What happened to tsunami wavelength when waves arise near the coast?
A tsunami only becomes hazardous when it approaches land. As a tsunami enters shallow water near coastal shorelines, it slows to 20 to 30 mph. The wavelength decreases, the height increases, and currents intensify. Tsunami warnings come in different forms.
What damage can tsunamis cause?
More specifically, the damage caused directly by tsunamis can be summarized into the following: 1) Deaths and injuries; 2) houses destroyed, partially destroyed, inundated, flooded, or burned; 3) other property damage and loss; 4) boats washed away, damaged or destroyed; 5) lumber washed away; 6) marine installations …
Why do coral reefs get exposed during tsunami?
The damage to coastal ecosystems is highly variable, and the damage to coral reefs is mostly due to the sediment accumulation due to the turbulent churning of the sea. … The tsunami caused significant geomorphologic changes along the coastline, such as eroding sand beaches and enlarging water channels.
Why tsunamis become disastrous when they approach coastal regions?
As the tsunami waves become compressed near the coast, the wavelength is shortened and the wave energy is directed upward – thus increasing their heights considerably. Just as with ordinary surf, the energy of the tsunami waves must be contained in a smaller volume of water, so the waves grow in height.