pianc port of barranquilla access channel john headland, pianc vp, svp moffatt& nichol dr....

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