| 1. | The Secchi disk is commonly used to test for eutrophication.
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| 2. | In 1940, researchers measured a Secchi disk depth of.
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| 3. | The lake's water transparency is good, with a Secchi disk depth of.
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| 4. | Secchi disk measurements do not indicate how attenuation changes with depth or particular wavelengths of light.
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| 5. | Water clarity in the lake is low, with secchi disk measurements averaging less than 3 meters.
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| 6. | Turbidity in lakes, reservoirs, channels, and the ocean can be measured using a Secchi disk.
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| 7. | It is one of the most transparent lakes in the world, with Secchi disk visible more than deep.
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| 8. | He invented the Secchi disk, which is used to measure water transparency in oceans, lakes and fish farms.
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| 9. | The underwater viewer can be used for observing reefs, checking boat moorings, secchi disks and other survey work.
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| 10. | The transparency of the water, which determines the depth of the photic zone, is measured simply with a Secchi disk.
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