Delft3D Zeebrugge model

Transcription

1 Delft3D Zeebrugge model Assessment tool for safety and accessibility studies within the framework of an integral approach Bart De Maerschalck, Joris Vanlede, Arvid Dujardin, Rosalia Delgado, Marc Willems, Katrien Eloot Delft, 1/11/2011

2 Outline Intro: Port of Zeebrugge Project description Numerical model Objectives Set up Current situation Example of case study Conclusions and ongoing research 2

3 Intro: Port of Zeebrugge 2 nd port of Belgium Nr. of ships 2010: 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 3

4 Intro: Port of Zeebrugge Source: 4

5 Intro: Port of Zeebrugge Flood Source: 5

6 Intro: Port of Zeebrugge Flood Source: Ebb 6

7 Intro: Port of Zeebrugge Siltation Source: 7

8 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 8

9 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 Seasonal averages of SPM surface concentration left: summer, right: winter, derived from 362 SeaWiFS images ( ), Source: M. Fettweis (2006), MOMO activiteitsrapport 4, MOMO/2/MF/200606/NL/AR/4 9

10 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 10

11 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 11

12 Numerical model: objectives Harbour extension and mitigation assessments 12

13 Numerical model: objectives Input for simulator studies Numerical model 13

14 Numerical model: objectives Input for simulator studies Numerical model 14

15 Numerical model: objectives Input for simulator studies Numerical model Fast-time simulator (autopilot) Real-time simulator

16 Numerical model: objectives Input for simulator studies Numerical model Fast-time simulator (autopilot) Real-time simulator 16

17 Numerical model: objectives Input physical model 17

18 Numerical model: objectives Input physical model 18

19 Numerical model: objectives Input physical model 19

20 Numerical model: objectives Input physical model 20

21 Numerical model: Set up 3D model, 6 sigma-layers Δt = 3s 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 21

22 Numerical model: Set up Bottom roughness: Manning, spatially varying Wall roughness: Partial slip, R 0 =0.15m HLES: relaxation time 15min. Background visc.: 1m²/s, uniform Vertival visc.: k-ϵ 22

23 Numerical Model: Set up 23

24 Numerical Model: Set up 24

25 Numerical Model: Calibration In situ measurements: Section ranges Fixed ADCP Meetnet Vlaamse Banken Measurement piles Buoys 25

26 Numerical model: Validation WL Reference: Measured Start: Tested: Z222; Z223; Z224 Stop: Complete TimeSeries HW LW 24/10/2006 0:00 4/11/ :30 BIAS RMSE 0 BIAS RMSE 0 BIAS RMSE 0 BIAS RMSE 0 BIAS RMSE 0 [m] [m] [m] [m] [min] [min] [m] [m] [min] [min] Wandelaar 0,05 0,26 0,33 0, ,05 0, A2B-boei -0,01 0,26 0,30 0, ,08 0, Zeebrugge -0,02 0,27 0,19 0, ,13 0, Bol van Knokke -0,03 0,25 0,14 0, ,15 0,

27 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/ :00; stop: 23/12/2006 0:30) Wandelaar (MOW0 - MVB) 0,02 0, Bol van Heist (MOW3 - MVB) 0,09 0, A2B-boei (MOW1 - IMDC) top 0,07 0, A2B-boei (MOW1 - IMDC) bottom 0,00 0, ALL 0,05 0, ADCP TRANSECTS: Veremans (21/06/2001) 0,06 0, Ingang haven - doodtij (07/08/2007) 0,01 0, Wielingen (03/08/2007) 0,12 0, ALL 0,06 0,

28 Results Current situation 28

29 Cross flow along the trajectory 29

30 Inbound sailing window 30

31 Case study: Artificial island 31

32 Artificial island 32

33 Inbound sailing window 33

34 Cross flow in front of port entrance 34

35 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 35