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Tsunami analysis Support Service


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Service overview
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Tsunami analysis
The system predicts inundation area and its water depth caused by possible Tsunami by using the difference method of Shallow-water theory. It also evaluates wave power, calculates drift carrying capacity, the wave height and the velocity at mesh points and generates distribution map of tsunami wave height.

Planned to link with UC-win/Road



UC-win/Road for Tsunami UC-win/Road Ver.5

UC-win/Road xpswmm plug-in Ver.2 (for Tsunami) $3,000 (+tax)
  • Tsunami reproducing function by 3D Virtual Reality UC-win/Road
    You can set the position, range and height with a visual option as well as tsunami generation by linking with xpswmm.(Japanese)

    >> Public sector solution: Tsunami Analysis Service

    Simulation result by xpswmm Screen for setting Tsunami







Mechanism of tsunami generation

If an earthquake occurs, the uplift or subsidence is caused by ground movement under the sea bottom. With this movement, the overlying water vertically displaced, and the spread of water generates tsunami. When tsunami warning is announced, ships inside port go out of the port to avoid tsunami strike. That is because the energy of tsunami is smaller due to the deep water compared with shallow water area. The word tsunami derives from the larger damage on ships in the port (=tsu) compared with that of offshore. Currently, the word "tsunami", is also used in English. The velocity of tsunami is obtained by multiplying the gravity by water depth and rooting the value(v=gd). If the water depth is 4000m and the velocity of tsunami is approximately 720km/h(200m/S). It almost ties that of jet airplane.
image of tsunami occurrence



Recent tsunami devastated areas



Animated simulation of the 2004 Indian Ocean Tsunami disaster



Several functions of coastal forest in Japan (Hamada & Imamura,2003)




Tsunami analysis case
  • Overview
    Numerical calculation of tsunami at Imamura laboratory adapts the difference method of shallow water theory. As for tsunami simulation, the laboratory conducts run-up simulation which predicts inundation area and its water depth caused by possible Tsunami. Through the calculation, It evaluates wave power, calculates drift carrying capacity, the wave height and the velocity at mesh points and generates distribution map of tsunami wave height. Information on submarine topography includes documents published by Japan Coast Guard.

  • Input condition etc.
    The condition to be entered includes epicenter information (magnitude, dept and position) and submarine topography data (altitude and position).

  • Analysis sample case
    This is the case of Fukushima Earthquake, which occurred July 19th, 2008. Magnitude of the earthquake: M=6.6, depth of epicenter: about 10km.This case shows that the result of analysis is close to the estimation of meteorological agency, while the arrival time is 20 minutes later than that of meteorological agency.


distribution map of maximum tsunami wave height



Link with Tsunami analysis code of Imamura laboratory

FORUM8 will start analysis support service and make a link between the analysis code and UC-win/Road, by using the code developed by the laboratory. The analysis code can be adopted to the creation of hazard maps and the forecast of tsunami evacuation.FORUM8 is going to start a new service below.

Tsunami analysis code support service
The service reduces the load of data entry by transferring the basic data of topography, buildings, trees and etc from UC-win/Road.
After importing the calculation result of the analysis code, UC-win/Road visualizes the analysis.



Research activity at Imamura Laboratory of Tohoku University

Tsunami Engineering Laboratory (Professor Fumihiko Imamura) studies Tsunami and the followings are its research activities.Natural disaster is caused by the interaction between natural phenomena and human society. Damage phase is constantly changing depending on the evolving civilization. Developing countermeasures against tsunami disaster is one of the significant issues for coastal communities, which has been realized to be more important especially after the 2004 Indian ocean tsunami. The Tsunami Engineering Laboratory in DCRC, Tohoku University is the only one laboratory that studies tsunami disasters based on engineering approach. Based on the philosophy of prevention and control, their research focuses on field research work in Japan and abroad, development of prediction system based on numerical modeling technique and support for disaster prevention activities in local community. Especially, TIME (Tsunami Inundation Modeling Exchange) project is representative of our efforts, which transfers numerical modeling technique to more than 7 countries and communities at risk. The project is supporting the reconstruction and disaster prevention activities in the tsunami damaged countries.

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