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Max Online: 36273 @ 01/23/13 02:34 PM
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#11681165 - 06/21/16 09:05 PM Thermocline on Sandlin?
aggieman775 Offline
Outdoorsman

Registered: 04/27/15
Posts: 70
Has anybody found the thermocline on Bob Sandlin? We thought we found it in 22 feet today but then it looked like it was in 12 feet once we moved to 18 foot of water? I guess our electronics are not good enough. Anybody know where it's at?
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#11682229 - 06/22/16 12:29 PM Re: Thermocline on Sandlin? [Re: aggieman775]
DEFMP Offline
Angler

Registered: 10/18/13
Posts: 299
Loc: DFW
if you're looking early in the morning or later at night you may be seeing plankton, not a thermocline.

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#11682254 - 06/22/16 12:41 PM Re: Thermocline on Sandlin? [Re: DEFMP]
CoachCBA Online   content
TFF Celebrity

Registered: 07/10/10
Posts: 5490
Loc: Whitehouse, TX
Originally Posted By: DEFMP
if you're looking early in the morning or later at night you may be seeing plankton, not a thermocline.


Is that what seems to fill up the entire screen after dark? Always wondered what that was.
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#11682279 - 06/22/16 12:52 PM Re: Thermocline on Sandlin? [Re: aggieman775]
aggieman775 Offline
Outdoorsman

Registered: 04/27/15
Posts: 70
It strange because it's a straight line like the thermocline. That makes since though because that should be to shallow for it. If that is not thermocline do y'all know where it is?
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#11682294 - 06/22/16 12:59 PM Re: Thermocline on Sandlin? [Re: aggieman775]
DEFMP Offline
Angler

Registered: 10/18/13
Posts: 299
Loc: DFW
No I haven't been to Sandlin in awhile, but on Cypress it was at around 20-22'. If you want to get rid of the Plankton, and have Humminbird graphs, change the sonar to clear mode and not max mode. Then increase sensitivity to your liking

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#11682295 - 06/22/16 01:00 PM Re: Thermocline on Sandlin? [Re: aggieman775]
Wayne P. Offline
TFF Team Angler

Registered: 11/16/10
Posts: 3441
Loc: Charlottesville, Va
Originally Posted By: aggieman775
It strange because it's a straight line like the thermocline. That makes since though because that should be to shallow for it. If that is not thermocline do y'all know where it is?


Plankton. It can look like a thermocline during low light/dark.

It can also be in columns like this that was gone a couple of hours later in the morning:

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Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1

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#11682329 - 06/22/16 01:26 PM Re: Thermocline on Sandlin? [Re: aggieman775]
collincountytx Online   content
TFF Guru

Registered: 04/08/08
Posts: 10041
Loc: Dallas, TX
With all the runoff we've had the last two years, there will be more sediment in the water and lower water clarity at deeper depths/less light penetration at deeper depths=shallower than typical thermocline on most lakes that got all this rainfall.

I suppose a large lake could temporarily have thermoclines at different levels on the same body of water, with a shallower thermocline in areas that have received recent run off and a deeper thermocline in an area downstream. Particularly if the downstream areas are rockier. And the feeder creek areas are more clay/dirt composition.
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#11682468 - 06/22/16 02:47 PM Re: Thermocline on Sandlin? [Re: DEFMP]
Wayne P. Offline
TFF Team Angler

Registered: 11/16/10
Posts: 3441
Loc: Charlottesville, Va
Originally Posted By: DEFMP
No I haven't been to Sandlin in awhile, but on Cypress it was at around 20-22'. If you want to get rid of the Plankton, and have Humminbird graphs, change the sonar to clear mode and not max mode. Then increase sensitivity to your liking


I use Switchfire Clear all the time and do not adjust the Sensitivity to see the thermocline or plankton (default setting). If anything you would reduce the sensitivity setting to eliminate those returns.



The thermocline is recorded on the Imaging views and 2D of a Side Imaging unit:

_________________________
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1

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#11682570 - 06/22/16 03:34 PM Re: Thermocline on Sandlin? [Re: aggieman775]
Clint H. Online   content
Outdoorsman

Registered: 04/23/16
Posts: 40
Loc: N.E. Texas
Will p.p.lakes like welsh or monti develop a thermocline.. or even get any cooler at all. Or will they be the same temp. Throughout the whole column from top to bottom
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