Title
Adjustable calculation form to quantify the amount of
ballast water transported in ballast tanks and
discharged annually
by Stephan Gollasch
This form is based on results of the first European ship sampling study on ballast water and tank sediments
undertaken on nearly 200 vessels in German ports from 1992 to 1996 and may NOT meet your needs or
represent the typical situation in your country. It could be used as a very first indication.
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Title
fy the amount of
st tanks and
ballast water and tank sediments
nd may NOT meet your needs or
s a very first indication.
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Title
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You need to fill in the blue cells according to your situation. All other cells are write protected.
Trade characteristics Export / import of goods
How is the export/import trade balance
in your country?
Import Export
Export 50.0 % 50% 50%
Import 50.0 %
Total 100.0 %
Shipping characteristics Domestic / international shipping
Are domestic or international ship
arrivals prevailing?
Domest. 50.0 % Internat. Domest.
Internat. 50.0 % 50% 50%
Total 100.0 %
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You need to fill in the blue cells. Data in the yellow marked cells may be changed according to your needs. All other cells are wr
Type Annual DWT of Maximum Maximum
of ship arrivals ships ballast tank ballast tank
vessel in all ports investi- capacity capacity
gated per ship in % of DWT
ships in % (average) (average) (average)
Containership 0 #DIV/0! 29,900 8,312 27.8
Ro Ro carrier 0 #DIV/0! 19,450 1,964 10.1
Combiship 0 #DIV/0! 11,950 2,880 24.1
Bulker 0 #DIV/0! 44,000 1,672 3.8
Fruitship 0 #DIV/0! 10,700 1,573 14.7
Tanker 0 #DIV/0! 125,000 41,250 33.0
Passengership 0 #DIV/0! 46,000 2,714 5.9
Specialship 0 #DIV/0! 1,350 131 9.7
Total 0 #DIV/0!
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our needs. All other cells are write protected.
Annual max. Volume of Annual Discharged Discharged
ballast tank ballast water ballast ballast ballast
capacity onboard water water water
on board in ports in warterways
in DWT in % of DWT in DWT in % [DWT] [t] * in %
0 15.0 0 20 0 0 10
0 15.0 0 20 0 0 10
0 15.0 0 30 0 0 10
0 0.5 0 10 0 0 10
0 5.0 0 15 0 0 5
0 16.5 0 60 0 0 5
0 5.0 0 5 0 0 5
0 5.0 0 5 0 0 5
0 0
* (1 DWT = 2,8 t)
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Discharged Total Discharged
ballast volume of ballast water
water ballast water of
in warterways discharged foreign origin
[t] [t] % of all in t.
0 0 50 0
0 0 50 0
0 0 50 0
0 0 50 0
0 0 50 0
0 0 50 0
0 0 50 0
0 0 50 0
0 0 0
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Summary
Total number of ship arrivals:
Annually amount of ballast water discharged in ports in t.:
Annually amount of ballast water discharged in waterways in t.:
Annually amount of discharged ballast water in t. (total):
Annually amount of discharged ballast water in t. (foreign origin):
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0
0
0
0
0
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Type of vessels arriving
Passengershi
Ro Tanker
Specialship
Combiship
Fruitship
Ropcarrier
Bulker
Containership
Amount of ballast water
discharged according to
type of vessel
Containership Ro Ro carrier Combiship Bulker
Fruitship Tanker Passengership Specialship
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During the German shipping study in average one specimen
of zooplankton was found in one litre of ballast water. The
application of this fact to the calculation of this form results in:
total number of zooplankton specimens dirscharged
with ballast water of foreign origin:
annually: 0 specimens
per day: 0 specimens
per hour: 0 specimens
per second: 0 specimens
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Other shipping studies revealed up to 17 specimens
of zooplankton in one litre of ballast water. This results in
a total number of zooplankton specimens dirscharged
with ballast water of foreign origin:
annually: 0 specimens
per day: 0 specimens
per hour: 0 specimens
per second: 0 specimens
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If your shipping study revealed another mean number of
specimens per litre of ballast water, please add your value
in the neighbouring cell => 0
annually: 0 specimens
per day: 0 specimens
per hour: 0 specimens
per second: 0 specimens
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Please note, that the amount of ballast water discharged is ONLY an
indication for the risk of future species introductions.
The risk of future introductions is NOT quoted according to the quantity of
ballast water released, BUT to the quality of the ballast water discharged.
Studies have shown, that each single vessel has the potential to introduce a
non-native species.
Other important factors for the risk assessment (e.g. duration of the voyage,
season when ballast water discharge takes place, matching climate and
salinity in area of origin and discharge) were NOT considered in this form.
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rged is ONLY an
ding to the quantity of
ast water discharged.
potential to introduce a
duration of the voyage,
atching climate and
onsidered in this form.
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