EESC BC 1001x Lecture Notes - Lecture 4: Riverbank State Park, Sewage Treatment, Palaemonetes
20 Sep 2016
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Document Summary
Density of water varies with salinity and temperature. Density = mass/volume (units are in g/ml) Density of water at 39 f (4 c) is 1 g/ml. Density of salt water is > 1g/ml. So, saltwater is more dense than freshwater. If saltwater meets freshwater, the saltwater would become the bottom layer and the freshwater would be the top layer. This layering is called salt stratification or salt wedge . Cold water more dense than warm water. If cold water meets warm water, the cold water would be the bottom layer. Salt front: when the tide comes in and floods up the river, the leading edge of the salt water is called the salt front . The salt front is defined as 100 mg/l chloride concentration. 100 mg/l same as 0. 1 g/l = psu = ppt. In the hudson river water, oxygen ranges from 8 14 mg/l. Oxygen content of water is critical for an aquatic organism"s survival.
