Bulkheads are occasionally used to prevent damaged caused by waves. However, the primary use of bulkheads is to prevent erosion.
That would depend on where the tsunami struck and how big it was. Much of Australia's coastline is very sparsely populated, but a tsunami hitting one of the coastal towns or cities would wreak havoc.
A tsunami caused most damage in 2004
The tsunami did much more damage, it also will leave a finachal hole to.
They are about the same, but if I had to say: Tsunami.
tsunami
what precautionary measures are taken to minimize the damage caused by the tsunami
That really depends on how much damage it caused. But a tsunami as devastating as the one that just hit japan, would cost hundreds of billions.add I understand that some coastal land in Hawaii has been cleared from development because of too-frequent tsunami impact. Very sensible.
it was bigger and caused more damage
There was one tsunami that was approximately 84 metres high and did a lot of damage-I'm not being very specific am I?
well te earthquake caused the tsunami to hit so the earthquake did the most damage
Assuming you're talking about the March 2011 Japanese earthquake, the main factor that caused the majority of damage was the 30-foot tsunami wave that rushed the coastline of the Miyagi Prefecture. Note that damage inland was minimal, since Japan has strict building codes to prevent severe damage to large buildings. But coastal cities didn't stand a chance - the water flattened everything in it's path until it ran out of energy and receeded.
Coastal areas were all but completely wiped out by the force of the wave itself. Areas further inland incurred flood damage, and it is suspected that it also caused problems with Japans electrical grid and caused fires, but it is uncertain whether that was the cause or if it was the earthquake.