Parent Layer: Seafloor

Display Field: Block

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This dataset is a summary of sediment characteristics obtained from various studies and displayed in a grid format. The sediment characteristics include: the average sediment grain size (phi), average percent sand of a sample, and the thickness in meters of the surficial sand layer off the coast of SC and NC between 32 and 24 degrees latitude, and between the coast and the 200 meter bathymetric line. Data from all sampling efforts have been summarized in a 1x1 minute latitude/longitude grid and may have included one or more seasons.The data were obtained from reports of beach renourishment studies and ocean dredge material disposal sites (ODMDS). Numerous nearshore studies have evaluated the distribution of sediments for a variety of purposes. These include core and sub-bottom sonar profiling to evaluate the thickness of the surficial sand lens, and studies that have evaluated the characteristics of surficial sediments collected in conjunction with benthic community sampling for various environmental studies. Data from many of these programs (through 1999) were summarized as part of a multi-year effort by the South Carolina Task Force on Offshore Resources through funding from the Minerals Management Service Office of International Activities and Marine Minerals (INTERMAR). Those data were summarized by Weinbach and Van Dolah (2001). Refer to the 'BenthicMetadata' table included in this geodatabase for more information about the various data sources. This dataset was created to display general trends of average sediment grain size (phi), average percent sand of a sample, and the thickness of the surficial sand layer (sand lens) off the coast of SC and NC between 32 and 34 degrees latitude and between the coast and the 200 meter bathymetric line. This project was made possible through funding provided by the South Carolina Energy Office so that these biological data can be considered for any planned energy development or other coastal use activities.

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Spatial Reference: 102100 (3857)

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Fields:

• OBJECTID (Type: esriFieldTypeOID, Alias: OBJECTID)
• Block (Type: esriFieldTypeString, Alias: Block, Length: 8 )
• N_PctSand (Type: esriFieldTypeSmallInteger, Alias: N_PctSand)
• AvgPctSand (Type: esriFieldTypeDouble, Alias: AvgPctSand)
• CV_PctSand (Type: esriFieldTypeDouble, Alias: CV_PctSand)
• N_Phi (Type: esriFieldTypeSmallInteger, Alias: N_Phi)
• AvgPhi (Type: esriFieldTypeDouble, Alias: AvgPhi)
• CV_Phi (Type: esriFieldTypeDouble, Alias: CV_Phi)
• N_SandDep (Type: esriFieldTypeSmallInteger, Alias: N_SandDep)
• AvgSandDep (Type: esriFieldTypeDouble, Alias: AvgSandDep)
• CV_SandDep (Type: esriFieldTypeDouble, Alias: CV_SandDep)
• Shape (Type: esriFieldTypeGeometry, Alias: Shape)
• Shape.STArea() (Type: esriFieldTypeDouble, Alias: Shape.STArea())
• Shape.STLength() (Type: esriFieldTypeDouble, Alias: Shape.STLength())

Type ID Field: N/A

Supported Interfaces:   REST

Supported Operations:   Query