scholarly journals THE 2010 CHILEAN AND THE 2011 TOHOKU TSUNAMI WAVES IMPACT TO RIVERS IN THE TOHOKU REGION, JAPAN

2012 ◽  
Vol 1 (33) ◽  
pp. 7 ◽  
Author(s):  
Hitoshi Tanaka ◽  
Nguyen Xuan Tinh
Keyword(s):  
Travel Time ◽  
Environmental Problem ◽  
Tsunami Wave ◽  
Wave Theory ◽  
Large River ◽  
Tsunami Waves ◽  
2011 Tohoku Tsunami ◽  
Tsunami Travel Time ◽  
Tohoku Tsunami ◽  
Chilean Tsunami

As a result when tsunami invades into river, it may not only a threat of damages to the banks but also cause the environmental problem such as inundation. Therefore, study of tsunami impacts to rivers becomes more important. The main objectives of this study are to investigate the tsunami wave propagation at different river morphologies based on real time measurements during the 2010 Chilean Tsunami and 2011 Tohoku Tsunami events. The aim is to learn empirically from the last extreme events tsunamis in order to suggest a better solution in terms of river and coastal management in the future. The analyzed results have been shown that the tsunami wave can be affected up to several tens kilometer upstream of a large river and the measured tsunami travel time inside the river is almost similar to the tsunami travel time calculated by using the long wave theory.

Parallel Implementation of Dispersive Tsunami Wave Modeling with a Nesting Algorithm for the 2011 Tohoku Tsunami

2015 ◽  
Vol 172 (12) ◽  
pp. 3455-3472 ◽  
Author(s):  
Toshitaka Baba ◽  
Narumi Takahashi ◽  
Yoshiyuki Kaneda ◽  
Kazuto Ando ◽  
Daisuke Matsuoka ◽  
...  
Keyword(s):  
Tsunami Wave ◽  
Parallel Implementation ◽  
Wave Modeling ◽  
2011 Tohoku Tsunami ◽  
Tohoku Tsunami ◽  
Nesting Algorithm

scholarly journals Estimation of Wave Force Acting on Bridge Superstructures due to the 2011 Tohoku Tsunami

2013 ◽  
Vol 8 (4) ◽  
pp. 605-611 ◽  
Author(s):  
Shojiro Kataoka ◽  
◽  
Masahiro Kaneko
Keyword(s):  
Highway Bridges ◽  
Wave Theory ◽  
Wave Force ◽  
Wave Forces ◽  
Numerical Wave Flume ◽  
Wave Flume ◽  
2011 Tohoku Tsunami ◽  
Time Histories ◽  
Numerical Wave ◽  
Tohoku Tsunami

Wave forces acting on the superstructures of two highway bridges affected by the 2011 Tohoku tsunami, the Shin-Aikawa Bridge and the Yanoura Bridge, are estimated combining 2-D FDM and a numerical wave flume (CADMAS-SURF) analysis. The superstructure of the Shin-Aikawa Bridge was washed out and swept 500 m away by the backwash. The Yanoura Bridge suffered no damage even though it was completely submerged in the tsunami. Time histories of the tsunami wave height and flow velocity are calculated using 2-D FDM, based on the nonlinear long wave theory. Lateral and uplift forces acting on the superstructures due to the simulated tsunami are then analyzed by the numerical wave flume. Comparisons between the analytical wave forces and corresponding loading capacities account for the differences in damage to the two bridges.

Tsunami Ray Tracing Method for Shortest Travel-Time Path

2021 ◽  
Author(s):  
Tung-Cheng Ho ◽  
Shingo Watada ◽  
Kenji Satake
Keyword(s):  
Travel Time ◽  
Ray Tracing ◽  
Tsunami Wave ◽  
Wave Theory ◽  
Ray Tracing Method ◽  
Tsunami Early Warning ◽  
Time Path ◽  
Long Wave ◽  
Ray Path ◽  
Tracing Method

<p>We propose a ray-tracing method to solve the two-point boundary value problem for tsunamis based on the long-wave theory. In the long-wave theory, the tsunami wave velocity is proportional to the square root of water depth, which is available from global bathymetric atlases. Our method computes the shortest travel times starting from each of the two given points and calculates the local ray direction to trace the ray path. We utilize an explicit, non-iterative tracing scheme that exhibits robust results and applies to any tsunami-accessible locations, and the global-shortest travel-time path is derived. In simple and real bathymetry cases, our method demonstrates stable results with neglectable low uncertainties. The ray-tracing method is then applied to analyze the path of tsunamis from different directions to four important bays in Japan. The result shows that tsunami ray paths are significantly influenced by local bathymetry, and some crucial structures, such as trench and trough, behave as the primary routes of this region. Deploying stations near these routes will be most beneficial for tsunami early warning. The existing tsunami-observing system off the Honshu area works well for tsunamis from the east side but slightly deficient for tsunamis from the west side. The far-field ray tracing shows that tsunamis traveling from Chile to Japan through two main routes—one via north Hawaii and the other via the south— depending on the location of the source.</p>

scholarly journals A Field Survey of Geomorphic Change on Kesennuma Bay cased by the 2010 Chilean Tsunami and the 2011 Tohoku Tsunami

2012 ◽  
Vol 68 (2) ◽  
pp. I_231-I_235 ◽  
Author(s):  
Tsuyoshi HARAGUCHI ◽  
Tomoyuki TAKAHASHI ◽  
Rikito HISAMATSU ◽  
Yu MORISHITA ◽  
Itaru SASAKI
Keyword(s):  
Field Survey ◽  
2011 Tohoku Tsunami ◽  
Tohoku Tsunami ◽  
Chilean Tsunami

scholarly journals LARGE-SCALE EXPERIMENTS ON WAVE-INDUCED SHALLOW TURBULENT COHERENT STRUCTURES

2018 ◽  
pp. 54
Author(s):  
Nikos Kalligeris ◽  
Patrick J. Lynett
Keyword(s):  
Coherent Structures ◽  
High Speed ◽  
Large Scale ◽  
Incoming Wave ◽  
Tsunami Waves ◽  
2011 Tohoku Tsunami ◽  
Turbulent Coherent Structures ◽  
Near Shore ◽  
Tohoku Tsunami ◽  
Wave Induced

There are numerous reports of large-scale "whirlpools" being generated in the near-shore during tsunami events (Borrero et al., 2015). These features, termed tsunamiincluded turbulent coherent structures (TCS), form due to flow separation at sharp coastline features. During the 2011 Tohoku tsunami, the generation of a large-scale TCS was captured at port Oarai in a helicopter footage (Lynett et al., 2012). The TCS was spinning for tens of minutes, entraining boats in the high-speed rotational flow, until it was washed away by the next incoming wave. TCS generation can potentially control the hazard for small amplitude tsunami waves in ports and harbors (Borrero et al., 2015; Kalligeris et al., 2016).

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

Geosciences ◽  
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.

scholarly journals Amplification Mechanisms of The 2011 Tohoku Tsunami in Ryori Bay

2013 ◽  
Vol 69 (2) ◽  
pp. I_171-I_175
Author(s):  
Yusuke YAMANAKA ◽  
Shinji SATO ◽  
Yoshimitsu TAJIMA
Keyword(s):  
2011 Tohoku Tsunami ◽  
Tohoku Tsunami
Sign in / Sign up

Export Citation Format

Share Document