Turnover

[straw hat]

I found a nifty Disolved Oxygen table. Of course it doesn't allow for decay of organic materiaal but only for optimun dissolved oxygen at various temps. I will post a temperature conversion chart in a few minutes.

Table 1

Solubility of Oxygen (mg/L) at Various Temperatures and Elevations

(Based on Sea Level Barometric Pressure of 760 mm Hg)

Temperature Elevation, Feet Above Sea Level ^oC 0 1000 2000 3000 4000 5000 6000 0 14.6 14.1 13.6 13.2 12.7 12.3 11.8 2 13.8 13.3 12.9 12.4 12.0 11.6 11.2 4 13.1 12.7 12.2 11.9 11.4 11.0 10.6 6 12.4 12.0 11.6 11.2 10.8 10.4 10.1 8 11.8 11.4 11.0 10.6 10.3 9.9 9.6 10 11.3 10.9 10.5 10.2 9.8 9.5 9.2 12 10.8 10.4 10.1 9.7 9.4 9.1 8.8 14 10.3 9.9 9.6 9.3 9.0 8.7 8.3 16 9.9 9.7 9.2 8.9 8.6 8.3 8.0 18 9.5 9.2 8.7 8.6 8.3 8.0 7.7 20 9.1 8.8 8.5 8.2 7.9 7.7 7.4 22 8.7 8.4 8.1 7.8 7.7 7.3 7.1 24 8.4 8.1 7.8 7.6 7.3 7.1 6.8 26 8.1 7.8 7.6 7.3 7.0 6.8 6.6 28 7.8 7.5 7.3 7.0 6.8 6.6 6.3 30 7.5 7.2 7.0 6.8 6.5 6.3 6.1 32 7.3 7.1 6.8 6.6 6.4 6.1 5.9 34 7.1 6.9 6.6 6.4 6.2 6.0 5.8 36 6.8 6.6 6.3 6.1 5.9 5.7 5.5 38 6.6 6.4 6.2 5.9 5.7 5.6 5.4 40 6.4 6.2 6.0 5.8 5.6 5.4 5.2

[straw hat]

OHHH Forget that. It didn't look like that when I attached it. I will try again. Sorry

[straw hat]

Well, %^#@^&(_@! my computer skills!! I couldn't get it to copy over so I am just typing it. Here goes.

0 Centigrade 14.6 ppm 32 F

5 C 12.8 41 F

10 C 11.3 50 F

15 C 10.1 59 F

20 C 9.1 68 F

25 C 8.2 77 F

30 C 7.5 86 F

35 C 6.9 95 F

[jbeenemd]

Strawhat, I can not explain what is happening right now. With so little water inflow and high water temps, the lake is acting like it is stagnant. Not yet a turnover. Wonder what the big boys at Mo Dept of Conservation have to say about this. Maybe they don't know or they would have said something by now.

Jackie

[straw hat]

Obviously I am not sure either. If I had a temperature profiler (a thermometer with a long cord, say 50') and a dissolved oxygen meter it wouldn't take me very long to find out what is going on but I don't have access to those things anymore. Your suggestion about contacting the Mo. Dept. of Conservation is a good one. I have talked to the new bioligist for Stockton a couple of times but can't remember his name. I will try to dig it up and give him a call next week. He certainly would have access to the right equipment. I know he loves his walleye program and oxygen depletion is really hard on walleye populations so he would probably be concerned.

[straw hat]

I found his name. It is Adam Bowman and is in the Springfield office. I will call him next week.

[jbeenemd]

Excellent Strawhat!!!

[straw hat]

I am attaching a file that summarizes my conversation With Adam Bowman from MCC.

Turnover.doc

[minnowhooker]

Good info Thanks Straw Hat

[frying eyes]

Thanks straw hat, great info! I'll be there tomorrow, going for some crappie.