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| RISQ2009-1 | Natural hazards in coastal zones: coastal erosion, harbour protection, natural and induced subsidence, seawater intrusions, impact of climatic changes, tsunami
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| Duration : | 18h Th, 18h Pr |
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| Credits/ECTS : |
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| Holder(s) : | Jean‑Marie Beckers, Alain Dassargues, André Ozer |
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| Language : | Langue française |
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| Course contents : | JMB
Properties of sea water and sea ice. Formation of ice. Stabilitty of a water column. Introduction to the dynamics of ocean currents. Salt water intrusion in rivers. Wind driven and tidal currents. Wave theory.
AD
Natural and induced subsidence:
understanding the processes, study of the main influencing parameters, examples.
Seawater intrusion in groundwater: understanding the processes, study of the main influencing parameters, examples.
AO
Littoral morphology: coastal processes. Mechanisms of the marine erosion on rocky coasts. Action of the sea on crumbly coasts. Sea currents. Theory of Zenkovitch. Coastal marshes and estuaries.
Sub-marine morphology: means of prospection. Morphology of the continental shelf and slope. Underwater canyons.
Variations of the shorelines : Quaternary variations. Causes and consequences of the current rise in the sea level. Principle of Bruun. Sedimentary balance of the beaches.
Classification of the coasts.
Regional examples: Belgian, corsican and sardinian coast but also Vietnam and Morocco. |
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| Course objective : | JMB
My contribution to these lectures is to give students basic physical oceanography with a particular attention to natural risks (sea level changes, intrusion of salt water, storm surges, tsunamis, El Nino,...).
AO
The coastal environment at the air-ground-sea contact is one of most fragile. It undergoes currently, directly or indirectly, a continually increasing anthropic pressure. It results from it that 90% of the worldwide littorals are today in erosion. For a adapted coastal planning, it is important to control the causes of this degradation in order to reduce their consequences. |
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| Prerequisites : | Mathematics, physics and chemistry at a level of bachelor of sciences (Scince ans Applied Sciences Faculty)
Good knowledge in Geology, Climatology and Geomorphology. |
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| Workshops : | Exercices are direct applications of theorical concepts given during the lectures.
Practical works on the field. One day will be devoted to the study of the estuary of the River Scheld (Netherlands) and another at the Opal Coast (France). |
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| Organization : | 18h of theorical courses organized in 6 sessions of 3h.
2 days of field trip in France and the Netherlands.
For the air-sea interactions : written open book exam. |
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| Assessment : | For subsidence and seawater intrusion in groundwater: evaluated study case report.
Coastal geomorphology: theoric evaluation (written exam.) and for the practical part, written exam. with open book. |
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| Contacts : | For subsidence and seawater intrusion in groundwater:
Prof. A.Dassargues
alain.dassargues@ulg.ac.be
For coastal geomorphology :
Prof. A. Ozer
aozer@ulg.ac.be Tel. 04/366 5446
For interactions air-sea:
Prof. JM.Beckers
JM.Beckers@ulg.ac.be |
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