Size of Flocs Suspended in Delaware Bay

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Abstract
This study extended from the Delaware River down the Delaware Bay into the upper Delaware Bay. The suspended material concentration in the lower Delaware River and upper Delaware Bay was determined by filtration, and the size and nature of flocs were determined by optical microscope. The principal turbidity maximum, at a salinity of 1‰ was composed of the largest flocs (up to 130 μm diameter), and sizes found in the water column decreased progressively down the Bay. This maximum was probably related to the formation of flocs. A second turbidity maximum, not related to floc formation or resuspension, may have occurred at a salinity of 5‰.Key words: flocs, turbidity maximum, Delaware Bay

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