Why do tsunamis (20~ft) cause more damage and flooding than the waves that surfers surf (world record 86ft)?

Question

Why do tsunamis (20~ft) cause more damage and flooding than the waves that surfers surf (world record 86ft)?

In: 2

Answer 1

Imagine you have a ramp

Now you make 20 Snowballs and place them in a line so that they can roll down the ramp next to each other.

Now you make 2000 Snowballs and place 20 next to each other but 100 Snowballs deep.

Can you imagine the difference, the snowballs have all the same size (heigh)