Morphological Characteristics of River Mouths After the 2011 Tohoku Tsunami in Miyagi Prefecture

When a tsunami reaches the coast and penetrates inland, its characteristics change significantly from water wave to strong inundation flow which causes damage on infrastructures, buildings and humans. Measuring flow velocities of tsunami inundation on land is quite rare but is important for understanding how tsunami penetrates inland and improving tsunami numerical models. In order to clarify the tsunami inundation flow characteristics on land with particular regard to velocity, we analyzed the aerial videos which captured the 2011 Tohoku tsunami attacking Sendai coast, Miyagi Prefecture. Consequently, the tsunami front and flow velocities reached approximately 8 m/s within 1 km inland from the shoreline, and they decreased as penetrating more inland. The results were used for verification of the numerical tsunami inundation model that is performed in Sendai city. We found that the present model results are consistent with the observed inundation characteristics when the bottom roughness distribution is sufficiently incorporated according to the land use conditions. This implies the capability of the present tsunami inundation model which is now used for the evaluation of post-disaster reconstruction plan of Sendai city.

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Trace Survey of the 2011 Tohoku Tsunami in the North of Miyagi Prefecture and Numerical Simulation of Bidirectional Tsunamis in Utatsusaki Peninsula

Coastal Engineering Journal ◽

10.1142/s0578563412500076 ◽

2012 ◽

Vol 54 (1) ◽

pp. 1250007-1-1250007-28 ◽

Cited By ~ 15

Author(s):

Taro Kakinuma ◽

Gozo Tsujimoto ◽

Tomohiro Yasuda ◽

Takashi Tamada

Keyword(s):

Numerical Simulation ◽

The North ◽

2011 Tohoku Tsunami ◽

Miyagi Prefecture ◽

Tohoku Tsunami

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SEDIMENT MOVEMENT AT THE KITAKAMI RIVER MOUTH AFTER THE 2011 TOHOKU TSUNAMI AND ITS MODELING

Journal of Japan Society of Civil Engineers Ser B2 (Coastal Engineering) ◽

10.2208/kaigan.76.2_i_625 ◽

2020 ◽

Vol 76 (2) ◽

pp. I_625-I_630

Author(s):

Nguyen Trong HIEP ◽

Hitoshi TANAKA ◽

Nguyen Xuan TINH

Keyword(s):

River Mouth ◽

Sediment Movement ◽

2011 Tohoku Tsunami ◽

Tohoku Tsunami

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The 2011 Tohoku Tsunami from the Sky: A Review on the Evolution of Artificial Intelligence Methods for Damage Assessment

Geosciences ◽

10.3390/geosciences11030133 ◽

2021 ◽

Vol 11 (3) ◽

pp. 133

Author(s):

Jérémie Sublime

Keyword(s):

Artificial Intelligence ◽

Case Studies ◽

Damage Assessment ◽

Structural Damage ◽

North East ◽

2011 Tohoku Tsunami ◽

Artificial Intelligence Methods ◽

The Future ◽

Tohoku Tsunami

The Tohoku tsunami was a devastating event that struck North-East Japan in 2011 and remained in the memory of people worldwide. The amount of devastation was so great that it took years to achieve a proper assessment of the economical and structural damage, with the consequences still being felt today. However, this tsunami was also one of the first observed from the sky by modern satellites and aircrafts, thus providing a unique opportunity to exploit these data and train artificial intelligence methods that could help to better handle the aftermath of similar disasters in the future. This paper provides a review of how artificial intelligence methods applied to case studies about the Tohoku tsunami have evolved since 2011. We focus on more than 15 studies that are compared and evaluated in terms of the data they require, the methods used, their degree of automation, their metric performances, and their strengths and weaknesses.

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