. of ships 2010: 8.863
• Total throughput: 49,6 mil. Tonnes
• Container shipping: 2.5 mil. TEU
• Transport of new cars: 1.6 mil.
• Energy harbour:
• LNG terminal
• 15% of market Western Europe
• Rapidly growing
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Intro: Port of Zeebrugge
Source: www.portofzeebrugge.be
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Intro: Port of Zeebrugge
Flood
Source: www.portofzeebrugge.be
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Intro: Port of Zeebrugge
Flood
EbbSource: www.portofzeebrugge.be
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Intro: Port of Zeebrugge
Siltation
Source: www.portofzeebrugge.be
Intro: Flood and ebb currents
• Dredging activities Flemish Government:
• Deepening navigation channel and outer port
(CDNB)
• Ship draught up till 16m
• But: strong cross currents near port entrance:
• Entrance of tall ships: inbound sailing window
limited to couple of hours
• Containerships: max cross flow 2 kn
• LNG carriers: max cross flow 1.5 kn
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Intro: Siltation
• Port of Zeebrugge: Location ~ centre of a turbidity
maximum
• Tidally driven water exchange through port entrance
• Siltation of the outer port
• Continuously dredging required: > 4 mil. Tons/year
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Seasonal averages of SPM surface concentration left: summer, right: winter, derived from 362 SeaWiFS images (1997-2004), Source: M. Fettweis (2006), MOMO activiteitsrapport 4, MOMO/2/MF/200606/NL/AR/4
Project: optimisation of maritime
access
• Initiated in 2009 under the request of the
Maritime Access Division (Flemish Government, Department
of Mobility and Public Works)
• Safety and Accessibility
• Development of integral approach for future
assessment studies:
• Physical model• Ver. Scale: 1/100 / Hor. Scale: 1/300
• Simulator studies• Real time / Fast time
• Numerical model
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Numerical model: objectives
• Assessment tool:
• Cross currents, water exchange
• High resolution
• Flexible: potential harbour extensions
• Input for ship manoeuvring simulators:
• Depth averaged (nautical equivalent)
vector maps
• Input for physical model:
• Guidance for the steering of the boundary
conditions
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• Harbour extension and mitigation
assessments
Numerical model: objectives
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Numerical model: objectives
• Input for simulator studies
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Numerical model
Numerical model: objectives
• Input for simulator studies
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Numerical model
Numerical model: objectives
• Input for simulator studies
Numerical model
Fast-time simulator
(autopilot)
Real-time simulator
Numerical model: objectives
• Input for simulator studies
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Numerical model
Fast-time simulator
(autopilot)
Real-time simulator
Numerical model: objectives
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• Input physical model
Numerical model: objectives
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• Input physical model
Numerical model: objectives
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• Input physical model
Numerical model: objectives
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• Input physical model
Numerical model: Set up
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• 3D model, 6 sigma-layers
• Δt = 3s
• 185.000 cells:• 10% inside the port
• 25% within the domain of interest
• 25% not active
• Resolution: 30m – 200m
• Boundary conditions:
• One-way nested in larger LTV-model (nested in ZuNo)
• SW: Current
• NW: Riemann
• NE: Current
Numerical model: Set up
• Bottom roughness: Manning, spatially varying
• Wall roughness: Partial slip, R0=0.15m
• HLES: relaxation time 15min.
• Background visc.: 1m²/s, uniform
• Vertival visc.: k-ϵ
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Numerical Model: Set up
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Numerical Model: Set up
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Numerical Model: Calibration
• In situ measurements:
• Section ranges
• Fixed ADCP
• Meetnet Vlaamse Banken
• Measurement piles
• Buoys
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Numerical model: Validation WL
Reference: Measured Start:
24/10/2006
0:00
Tested: Z222; Z223; Z224 Stop:
4/11/2006
16:30
Complete
TimeSeriesHW LW
BIAS RMSE0 BIAS RMSE0 BIAS RMSE0 BIAS RMSE0 BIAS RMSE0
[m] [m] [m] [m] [min] [min] [m] [m] [min] [min]
Wandelaar 0,05 0,26 0,33 0,20 -2 13 -0,05 0,17 -15 19
A2B-boei -0,01 0,26 0,30 0,21 0 10 -0,08 0,10 -21 18
Zeebrugge -0,02 0,27 0,19 0,21 4 20 -0,13 0,18 -16 16
Bol van Knokke -0,03 0,25 0,14 0,21 8 15 -0,15 0,14 -9 16
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Numerical model:
Validation Currents
Reference: Measured
Tested: Z222; Z223; Z224
magnitude direction
BIAS [m/s] RMSE [m/s] BIAS [°] RMSE [°]
FIXED ADCP:
(start: 20/12/2006 12:00; stop: 23/12/2006 0:30)
Wandelaar (MOW0 - MVB) 0,02 0,12 2 64
Bol van Heist (MOW3 - MVB) 0,09 0,19 -4 55
A2B-boei (MOW1 - IMDC) top 0,07 0,17 -3 48
A2B-boei (MOW1 - IMDC) bottom 0,00 0,13 -2 50
ALL 0,05 0,16 -1 58
ADCP TRANSECTS:
Veremans (21/06/2001) 0,06 0,22 15 78
Ingang haven - doodtij (07/08/2007) 0,01 0,11 13 65
Wielingen (03/08/2007) 0,12 0,23 5 17
ALL 0,06 0,19 11 59
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Results Current situation
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Cross flow along the trajectory
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Inbound sailing window
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Case study: Artificial island
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Artificial island
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Inbound sailing window
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Cross flow in front of port entrance
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Conclusions and ongoing
research
• Strong flood and ebb flows -> limited access
for tall ships
• Integral assessment tools are developed:
Numerical model, physical model, simulators
• Ongoing research:
• Analysis of a large number of potential
future harbour configurations
• Calibration of the physical model
• Extension of the numerical model with a
sediment transport model
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