|
Waves of Tsunamis |
A wave becomes a
shallow-water wave when the ratio between the water depth and its wavelength
gets very small. Shallow water waves move at a speed that is equal to the square
root of the product of the acceleration of gravity (9.8 m/s/s) and the water
depth
A wave becomes a
shallow-water wave when the ratio between the water depth and its wavelength
gets very small. Shallow water waves move at a speed that is equal to the square
root of the product of the acceleration of gravity (9.8 m/s/s) and the water
depth
Normal Line (Nodal Line):
Line that travels through the center of a wave series
Trough: Lowest point in a
wave
Crest: Highest point in a
wave
Wave Length(l)
: Distance between 2 consecutive crests
Period (T): Time it takes to
travel one wavelength
Amplitude: Is the vertical
distance from trough to Normal Line or normal line to crest
Frequency: Number of waves
that pass a given point at a given period of time
Wave Velocity (v=fl):
Speed of a wave
The energy in a wave is one
factor that helps determine the damage a tsunami causes. When the wave hits
shallow water other factors that influence the destructive effect of a tsunami
come into play. The velocity of the wave and its period. A wave velocity
(meters/second) is calculated by multiplying the distance between two crests of
the wave by frequency.
A tsunami grows in heights as
it approaches land. As the depth of the water decreases so do the wave length
and wave velocity. But the wave energy remains nearly constant.
As a general rule long-period
tsunami waves generate a large sources, such as earthquakes or falling meteors.
Short-period tsunami waves generate from smaller sources such as landslides and
smaller earthquakes.
*All other wave properties
vary with water depth
The energy in a wave is one
factor that helps determine the damage a tsunami causes. When the wave hits
shallow water other factors that influence the destructive effect of a tsunami
come into play. The velocity of the wave and its period. A wave velocity
(meters/second) is calculated by multiplying the distance between two crests of
the wave by frequency.
A tsunami grows in heights as it approaches land. As the depth of the water decreases so do the wave length and wave velocity. But the wave energy remains nearly constant.
As a general rule long-period
tsunami waves generate a large sources, such as earthquakes or falling meteors.
Short-period tsunami waves generate from smaller sources such as landslides and
smaller earthquakes.
*All other wave properties vary with water depth