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Joined: May 2014
Posts: 3,864 Likes: 298
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OP
Joined: May 2014
Posts: 3,864 Likes: 298 |
In the hottest days of summer here in east Texas, a distinct thermocline occurs in almost all bodies of water. At my place, where the max depth is 21 feet, the thermocline usually forms around 9 feet deep.
I haven't measured the water temps below the thermocline, though I do know the top layer gets to the upper 80s, maybe even 90 at times. But I'd be interested to know what other pondmeisters have found re temperatures below the thermocline. How big a difference? Does the bottom water, here about 12 to 21 feet, stay below 72F all summer? Below 75?
Yeah, I get it: "It depends." But at least I'd like to have some idea of what similar BOW do.
Last edited by anthropic; 05/28/21 06:23 PM.
7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160
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Joined: Sep 2014
Posts: 3,668 Likes: 57
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Joined: Sep 2014
Posts: 3,668 Likes: 57 |
Wish I could help but it has been a long time since I measured the temps top to bottom prior to adding the diffusers. And in the past 5 yrs, the diffusers have eliminated the thermocline. My memory kinda sucks but I think there was a 7-degree difference at the thermocline prior to adding the diffusers. I want to think the water temps have reached 91 one time in August. It is hard on the HSB and not so much on the LMB.
Do not judge me by the politicians in my City, State or Federal Government.
Tracy
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1 member likes this:
anthropic |
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Joined: May 2014
Posts: 3,864 Likes: 298
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Joined: May 2014
Posts: 3,864 Likes: 298 |
Thanks, Tracy. I'd like to oxygenate the bottom layer such that both HSB and LMB would be comfortable & unstressed, even on the hottest summer day. Gotta think that both would be healthier without heat stress. Heck, maybe even keep cool/cold water fish alive over the summer.
That's a tall order, though. Still trying to find a way.
Last edited by anthropic; 05/29/21 03:03 PM.
7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160
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Joined: May 2018
Posts: 1,902 Likes: 281
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Joined: May 2018
Posts: 1,902 Likes: 281 |
To oxygenate cool water, you need a way to oxygenate cold water without mixing the waters above. So it won't be standard aeration. I am reminded of how some indoor systems supersaturate water using high pressure injection of air or oxygen. If you draft cold water, saturate it, and then discharge at or below the thermocline ... Maybe?
As for the minimum temp below the thermocline, this would be the ground water temp. This would be the lower limit and could be low enough in a deep pond to sustain trout provided it is near saturation of oxygen.
It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers
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Joined: May 2014
Posts: 3,864 Likes: 298
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OP
Joined: May 2014
Posts: 3,864 Likes: 298 |
To oxygenate cool water, you need a way to oxygenate cold water without mixing the waters above. So it won't be standard aeration. I am reminded of how some indoor systems supersaturate water using high pressure injection of air or oxygen. If you draft cold water, saturate it, and then discharge at or below the thermocline ... Maybe?
As for the minimum temp below the thermocline, this would be the ground water temp. This would be the lower limit and could be low enough in a deep pond to sustain trout provided it is near saturation of oxygen. Good thoughts. If it ever happens, will likely be something along these lines
7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160
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Joined: May 2014
Posts: 3,864 Likes: 298
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Joined: May 2014
Posts: 3,864 Likes: 298 |
Thanks, Eric! Good info, obviously my BOW will be somewhat different, but at least it gives me an idea. My place is of similar depth, max 21 ft.
Last edited by anthropic; 06/03/21 02:52 PM.
7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160
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