As part of the project, a special dye that can be measured with an instrument called a fluorometer was added to the water flowing into the pond when it rained.
Samples of the water were taken from different locations in the pond to measure the concentration of dye.
In the middle from a boat
From the bank
Taking samples of water flowing out of
the pond was a bit lonely!
Measuring the dye concentration
Automatic measurement of the dye
Water was also pumped from two locations at the pond through two fluorometers to automatically measure the dye concentration.
You can see the hoses from the pond to the fluorometers in the picture below. A computer was used to automatically record the measured concentrations.
A view from above
During one experiment a video camera was suspended from a helium blimp to videotape the dye moving through the pond.
Source: http://www.civag.unimelb.edu.au/~psc/mon.html 08/10/2001