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Symbol Package
Measuring Secchi depth in frozen water presents a challenge.
Secchi disc on ice
Measuring Secchi depth in winter presents a challenge.
Winter Secchi depth = 0
Measuring Secchi depth in frozen water presents a challenge.
Winter Secchi depth
Conceptual diagram illustrating an example of a designated use area in a body of water that is used to determine the threshold values that are used in ecological indicators.
Determining threshold values
Illustration of person measuring secchi depth
Measuring secchi depth
Illustration of person measuring secchi depth
Measuring secchi depth 2
Conceptual diagram illustrating the differentiating aspects between a coastal bay, and a larger river-valley bay, more specifically, The Chesapeake Bay.
Coastal lagoon vs. river-valley estuary
Conceptual diagram illustrating the methodology in analyzing the nitrogen in a water source using macroalgae as a bioindicator.
Nitrogen stable isotope methodology
Conceptual diagram illustrating the factors that influence how much light is absorbed by seagrass. This includes phytoplankton, organic matter, suspended sediment, and the epiphytes that grow on the seagrass.
Relative light attenuation for seagrass
Recording water quality measurements from a YSI sonde while monitoring in Monie Creek, part of the Monie Bay National Estuarine Research Reserve.
Monitoring water quality
Illustration of water quality management factors
Water quality management
Illustration of secchi disk
Secchi disk

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