Oblique coastal approach of a tsunami wave train

1994 ◽  
Vol 32 (2) ◽  
pp. 251-258
Author(s):  
Bruce Hunt
Keyword(s):  
Tsunami Wave ◽  
Wave Train

scholarly journals Study on Analytical Modelling of Tsunami Wave Propagation

2020 ◽  
Author(s):  
Yasmin Regina M ◽  
Syed Mohamed E
Keyword(s):  
Wave Propagation ◽  
Arrival Time ◽  
Tsunami Wave ◽  
Wave Train ◽  
Deep Ocean ◽  
Vital Role ◽  
The People ◽  
Run Up ◽  
Short Time ◽  
Tsunami Amplitude

Modelling of tsunami wave propagation plays a vital role in forecasting of disastrous tsunami. The earlier identification and prediction of tsunami provides more time for taking preventive measures and evacuation. On December 26, 2004, massive destruction of lives and properties due to tsunami increases the needs to develop a fast and accurate modelling of tsunami wave propagation. The modelling of waves provide the amplitude of tsunami, speed, arrival time and power of the wall of water and also run up distance and height. It also used to predict vulnerable buildings to tsunami. In this paper describes the modelling of tsunami wave propagation from generation to run-up. Numerical and analytical methods used for modelling and simulation. Tsunami is serious of wave (wave train) which has a long wavelength >500 km and celerity of wave more than 800 km/hr in deep ocean and in shallow coast, their wavelength and celerity diminishes but the amplitude of wave increases above 30m. The scope of this study is to determine the areas which are going to hit by tsunami, amplitude of wave and their arrival time for early forecasting and alert the people within a short time after an earthquake happened.

scholarly journals Numerical Investigation on Generation and Propagation Characteristics of Offshore Tsunami Wave under Landslide

2020 ◽  
Vol 10 (16) ◽  
pp. 5579
Author(s):  
Junkai Sun ◽  
Yang Wang ◽  
Cheng Huang ◽  
Wanhu Wang ◽  
Hongbing Wang ◽  
...  
Keyword(s):  
Tsunami Wave ◽  
Wave Train ◽  
Coupled Model ◽  
Immersed Boundary ◽  
Propagation Mode ◽  
Short Axis ◽  
Wave Component ◽  
Sliding Angle ◽  
Large Wave ◽  
Subaerial Landslide

Tsunamis induced by the landslide will divide into a traveling wave component propagating along the coastline and an offshore wave component propagating perpendicular to the coastline. The offshore tsunami wave has the non-negligible energy and destruction in enclosed basins as fjords, reservoirs, and lakes, which are worth studying. The initial submergence condition, the falling height and sliding angle of slider, are important reference indexes of damage degree of landslide and may also matter at that of the landslide-induced tsunami. Depending on the fully coupled model, the effects of them on the production and propagation of the tsunami were considered in the study. Since the slider used was semi-elliptic, the effect of the ratio of the long axis to the short axis was also analyzed. According to the computational fluid dynamics theory, a numerical wave tank was developed by the immersed boundary (IB) method; besides, the general moving-object module of slide mass was also embedded to the numerical tanker. The results indicate that the effects of the squeezing and pushing of the slider on water produce a naturally attenuated wave at the front of the wave train, and the attenuation becomes more serious with the increase in the initial submersion range of the slider. The effects of the vertical movement of the slider cause the increase in the amplitude of the back of the wave train. As the falling height increases, the large wave height increases when the slider is initially submerged and decreases when it is not initially submerged, except for the accidental elevation of that at smaller falling heights. The results also indicate that the hazard of the subaerial landslide-induced tsunami is greater under a small or large falling angle, and that of the partial subaerial and submarine landslide-induced tsunami is greater under a small falling angle. With the increase in the ratio of the long axis to the short axis, the total induced wave energy decreases and the shape of the wave train proportionally reduces, while the wave propagation mode does not change.

The tsunami of May 23, 1960, on the Island of Hawaii

1961 ◽  
Vol 51 (2) ◽  
pp. 135-157
Author(s):  
J. P. Eaton ◽  
D. H. Richter ◽  
W. U. Ault
Keyword(s):  
Tsunami Wave ◽  
Wave Train ◽  
Geographic Origin ◽  
Third Wave ◽  
Hydraulic Shock ◽  
The Third ◽  
Bay Area ◽  
Wave Heights ◽  
The City ◽  
Height Data

Abstract The tsunami of May 23, 1960, originating in an area of profound crustal disturbance along the coast of Chile, resulted in the greatest natural disaster in Hawaii since the Aleutian-born tsunami of 1946. A study of T phases from earthquakes produced by this disturbance suggests that the duration of faulting responsible for the largest earthquake and the tsunami was about 7 minutes. With the exception of the Hilo Bay area, wave heights on the Island of Hawaii were generally low, ranging between 3 and 17 feet, and averaging 9 feet. At Hilo, the third wave, which developed into a bore as it entered the bay, rose 35 feet above sea level. The action of this bore is best explained in terms of an hydraulic shock wave; its relation to the tsunami wave train, however, is poorly understood. Patterns of wave heights on Hawaii's shores produced by recent tsunamis of diverse geographic origin are strikingly different, whereas those from nearly the same origin are remarkably similar. The city of Hilo, which experienced a loss of 61 lives and $20 million in property, sustained the most extensive damage that occurred in the Hawaiian Islands. The need for tsunami research and continual public education, as a means for preventing further disaster, is painfully evident. The wave height data presented, together with the fullest possible evaluation of the seismogram, should aid in indicating danger areas and forecasting wave heights in future tsunamis.

Coastal amplification of a tsunami wave train

1993 ◽  
Vol 31 (3) ◽  
pp. 415-423
Author(s):  
Bruce Hunt
Keyword(s):  
Tsunami Wave ◽  
Wave Train

STUDY ON TSUNAMI WAVE PRESSURE OF REGULARLY-ARRANGED CYLINDRES

2018 ◽  
Vol 74 (2) ◽  
pp. I_259-I_264
Author(s):  
Akio NAGAYAMA ◽  
Tomotaka TANAKA ◽  
Ryouga SAKAGUCHI ◽  
Ryoudai SUEYOSHI ◽  
Toshiyuki ASANO
Keyword(s):  
Tsunami Wave ◽  
Wave Pressure

Tsunami wave run-up load reduction inside a building array

2021 ◽  
pp. 103910
Author(s):  
Joaquin P. Moris ◽  
Andrew B. Kennedy ◽  
Joannes J. Westerink
Keyword(s):  
Tsunami Wave ◽  
Load Reduction ◽  
Building Array ◽  
Run Up

Self-Acceleration in the Parameterization of Orographic Gravity Wave Drag

2010 ◽  
Vol 67 (8) ◽  
pp. 2537-2546 ◽  
Author(s):  
John F. Scinocca ◽  
Bruce R. Sutherland
Keyword(s):  
Gravity Wave ◽  
Middle Atmosphere ◽  
Wave Train ◽  
Leading Edge ◽  
Wave Theory ◽  
Wave Drag ◽  
Tuning Parameter ◽  
Mean Flow ◽  
Propagating Waves ◽  
The Impact

Abstract A new effect related to the evaluation of momentum deposition in conventional parameterizations of orographic gravity wave drag (GWD) is considered. The effect takes the form of an adjustment to the basic-state wind about which steady-state wave solutions are constructed. The adjustment is conservative and follows from wave–mean flow theory associated with wave transience at the leading edge of the wave train, which sets up the steady solution assumed in such parameterizations. This has been referred to as “self-acceleration” and it is shown to induce a systematic lowering of the elevation of momentum deposition, which depends quadratically on the amplitude of the wave. An expression for the leading-order impact of self-acceleration is derived in terms of a reduction of the critical inverse Froude number Fc, which determines the onset of wave breaking for upwardly propagating waves in orographic GWD schemes. In such schemes Fc is a central tuning parameter and typical values are generally smaller than anticipated from conventional wave theory. Here it is suggested that self-acceleration may provide some of the explanation for why such small values of Fc are required. The impact of Fc on present-day climate is illustrated by simulations of the Canadian Middle Atmosphere Model.

Sign in / Sign up

Export Citation Format

Share Document