海洋の油汚染の防止対策と保全効果について

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There are a great variety of materials from different sources that pollute the marine environment of which, oil pollution is a major contributor. Oil pollution occurs mainly during the loading/unloading of tankers at berth and due to tanker collisions and accidents at sea, which account for about 60 percent of all marine oil pollution causes. In the aftermath of such an event, natural delays and the wrong choice of systems to prevent from oil spread, cause a large scale diffusion of oil, damage to the ecological systems and trouble to the socio-economic balance of local residents. A Methodology for making an adaptable choice from the many prevention systems against the spread of spilt oil, with consideration of the oil quality, and its evaluation are not fully established. This is partly because of the fact that the calculation of negative influences of the spilt oil, and a methodology of evaluation of prevention systems are not very easy. The oil fence is generally used as a prevention system, but it has the inherent problem of spillages from under the fence during some critical tidal conditions. First of all, this paper presents a numerical simulation of oil spillages diffusion of oil from an oil fence, to keep a check on the performance of oil fences. Next, through the evaluation of the existing safeguard systems using a multicriteria analysis method, the difference between different systems in a particular situation is recognized as due to the difference of weights attached to the evaluation items.
1996-09-04

海洋の油汚染の防止対策と保全効果について

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