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Secchi depth

    0.01 sec.
Sec·chi depth  (sk)
n.
A measure of the cloudiness or turbidity of surface water.

[After the Secchi disk.]

Secchi depth  (sk)
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.


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In the late 1950s and early 1960s the registered Secchi depth was more than 8 m and in summertime the water above the lake bottom was supersaturated with oxygen (Maemets 1968), however, at the present time the water transparency of the lake has been 3.
As 19 of the 21 estimations of the coverage [greater than or equal to]60% and Secchi depth [less than or equal to] 2.
The variables included in the regression model were sampling date (day of year), sampling time of day (sine-transformed), station distance from coastline (km), surface temperature ([degrees]C), surface salinity ([per thousand]), Secchi depth (m; a coefficient of light extinction or water clarity), water depth (m), and cross- and long-shelf wind speed (positive east and north, respectively).
 
 
 
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