Pumping-Through方式によるバラスト水交換の水理模型実験

概要

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In this paper authors present results of experiments and numerical calculation of the ballast water exchange with a 2-Dimension tank model using pumping-through method. In recent years discharged ballast water from the ships has been identified as a potential threat to the marine environment. Many kinds of species are included in discharged ballast water and these are transferred from one port to others. Breed species have some potential that cause severe adverse impact on ecology including expulsion of native organisms. It probably affects the human society as well. In view of this problem the IMO adopted "Regulations for the Control and Management of Ship's Ballast Water and Sediments" in 2004. It is mandatory that all the ships should comply with "Ballast Water Performance Standard" by 2016. It is required that ballast water should be exchanged using Pumping-Through method until 2016. By using this method, it is assumed that 95% of the ballast water exchange is possible if seawater of 3 times of ballast tank capacity is overflowed. However there are only few studies on the verification of the volume of ballast water discharge using this method. Thus it is necessary to check the efficiency of this procedure. The experiments results show that pumping-through method can dilute about 95% of ballast water if volume of 3 times the capacity of the tank model is overflowed.
社団法人日本航海学会の論文
2004-09-25