Fatality - Northland
Posted 15 October 2019 - 09:51 PM
Ill have to dig out an old stage 3 marine physics text.
Posted 15 October 2019 - 10:04 PM
From university of Hawaii oceanography dept.
Posted 15 October 2019 - 11:22 PM
Posted 16 October 2019 - 12:58 AM
Bavaria 47? Be interesting to know what happened when it comes out.
Posted 16 October 2019 - 04:27 AM
BP, maybe you are correct as far as a wave energy is concerned. We all know water cannot be compressed. But there must be some other physical factor involved.
Here's an additional thought to that. The Sea State can be vastly increased in magnitude over a Shoal Bank that may still be considered deep water. I am thinking of the Banks along the East Coast off Gisborn to East Cape region. They are still deep water, but no where near the depth around them. The Sea State over them in a blow can be horrendous. There could perhaps be a tidal flow over them maybe that is not out in the deeper water maybe. I don't know, just a thought
Then 1200ft between crests.
There is no compression only rotation. A particle of water describes a circle as a wave passes. Those circles get smaller with depth. Motion effectively disappears when depth is half wavelength.
Posted 16 October 2019 - 06:32 AM
Bp...not sure how that works with my previous example ...serious effects in a submarine at 400ft deep!
Means the wave crests were 800ft apart at the suface.
Posted 16 October 2019 - 06:44 AM
Posted 16 October 2019 - 08:43 AM
Posted 16 October 2019 - 11:00 AM
The BOP Regional Council have a wave bouy out off the coast. It records a lot of variables, one is the period. Check it out as the significant period has ranged 3-11sec over the last month, mean period 3-8 sec and height around 3m and a max of 8m etc.
Considering its fixed these are large variations in water behaviour .......
Ross 650 Farr 940
Posted 16 October 2019 - 05:45 PM
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