pianc port of barranquilla access channel john headland, pianc vp, svp moffatt& nichol dr....
TRANSCRIPT
PIANC
Port of Barranquilla Access Channel
John Headland, PIANC VP, SVP Moffatt& NicholDr. Rafael Canizares, PhD, Moffatt & Nichol
Santiago Alfageme, VP, Moffatt & Nichol
PIANC
PIANCThe Magdalena River
• Average Discharge:– Amazonas 175,000 m3/s (1)– Mississippi 17,500 m3/s (12)– Magdalena 7,200 m3/s (>20)
• Amazonas = 25 X Magdalena• Mississippi = 2.5 X Magdalena
• Sediment:– Amazonas 1,200 MT/año (1)– Mississippi 210 MT/año (7)– Magdalena 220 MT/año (6)
• Amazonas = 5.5 X Magdalena• Mississippi = 0.95 X Magdalena
Source: J. Restrepo, John Milliman 1995
PIANCAccess Channel – Design depth
• Handymax Vessel (T=33 ft, L= 200 m, B= 26 m)• 40.0 ft at entrance• 37.5 ft in channel• 36.5 ft at terminal
Source:USACE/PIANC
PIANC
Barranquilla
OBRAS DE PROFUNDIZACION DEL CANAL DE ACCESO AL PUERTO DE BARRANQUILLAOBRAS DE PROFUNDIZACION DEL CANAL DE ACCESO AL PUERTO DE BARRANQUILLA
PIANCStructure Locations
10
2
35-DiqueGuia
6
June 2011
PIANCStructure Design
• Functional design based on analytical and numerical modeling considering the number and length of structures
• Armor stone weights based on current velocities and waves
• “Falling Apron” used to accomodate scour
PIANCEspolón 1
PIANCEspolón 1
PIANCPredicted Morphology
PIANCChannel Evolution 2005-08
Profundidad (Pies por debajo de nivel del mar)
PIANCDepths 2006-2008
PIANC 52.5’
39.4’
32.8’
29.5’
24.6’
16.4’
<16.4’
PREDICTED
MEASURED
PIANC 52.5’
39.4’
32.8’
29.5’
24.6’
16.4’
<16.4’
PREDICTED
MEASURED
PIANC 52.5’
39.4’
32.8’
29.5’
24.6’
16.4’
<16.4’
PREDICTED
MEASURED
PIANC 52.5’
39.4’
32.8’
29.5’
24.6’
16.4’
<16.4’
PREDICTED
MEASURED
PIANCUniversidad del Norte/Cormagdalena
JULIO 2012
PIANC
JULIO 2012
52.5’
39.4’
32.8’
29.5’
24.6’
16.4’
<16.4’
Universidad del Norte/Cormagdalena
June 2011
July 2012
5-DiqueGuia
6
6 5-DiqueGuia
PIANC
JUNE 2011
JULY 2012
52.5’
39.4’
32.8’
29.5’
24.6’
16.4’
<16.4’
10
23
10
23
PIANCUniversidad del Norte/Cormagdalena
JULIO 2012
PIANC Areas of Concern (Uninorte/M&N - 2011)
• Entrance Channel
Universidad del Norte/Cormagdalena
PIANC
• Entrance Channel• Sediment Bar at the entrance
Universidad del Norte/Cormagdalena
Areas of Concern (Uninorte/M&N - 2011)
PIANC
Universidad del Norte/Cormagdalena
• Entrance Channel• Sediment Bar at the entrance • Discontinuity atl E0-E1
Areas of Concern (Uninorte/M&N - 2011)
PIANC
Universidad del Norte/Cormagdalena
• Entrance Channel• Sediment Bar at the entrance • Discontinuity atl E0-E1• Discontinuity at K14-K16
Areas of Concern (Uninorte/M&N - 2011)
PIANC
• Entrance Channel• Sediment Bar at the entrance • Discontinuity atl E0-E1• Discontinuity at K14-K16• Displacement downstream of Rondón island
Universidad del Norte/Cormagdalena
Areas of Concern (Uninorte/M&N - 2011)
PIANCFocus Areas of Concern
• Approach Channel• Sediment Bar• Access Channel Limitations
PIANC
APPROACH CHANNEL
PIANCApproach Angle Simulations
Simulated Conditions• 10,500 m3/s• Wind: 15 knots NW • Waves: 1 m, 8 s, NW• Transit speed 9 knots (ground
speed)
PIANCApproach Channel
• Original approach=150o degrees, lately 140o is used
• 2 sediment bars on NE side of entrance channel limit vessel draft
• A safe entrance approach manuever was developed using fast-time simulation with Pilot Input
PIANCSediment Transport Regime At Mouth
Low Q Average Q High Q
PIANC Bed Load Sediment Transport at Bocas
Desplazamiento de la isobata de 20 m entre 2007 al 2010
Source: Universidad del Norte
PIANCApproach Channel
• Dredge to 40’ November 2011(green & yellow)• By July 2012 Bars fill channel
Source: Universidad del Norte/CormagdalenaJuly 2012
PIANCFuture Work/Solutions
• Additional analyses/data to better define sediment transport
• Design a maintained sediment trap to avoid formation and growing of the sediment bars
• Continue dredging of the existing approach channel to maintain the design draft
PIANC
SEDIMENT BAR AT BOCAS DE CENIZA (K0)
PIANCSalt to Fresh water transition – Possible location of ETM
PIANCExample: January 2009 to March 2009
1. High to Medium Flow
PIANC 2. Transition to Low FlowExample: December 2009 to February 2010
PIANCExample: May 2010 to July 2010
3. Transition to High Flow
PIANCSediment transport regime at the mouth
Low Q Average Q High Q
PIANCBottom currents
Low Q Average Q High Q
PIANCStatus
• Sediment bar formed again in October 2012 after 4 months of average flows 5,500 to 6,700 m3/s
• The bar will likely erode when discharge increases to 8,000 in December
Source: Cormagdalena October, 30 2012
PIANC
Access channel limitations
PIANCAccess Channel Limitations
• Handymax: 200m, 26 m, 33 ft• Panamax: 260 m, 32 m, 39.5 ft• Post Panamax: 300m, 42 m, 46 ft• 1-way straight channel width is 2.5 to 5 x
vessel beam • Simulations are required to define the design
channel width.
PIANC
• Channel access is limited• A turning basin is problematic due to large river
sediment transport rates• Larger draft will required more training
structures that narrow the river cross section• But larger vessels need more width• Study needed to define the maximum vessel
dimension that could have safe access to Barranquilla
Access Channel Limitations
PIANC
Creative People, Practical Solutions. TM
Muchas Gracias !
Moffatt & Nichol Colombia S.A.SAvenida 9 No. 113-52, Of. 1201Bogotá D.C., ColombiaP +57.1.742.9059