Lake Kanasatka Water Quality Monitoring
Pictures of our visit with the UNH team on Friday August 4, 2006. This is Bob Craycraft, Karen and John, his environmental education students who accompanied him.
The pictures span the collection of different measurements/samples that provide insight into what is going on within the water column (from the surface to the lake bottom). We collect continuous measurements of temperature, oxygen, conductivity (a surrogate for salts), turbidity (particulate matter), pH etc from the surface down to the lake bottom at roughly 0.1 meter (4 inch) increments with submersible probes that are interfaced with a digital logger via a submersible cable.
We also collect water transparency measurements with a standardized 8 inch diameter disk, known as a Secchi Disk, that is lowered into the water column to provide a measure of water clarity. We also have a digital meter that measures underwater light penetration (that acts as a digital Secchi Disk).
We have a sampling device, known as a Van Dorn, that is lowered into the water column and that collects samples at specified depths (generally at the surface, in the middle of the lake and near the lake bottom).
I tried to categorize the pictures into the general sampling categories below. ~ Bob Craycraft
Click on a photo for a closer look
