Name: Sediment Distribution

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Description: Sediment sample locations were randomly generated using ArcView GIS software. Engineering judgment was used to determine sufficient point coverage/sample location density to assure that major thorofares and waterways were covered by the sampling plan.Coordinates of each point were programmed into the research vessel’s Global Positioning System (GPS) that was used to navigate to for collection of the sediment sample. Cores were collected using 2” diameter lexan coring tubes equipped with a steel handle and rubber piston. The length of the sediment core was a function of the depth of the water at the time of the sampling, and the material being sampled (i.e. cores in shallow water with higher percentage mud were generally longer than sandy cores in deeper water). If water depth at the randomly generated sampling position was too deep to obtain a sample, adjustments were made to the core location as needed to reduce the sampling depth while still retaining the desired sampling density on the county-wide scale.Field notes and photographs of the sample’s composition were recorded in the field and the sample was stored for further testing. In the lab, each core sample was cut in half longitudinally to reveal the depositional stratigraphy and composition. Stratigraphic logs were prepared and photographs taken. A composite of the material from each core was created for the grain size analysis. A sub-sample of the composite was wet-sieved to separate the sand (>0.0625mm, 4.0 phi) from the silt/clay (<0.0625mm, 4.0 phi). The resultant sand portion was then used to describe statistical parameters such as color and mean grain size.

Copyright Text: Stockton University - Coastal Research Center 30 Wilson Ave. Port Republic, NJ 08241 E-mail: crc@stockton.edu Phone: (609) 652-4245

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