Lakes

Group effort: long-term water clarity study a collaboration of scientists and the public

Researchers say that water clarity has not changed much in Midwestern lakes in recent decades. The analysis is based on a long-term collaborative between scientists and the public. Both groups have monitored water clarity in over 3, 000 lakes over several decades, compiling extensive data.

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Underwater view of a Secchi disk, used to measure water clarity, dropping through the water column.

Photo: Adam Hinterthuer, NSF