UCL Engineering – Tsunami defence


Tsunami have caused over 300,000 lives to
be lost in the last ten years, and billions of dollars of economic damage. These very large waves are creatde when earthquakes
happen under the sea floor, and the fact that they converse their energy as they come towards the shoreline mean that they cause this large amount of devastation. My interest in tsunami started after having
gone to a mission to Sri Lanka and Thailand following the Boxing Day tsunami to look at
the damage to buildings. On returning to England, I found that there
were very few models that could predict this damage to structures and so I started asking
questions – why can’t we look at the near shore and onshore impacts of tsunami? For a tsunami, from the front it tends to
look like a wave, but if you look at it from the side you tend to think of it as
a chunk of water, moving inland to the beach. What we wanted to do is understand some of the fundamentals about
onshore flow

12 thoughts on “UCL Engineering – Tsunami defence

  1. You should build 3 walls with pumps inbetween them. The small wall will overflow. After this happening, pumps are activated with the seawater. It pumps the water 5 cm above the normal sea level back to the sea in many pipes about 10 cm average capacity. The second wall is higher than the first wall. If the speed of the water with a bigger tsunami tops the second wall even with the first battery pumps are working and overflows it, another battery of pumps is activated to pump the water back into the sea with a sewer type pipes average 1 meter. When the system is built in Japan it could be accompanied with a fourth wall with a 3rd generation battery even larger pumps. Then you are talking about large sewerpipes about 5 meter in diameter where the water is sent back to the sea to neutralize the large wave. I guess this system could prevent damage on coast line from tsunami waves approx 40 m high. You need to build 4 walls 1 Very Large wall, 1 smaller, 1 even smaller and for a small tsunami the smallest wall. This system should be tested in a small environment. Its wise to construct the walls with armoured concrete connecting the wals to eachother. This will make the tsunami defence system even stronger..

  2. …what about underground safe bunkers for civilians to run into, making them water proof. Or what if they built a massive boat facing the ocean close to the shores as high as the biggest tsunami ever recorded rather than civilians trying to out run the tsunami which they won't be able to.

  3. The energy of the tsunami in Japan had the equivalent to 36 times the nukes that destroyed Hiroshima and Nagasaki combined.
    You would need pretty high and strong walls for that

  4. It would be good to build kind of infrastructure that prevent from the devastating effects of the waves and just arise the water like a slow river flooding, it would reduce the damages costs considerably and the lives too.

  5. All you need to do is watch all the videos of the Japan Tsunami of 3/11/2011 to see that the force of a Tsunami cannot be tamed in a one size fits all solution. Alot of Coastal Residences are too close to build a wall sufficient enough to hold back destructive waters. A 10-20ft concrete wall is unattractive for a beach front property.

  6. people can avoid tsunami if they enter into ball like soccer ball zorbung please watch

    https://www.youtube.com/watch?v=-ljbOmNX7x0

    people would enter zorb ball and zorb ball outer part is covered in hard rubber so ball does nt brak when hit sharp object and when tsunami hits zorb ball full of air rises to surface people cn exit zorb ball when at surface

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