Therefore, Secchi disc
depth was used to evaluate the euphotic zone, according to Padial and Thomaz (2008).
Seasonal patterns of chlorophyll, nutrient concentrations and Secchi disc
transparency in Florida lakes.
If there are any doubts at all about the water's clarity, a Secchi disc
is a simple tool used to qualitatively measure water clarity (or alternately it's "turbidity").
However, on the whole Secchi disc
transparency was low at the littoral sites being minimum at site-III which may be due to the increased suspended matter, silt load and humus brought in from the catchment area as well as due to rich macro-vegetation.
Water transparency was determined using a Secchi disc
Transparency was evaluated using a standard 20cm diameter Secchi disc
having black and white quarters.
Transparency was measured with a Secchi disc
, and silicate according to the method of Mullin & Riley (Aminot & Chaussepied 1983).
Transparency was determined with a 30 cm diameter Secchi disc
Graves uses a Secchi disc
to monitor algae growth in Lake Shirley.
Sometimes a Secchi disc
is used, which is a multicolored device approximately 6 inches in diameter.
At each site, physical parameters were measured using a YSI, an air thermometer, and a secchi disc