Ballast Water Management Decision Support System Model Application - Global Maritime Transport and Ballast Water Management: Issues and Solutions - page 263

Fig. 5 Identifi ed ballast water source ports and intended vessel routes to the Port of Koper where
BWE could be conducted. The area less than 50 NM from nearest land and less than 200 m water
depth is shown in pink (Enhanced after David 2007 )
pump rate capacity (PRC) (see section “ Time and Distance Needed to Complete
Ballast Water Exchange ”). Only 12 vessels were identifi ed as able to conduct BWE
out of the 48 vessels with ballast water source ports in zones 3 and 4. These represent
2.68 % of all vessels that discharged ballast water in the Port of Koper in 2005.
Considering the quantity of ballast water discharged, only 10,866 m 3 of ballast water
could have been managed out of the 49,385 m 3 originating from zones 3 and 4.
This represents only 2 % of the total amount of ballast water discharged, and 22.00 %
of the ballast water from source ports in zones 3 and 4 (see Table 1 ).
In consequence, the application of a blanket approach for the Port of Koper would
result in more than 97 % of all vessels in the “do nothing” option of 'compliance' with
the BWM Convention, i.e., 98 % of the discharged ballast water would be unmanaged.
Other BWM Options
A comprehensive review of BWMS is presented in chapter “ Ballast Water
Management Systems for Vessels ”. More than 100 such systems were identifi ed
which make use of different treatment technologies mostly in combination. BWMS