Today Damien from Natural Resources Management SA came to our classroom. Since we have been learning about groundwater systems, and how to keep water sources clean, in general, he brought some water from the Valley Lakes area. We were able to assess the health of the water by examing the macroinvertebrates that we found in it.
Some of the macroinvertebrates we found were ones that are very resilient and can live in most bodies of water. But we also found lots of macroinvertebrates that are very sensitive to polluted water, so that gave us a strong indication that the Valley Lake water is fairly free from pollution.
The children were fascinated by the variety of the macroinvertebrates they could find, and they really enjoyed finding and identifying them, especially the ones that were sensitive to pollution.