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# How does the depth of water affect wave speed? watch

1. I'm doing my controlled assessment for physics... However, I can't really find any research that I can understand or convert to simpler terms to write down in my hypothesis... I know that as the depth of the water increases, so does the wave speed but I'm not sure on why. Thanks.
2. (Original post by KitsuneRaiju9786)
I'm doing my controlled assessment for physics... However, I can't really find any research that I can understand or convert to simpler terms to write down in my hypothesis... I know that as the depth of the water increases, so does the wave speed but I'm not sure on why. Thanks.
I believe it's to do with friction.

In shallow waters, water waves experience a frictional drag from the bottom of the surface (i.e. bottom of a tray).

In deeper waters, you have water waves moving over water waves. There is less friction and the speed is greater.
3. (Original post by crashMATHS)
I believe it's to do with friction.

In shallow waters, water waves experience a frictional drag from the bottom of the surface (i.e. bottom of a tray).

In deeper waters, you have water waves moving over water waves. There is less friction and the speed is greater.
For sufficiently shallow water, you'll find that the wave speed is , where is the depth and is the acceleration due to gravity. For deeper water the equations get more complicated and depends also upon the wavelength nested in the term , which you can think of as the relative depth of the water.

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