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Thermocline on river

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Has any one ever dropped there AquaVue to the bottom of the river in over 50 fow, the AquaVue with the temperature sensor that is? I've read that the river doesn't have a thermocline, and I understand water flow and rivers, but I'm curious about what people have found. Has anyone found a distinct temperture differnce that would indicate a theromcline? Also please indicate what time of year you have dropped the camera into the deep.

Keep catchin'


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Turk, I saw a presentation last fall that indicated that Lake St. Croix has a definite summer thermocline. I can't remember specifics, but for the period observed it seems it was relatively shallow. In addition, it had notable DO sags below the thermocline.

I can't seem to find the presenation or report posted on-line, but I believe the work was done by USGS and/or the St. Croix Research Station. Wish I could find it - it was interesting.

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