Shallow water gravity waves

The waves shown are shallow water waves for which l>20d. Shallow water waves have longitudinal motion on the bottom and the velocity is depth dependent. When l>20d the equation for gravity wave speed (for wavelengths greater than a few cm that are not influenced by surface tension) simplifies to....

Tsunami are shallow water waves even in the deep ocean. Dispersion in a ripple tank is depth dependent (for shallow water waves).