Why would the water wave speed change when we pass a wave from deep water shallow region?

Question

anonymous · Answer

Are you talking about transverse water waves that is INSIDE water?

anonymous · Answer

yes

anonymous · Answer

I really have a hard time understanding how transverse waves are formed INSIDE water in the first place.. :D.. 

But maybe due to pressure variation.. the speed may change!

amistre64 · Answer

not sure if im reading it right, but I think there is some conservation property working at it.

whpalmer4 · Answer

Deep water waves propagate at a speed related to the wavelength, but shallow water waves propagate at a speed that is the square root of the product of the water depth and the acceleration due to gravity.  Shallow and deep are defined in terms of a half or quarter of the wavelength, as I recall, which means something with a long wavelength, like a tsunami wave, can move very fast because most of the ocean will be "shallow".