Environmental Engineering Reference
In-Depth Information
Ballast Water Management Decision
Support System
Matej David and Stephan Gollasch
Abstract
A Decision Support System (DSS) is a supporting tool enhancing a
decision-making process. Decision-makers are frequently faced with the problem to
take decisions on very complex issues, which requires large data inputs, and a
timely decision process. DSSs provide decision makers with a tool to reduce uncer-
tainties, and to simplify and speed-up the decision process as well as to avoid sub-
jectivism induced by the decision-maker and to guarantee transparency of a decision
process. The DSS approach has been introduced in the ballast water management
(BWM) fi eld and the need primarily arose with the introduction of the selective
BWM approach. More precisely, it was recognised that a supporting tool is needed
to aid transparency and consistency when deciding on BWM requirements to
achieve better environmental protection and lessen burden on vessels. The DSS
process starts with communication and data input, continues with risk assessment,
BWM decisions, vessel's action(s), and ends with monitoring and review processes.
Throughout the entire decision process information needs to be exchanged with
outer (e.g., vessel, other ports) and inner sources (e.g., vessel's particulars, compli-
ance history), and therefore needs to be supported by adequate communication pro-
cesses and data management. When required BWM measures were not conducted
properly the BWM DSS endpoints range from situations where unmanaged ballast
water can be discharged to cases where vessels may be turned away. The chapter
provides a detailed step-by-step DSS model which may be used by administrations
and other authorities involved in the decision making processes.
Keywords
Decision support system • Ballast water management • Port State con-
trol • Port State authority • Risk assessment • Ballast water management convention
• Harmful aquatic organisms and pathogens
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