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wave energy on the shore

 
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natalie
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Joined: 24 Oct 2004
Posts: 37
Location: Nearwater

PostPosted: Sun Oct 31, 2004 4:47 pm    Post subject: wave energy on the shore Reply with quote

Hello
Wondered just how much energy was dissapated on a rocky shore when a wave crashed in (say a wave of 1

meter). I know that energy does not dissappear, so where does it go?

Appreciate any thoughts, thanks
Natalie
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administration
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Joined: 24 Oct 2004
Posts: 47
Location: Nearwater

PostPosted: Wed Nov 03, 2004 12:26 am    Post subject: Reply with quote

Up to 100 kilo watts for each meter of wave front can be heading onto the shore.

Your thinking that energy is not lost, just changed to

something else is indeed a central point in wave energy;

The making of wave energy is conversion of solar energy:
The sun produces heat on the planet, but

the heat level is different in certain areas and that causes the air to move around and so the wind starts (a conversion of the solar energy).
The wind over an ocean

causes ripples and more wind over the ripples causes then to grow in size and eventually in time over a large distance of ocean a swell is formed (from the increased

conversion of the wind energy).

The dissipation of the wave energy at the shore line is converted into several other energys:
Noise is one energy that can be

recognised when the wave 'crashes' in.
Heat is another energy (which is usually what noise changes into)
Movement is another form of energy, in that a wave

can shift pebbles and sand around and can, amongst other things, build up beaches (this energy is stored in the beach and is known as potential energy)

I often

wonder if any of the shoreinhabitants harness or use any of this energy for various purposes.
Hope this helps a little, it is a great question Natalie,

thanks.
Stephen
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Melanie



Joined: 25 Oct 2004
Posts: 26
Location: Torbay

PostPosted: Mon Dec 13, 2004 5:25 am    Post subject: Reply with quote

Yep the thoughts of any inhabitants harnessing the energy is indeed a interesting one. It is there so do they tap it.

Has anyone actually thought along these lines or are we isolated cranks! Wink
Mel x
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bethany
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Joined: 28 Feb 2005
Posts: 19
Location: Nearwater

PostPosted: Sun Aug 07, 2005 6:32 am    Post subject: Reply with quote

Making use of the wave energy is a great thought indeed.
Well established studies of effects of wave energy on

shores have determined that sea creatures adapt to survive AROUND the effect:

* most sand residing creatures in the littoral zone have ability to sense and alter

their depth in sand to counter the transportation and deposition of particles.. this may be erosion or deposition depending on state of tide and wave type ie razor shells,

masked crabs, lugworms.

* some rock-area dwelling creatures have the ability to attach and streamline in relation to resisting their own movement due to water

thrust through wave motion ie barnacles, mussels, anemones.

* some rock-area dwelling creatures have the ability to wedge themselves to resist being shifted

around ie shore crabs, urchins, sea slaters.

.... But to actually utilise the energy? (beside using its flow effect to pass food particals in front of creature to feed

on..but that is somewhat indirect) ... great question.

Beth
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