port capacity versus port safety by r. groenveld

Seminar Buenos Aires, 2004

Port Capacity Versus Port Safety

byR. Groenveld


Methodology

Traffic flow simulationmodel

HARBOURSIM

Data entrance ,dwelll times berths,

departure times

SHIPRISK model

Data number ofpotential encountersper category and per

location

Estimation number ofcasualties per category

per location

Historicaldata

casulaties

Estimation nautical riskHistorical data

damage costs percasulty category

Dataportconfiguration

and trafiiccharacteristics

Nautical risk percasulty type

Step 1 Estimationnumber

encounters

Step 2Estimation number

of casualties

Step 3Estimation

nautical risks

Manoeuvring simulationmodels

model Navigator

TrafficRules


Safety and Capacity Studies

• Manoeuvring simulation study - dimensions wet area and - the

accompanying ship traffic rules • Traffic flow simulation study -

estimation wet infrastructure capacity

- number of berths • Ship Risk model -

determines the number of encounters -and with historical data the number of casualties


Gulf of Venezuela

Tablazo Bay

project location

Figure 1 Project Location

San Bernardo

Zapara

Puerto America, Venezuela

Seminar Buenos Aires, 2004 Site Puerto America


1

3

42

5


Figure 10. Track plot of tanker arrival in deep water port

Berthing Manoeuvre in the deep water portRESULTS:

-Safe interval times

-Blockage times of TB

-Berthing and deberthing times

-

Manoeuvring Simulation Model

VESSEL:

Cape size crude tanker


Model HarboursimInput: Random arrivals of the different ship types, traffic rules, dwell times, sailing times etc.

Simulation: Ship traffic through the port

Output: Entrance time and departure time from the terminal, waiting times of the vessels, satisfying: 1. The traffic rules 2. Availability of a berth 3. Tidal conditions

4. Etc


Oil terminal, 4 berths, terminal 1SHIPTYPE OIL1 OIL2 OIL3 OIL 4 OIL 5 OIL6DWT range 5000-35000 35000-84000 65000-97500 95000-138750 125000-168750 145000-198750

SERVT [h] 8.0 15.9 20.3 19.6 23.4 26.5

number 205 208 154 106 85 72

i.a.t [min] 2564 2527 3413 4958 6184 7300

Coal terminal, 2 berths, terminal 3SHIPTYPE COAL 7 COAL8DWT range 5000-35000 121500-185625

SERVT [h] 6.7 39.1

number 80 141

i.a.t [min] 6570 3728

Petro chemical terminal, 1 berth, terminal 2SHIPTYPE PETRO 9 PETRO10DWT range 5000-30000 30000-50000

SERVT [h] 7.5 12.0

number 98 143

i.a.t [min] 5363 3676

Boundary conditions, Puerto America 2015, 54 ft channel

Traffic volume 2015, 54 ft channel


Configuration Traffic Flow Simulation Model


Major Components Shiprisk• Component Task• Main Initialises the model• Ship Describes the process of

the ship• Generator Generates the individual vessels

according to output from the traffic flow simulation model.

• VTS Controls the distances between the vessels

• Encounters A data component , provides the data of each potential encounter


head-head

crossing

crossing

radius 0,5 nautical mile

ENCOUNTER DEFINITION


Number accidents per 106 encounters (registered in the Straight of Dover)

Visibility Typeencounter

Accidents

head-head 6.2

crossing 4.9

Good

overtake 6.2

head-head 88

crossing 14

Foggyvisibility<1500m

overtake 90

head - head 290

crossing 630

Heavy Fogvisibility<500m

overtake 350


Model Shiprisk

WP1

WP2 WP 3

ship trackWP 4

Starting point

Figure 1 Lateral distribution ship position in the channel


1

3

42

5

System Puerto America

Section 1

Section5

Section 7

Section 3Section

2

Term 1 Term. 2Term.1 Term. 2

Term. 3

Situation Puerto America


No Traffic RulesNumber encounters 870

No encounters allowed in the mooring basinsNumber encounters 783

No encounters allowed in the turning basin and mooringsbasins

Number encounters 711

mooring basin oil andpetr.

turningbasin

mooringbasin coal

No encounters allowed in the turning basin, mooringsbasins and restricted encounters in the approach channel

Number encounters 313

mooring basin oil andpetr.

turningbasin

mooringbasin coal

Encounter densities, Puerto America


traffic rules in:

0

50

100

150

200

Oil_

1

Oil_

2

Oil_

3

Oil_

4

Oil_

5

Oil_

6

wai

tin

g t

imes

[m

in]

no rules

mooring areas

mooring, turning areas

mooring, turning areas andapproach

Waiting times versus traffic rules


Some conclusions and recommendations

The model 'SHIPRISK' provides a quick insight of the nautical risks

More prototype information should come available with respect to encounter frequencies

More data on vessel behaviour depending on infrastructural conditions, environmental conditions, and traffic loads should be collected for a statistical description of vessels tracks

port capacity versus port safety by r. groenveld

Documents

puerto americawaiting

dwell times

traffic volume

deberthing timesvessel

berths ship risk model

historical data

number of encounters

port capacity