Secchi depth

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noun

the depth at which a Secchi disk is no longer visible from the surface of ocean water.

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Words nearby Secchi depth

SECAM, secant, secateurs, Secaucus, Secchi, Secchi depth, Secchi disk, secco, secede, secern, secession

Scientific definitions for Secchi depth

Secchi depth

[ sĕk′ē ]

A measure of the clarity of water, especially seawater. Secchi depth is measured using a circular plate, known as a Secchi disk, which is lowered into the water until it is no longer visible. High Secchi depths indicate clear water; whereas low Secchi depths indicate cloudy or turbid water. See also Secchi disk.