Environmental Engineering Reference
In-Depth Information
Table 9 Vessels sailing to the Port of Koper from source ports in the southern Adriatic (SA) and
Mediterranean Sea (MED) close to the Adriatic Sea, and expected delayed time in hours to
complete BWE before and in the BWEA
Potential
+ BWEA
SEQ
factor
Potential
+ BWEA
PT
factor
BW
for
disch.
Potential
+ BWEA
distance
Vessel
speed
BWEA
distance
SEQ
factor
PT
factor
Vessel
Source Port
Area
Delay
(m 3 )
(knots)
(NM)
(NM)
(h)
10 BAR
SA
15
701
150
0.90
0.60
190
1.13
0.76
1.17
11 BARI
SA
14
1,200
100
0.42
0.28
160
0.67
0.45
9.88
12 BARI
SA
15
470
100
0.64
0.43
160
1.02
0.68
3.79
14 MANFREDONIA
SA
14
489
100
0.79
0.53
/
/
/
1.85
15 BRINDISI
SA
15
828
200
0.97
0.65
/
/
/
0.43
27 MEDITERRANEAN
MED
15
5,010
290
0.68
0.45
/
/
/
9.10
31 PIOMBINO
MED
14
5,364
290
0.59
0.40
/
/
/
14.11
32 P IOMBINO
MED
14
5,261
290
0.61
0.40
/
/
/
13.44
Enhanced after David ( 2007 )
Table 10 Potential for BWM under the BWM Convention blanket approach in number of vessels
and quantities of ballast water discharged
Vessels
BW discharged (m 3 )
Nr. vessels BWM
54
BW BWM
57,387
Nr. vessels no BWM
9
BW no BWM
7,367
Nr. vessels from BWM relevant area
63
BW discharge from BWM relevant area
64,754
Total Nr. 2005
448
Total BW discharge 2005
544,133
% BWM / BWM relevant area
85.71
% BWM / BWM relevant area
88.62
% BWM / Total 2005
12.05
% BWM / Total 2005
10.55
Delay OK
4
RA high untreated
3.941
Undue delay
4
RA extreme untreated
3.426
Enhanced after David ( 2007 )
having the option to deviate (i.e., vessels 10, 11 and 12). Their average delay com-
pared to the intended routes would amount to 6.72 h (i.e., ranging from less than
half an hour up to 14.11 h). These delays are assessed as less critical since they are
related to longer voyages. Nevertheless, the four red-highlighted delays may be
considered as undue (see last column in Table 9 ).
As a result, under this approach 54 vessels were identifi ed as being able to
conduct BWE out of 63 vessels that had a ballast water source port in the BWM
relevant area i.e., outside the northern Adriatic. This represents 12.05 % of all
vessels that discharged ballast water in the Port of Koper in 2005, and 88.62 % of
those with a source port in the BWM relevant area. In total 57,387 m 3 of ballast
water discharged could have been managed out of 64,754 m 3 from the BWM
relevant area. This represents 10.55 % of all ballast water discharged in the Port of
Koper in 2005, and 88.62 % of the ballast water from source ports in the BWM
relevant area (see Table 10 ).
When combining the RA results with the blanket approach with available BWEA
it was recognized that 3,941 m 3 of high risk, and 3,426 m 3 of ballast water assessed
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