Tsunamis of Sumatra Island

Résumé du document

Tsunami: appearance of a wave (wavefront).Propagation velocity: depth of the sea. The loss of energy is inversely proportional to the size. A tsunami travels quickly but also on long distances without losing consequent energy. With the approach of the coasts Tsunami slows down since its flow of energy remains constant, with the reduction of its speed, its size increases. On the coasts these waves reached a maximum height of 50 centimeters in the open ocean, only reaching their full devastating height when entering the shallow waters of the coast.

Extraits

[...] composed of several series of waves very big wavelength PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Concrete case with Sumatra's island - Result - Before After PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Concrete case with Sumatra's island - Result - The Indonesia's city of Banda Aceh was striked by a wave which flooded the shore on more than three kilometer PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Numerous: wounded people (blessés), missing people, schools, hospitals damages The final number of victims retained is approximately casualty The World Bank estimates the cost of the humanitarian aid at 5 billion dollars US have been used – 70% on banking placements) Concrete case with Sumatra's island - Result - town planning : urbanisme a gift : un don to remain : subsiter PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Considering solutions Agrandir Monitoring and alarm Centres  detection of tsunamis. [...]

[...] On the coasts These waves reached a maximum height of 50 centimetres in the open ocean, only reaching their full devastating height when entering the shallow waters of the coast. [...]

[...] A tsunami is created when a great water mass is moved Generally tsunamis are generated by great underwater earthquakes PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Explanation of tsunamis phenomenon - There characteristics - Distribution and shape of the tsunamis 1 ) After formation Tsunami  appearance of a wave (wavefront) Propagation velocity  depth of the sea The loss of energy is inversely proportional to the size A tsunami travels quickly but also on long distances without losing consequent energy With the approach of the coasts Tsunami slows down Since its flow of energy remains constant, with the reduction of its speed, its size increases. [...]

[...] Tsunamis of Sumatra island PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Introduction Significance of tsunami  « harbor wave » A tsunami is a wave Frequency: 10 / year Presentation: - the phenomenon - the tsunami of Sumatra Explanation of tsunamis phenomenon - Origin of tsunamis - subduction of underwater plates, landslides (mvt de terrain), underwater volcanic eruption, movement of very great mass which flowing in the sea (volcanic remains), nuclear explosion, falls of a meteorite etc. [...]

[...] Fig - Propagation du tsunami en profondeur variable : augmentation de l'amplitude, diminution de la longueur d'onde et de la vitesse en milieu peu profond PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Explanation of tsunamis phenomenon - Visual explanations - Visual explanations: Load video animation from TV programme to broadcast : diffuser to uprise : soulever to reach : atteindre PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Explanation of tsunamis phenomenon - Consequences - a retreat of the sea in the few minutes which precede it a tidal wave (raz de marée) strange behavior of some animals can cause enormous damage Consequences of tsunamis a beachcomber : une déferlante a jolt : une secousse to grab : happer PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Concrete case with Sumatra's island - Inventory before disaster - PLAN Introduction Explanation of tsunamis phenomenon - Origin of tsunamis - There characteristics - Visual explanations - Consequences Concrete case with Sumatra's island - Inventory before disaster - The catastrophe - Result Considering solutions Conclusion Concrete case with Sumatra's island - Inventory before disaster - Population: inhabitants, Surface: km (either 1/9e of France), Density: 290 inhabitants / km (107 in France). [...]