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pl23_fizh0137.jpg

Lowering Secchi disk to determine relative turbidity (amount of suspendedsediment) in the water

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https://www.noaa.gov/media/digital-library-photo/pl23fizh0137jpg

Description

Lowering Secchi disk to determine relative turbidity (amount of suspendedsediment) in the water. The depth at which the disk is no longer visible can be related to the amount of suspended material in the water.

Credit

NOAA Central Library Historical Fisheries Collection

Photographer

J. Olson BCF

Display Date

1960 circa

Location

Alaska Southeast

Collection

Historic Fisheries