Ballast Water Management Decision Support System Model Application - Global Maritime Transport and Ballast Water Management: Issues and Solutions - page 278

side the Mediterranean (i.e., Bandar Abbas, 10 Hong Kong, 11 Pusan 12 and Vancouver) 13
(PICES 2002 , 2006 ). A source port was considered as in HAB state at the time of
ballast water loading when a HAB occurrence was known to occur at the time of
ballasting or in case HABs occurred several times in the area of that port.

Risk Assessment Results

The relevant data and assumptions as described above were used to obtain RA
results for all ballast water source ports (see Table 5 ). An extreme risk was assessed
for many Mediterranean ports and also for ports located overseas.

Final Results

Vessels discharging ballast water in the Port of Koper which originates from source
ports in the northern Adriatic represent a very critical issue because BWE is not an
appropriate BWM method for this shallow water and enclosed area, and vessels do
not have BWMS installed onboard as the BWM Convention is not yet into force.
From the quantitative perspective, i.e., water volumes, these vessels represent the
majority of ballast water discharges in the Port of Koper, i.e., usually more than
80 % of all ballast water discharges, in 2005 even 85 % of all ballast water dis-
charges in the Port of Koper (Perkovi

et al. 2003 ). Also from the qualitative
perspective (i.e., HAO HAB), ballast water originating from these ports was found
to be critical (David et al. 2007b ). It is concluded that these critical situations
may only be managed with the installation of BWMS on vessels or by substituting
ships with barges. Therefore, this specifi c ballast water discharge profi le in the
Port of Koper has to be considered according to the RA results as shown above,
i.e., differences among the approaches studied should be considered in comparison
to the ballast water discharges from those source ports outside the northern Adriatic.
The RA results from source ports were related to each vessel arriving in Koper to
assign the level of risk to each vessel discharging ballast water. Vessels that could
manage ballast water before discharge under each studied approach were identifi ed
(see Table 6 ).

č

10 Found no data that would confi rm HABs.
11 i.e., Considered as HAB based on Yan et al. 2002, A national report on harmful algal blooms in
China. ( http://www.pices.int/publications/scientifi c_reports/Report23/HAB_China.pdf , last accessed
January 2014).
12 i.e., considered as HAB based on Lee et al. 2002. Harmful Algal Blooms (Red Tides):
Management and Mitigation in the Republic of Korea. ( http://www.pices.int/publications/scien-
tifi c_reports/Report23/HAB_Korea.pdf , last accessed January 2014).
13 i.e., considered as HAB based on Taylor and Harrison 2002. Harmful Algal Blooms in Western
Canadian Coastal Waters. ( http://www.pices.int/publications/scientifi c_reports/Report23/HAB_
Canada.pdf , last accessed January 2014).