What various fish, insects, wind etc will make vwakes in Flat A$$ Calm tidal estuaries?
I was looking over some areas for a prominent baitfish and I noticed some V-wakes just out of range of seeing what is underneath. I'm looking for your thoughts on what else beyond herring are likely to scoot at a few miles per hour and leave a wake on the surface....
John,
Squid - noticed quite a few in last nights calm conditions. They will appear singularly or in pods of 4-12. I noticed some in schools of 100 or so last night.
DZ
DZ
Recreational Surfcaster
"Limit Your Kill - Don't Kill Your Limit"
Bi + Ne = SB 2
If you haven't heard of the Snowstorm Blitz of 1987 - you someday will.
Like Dennis said, it could be squid but then again as we enter the full first week of May the worm spawn could start happening and they leave little V wakes all over the place.
Not to sound like a wise ass but from a hydrodynamic standpoint just about anything moving beneath the free surface leaves a wake...has to. Even at very deep depths...the waves may be so small or masked by wind-generated waves so you can't visually pick them out but they are there. As a body gets closer to the free surface the waves become larger in amplitude and more visible. Wave generation is primarily a function of vessel speed and depth below free surface. When the body is within a couple diameters of the free surface it causes significant forces on the body below making it difficult to maintain a near surface depth without active control (fish are good at this).
Below is an image of a simulation I did of a submerged spheroid at a Froude number (a non-dim speed number) of 0.6 and depth to Length ratio of .245. The colors are wave height above (blue) or below (purple) the mean free surface.
End of today’s hydro lesson...
Last edited by Mr. Sandman; 05-05-2005 at 01:16 PM..
Tuna fisherman know that equation. Bluefin do it all the time being that thier body mass displaces so much water when near to the surface. The old wake without the boat thing.
OK wise ass - actually, pretty informative. However, I will venture a guess that a Virginia Class SSN won't ever be lurking at this spot - depth - 2 feet even if it could make it under the 5 foot bridge
and I noticed some V-wakes just out of range of seeing what is underneath. I'm looking for your thoughts on what else beyond herring are likely to scoot at a few miles per hour and leave a wake on the surface.... 
- actually, pretty informative. However, I will venture a guess that a Virginia Class SSN won't ever be lurking at this spot - depth - 2 feet 
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