Thesis jointly supervised by Ecole des Mines d'Alès. PhD jointly supervised by: Gilles DUSSERRE, Research Director at Ecole des Mines d’Alès
Committee: Jacques BOURGOIS, Yann LEREDDE, Frédéric MUTTIN, Claude CASELLAS, Lounès TADRIST, Laurent APRIN, Frédéric HEYMES, Stéphane Le FLOCH
Abstract: Maritime transport quickly increases during the last decade. It is the cheapest way to transport large quantities of goods over long distances. The growth of this trade necessarily leads to an increase in the traffic density and therefore the risk of accident and sinking increases as well. The large amount of chemicals involved in an accident may threaten the environment and human health in case of shipwreck with underwater chemical release. Unfortunately the physicochemical mechanisms occurring during the transfer of a chemical to the sea surface are still poorly understood. Those mechanisms depend on various parameters such as the physicochemical properties of the chemicals and the specific properties of the accident surroundings.
This research was conducted in collaboration with the Ecole des Mines d'Alès and Cedre in a global approach to understand the behaviour of liquid, floating and soluble chemicals released after a shipwreck. This experimental study has been carried out according to 3 main points:
- The phenomenology of a release at the breach. The objectives are to quantify the flow rate and the release pattern,
- The hydrodynamic behaviour of the released chemicals and their fate in the water column,
- The mass transfer of the chemical during its solubilization in the water column.
For each point, the results are compared to those predicted by correlations in the literature in order to propose a global model of consequences that is adapted to the marine pollution management.
Bibliographical reference: www.cedre.fr/pmb/opac_css/index.php?lvl=notice_display&id=9139