Oil Spill Boom Modelling By The
Finite-element Method
Author(s)
F. Muttin
Abstract
During an oil-spill crisis, emergency action plans define priority locations on
coastal zones to be protected by floating booms. Estuaries, fisheries, oyster
production, and water supply are some of the most concerned examples. An oilspill
boom is a long floating structure, the boom length can be as long as 1 km. A
boom is used to deviate or to stop a floating pollution. The strategy to be adopted
(deviative or stopping) depends on the current velocity. The sea current velocity
and direction are variable in a coastal zone and it can depend on fluvial or tide
flow. The variability of the environmental conditions increases the complexity of
the mechanical problem. Another difficulty of a boom contingency plan comes
from the definition of the adapted boundary conditions. Sea depth and coastal
morphology must be compatible with the boom mooring devices: anchor, pile,
and fixed point. This paper presents two numerical models named FORBAR and
SIMBAR. FORBAR uses a 1D cable equation which permits to handle the boom
curve on the sea surface. SIMBAR uses a 3D membrane finite-element which
permits to characterize the submarine boom skirt angle. These numerical models
are able to give as much mechanical information as required to optimize the
system. A comparison between the two numerical models, 1D model (FORBAR)
and 3D model (SIMBAR), is shown in the case of the Elorn river (Brittany,
France) contingency plan.
Keywords: spilled oil, containment, floating boom, coastal waters.
1 Introduction
A floating boom is a flexible structure moored on a coastal zone [1]. A boom is
composed of a floating device (inflatable tube) and an immerged flexible skirt.
Keywords
spilled oil, containment, floating boom, coastal waters.
Related Book
Other papers in this volume
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