[Paddlewise] Speed efficiency as water temps change

I'm learning navigation using Burches book "Kayak Navigation" (thanks for
the suggestions some months ago).  In it, he mentions that speed efficiency
is dramatically reduced in shallow water (1-2 feet) as opposed to deeper
water (generally over 3 feet) due to the affects of the hull tubulance and
so forth running into resistance from the bottom.  Okay, I'll buy that,
because I've noticed it myself as I travel across the Poquoson Flats near
the Plum Tree Island Wildlife Refuge at the lower end of the Cheseapeake
Bay.  Seems like I always slow down when I cross them.

Brings up a thought, though, that he didn't (or hasn't yet) discussed.
Water temperature is a result of the speed of the atoms/ neurons/molecules
or whatever (I'm not all that scientific) - the faster they move, the higher
the temperature.  So, if you are passing through a body of water with the
atoms (or whatever it is - humor me) themselves moving at varying speeds,
will it affect your speed?  Seems like the colder water (therefore slower
moving atoms, and therefore less resistence / counteraction to other motion)
would allow for faster boat speed.  But, it also seems like it might be
measureable in highly controlled experiments, but to the average paddler
would be unnoticable.

I'm also starting to wonder about water salinity, but we can save that one
for later....

So, what do you think?  Any thoughts?  

Rick - Poquoson,VA


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