A sediment trend analysis (STA(r)) and an acoustic bottom classification (ABC) in eastern Monterey Bay, Moss Landing: Implications to dredge disposal operations

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Patrick McLaren

Originator: GeoSea Consulting

Publication_Date: 2000

Title:

A sediment trend analysis (STA(r)) and an acoustic bottom classification (ABC) in eastern Monterey Bay, Moss Landing: Implications to dredge disposal operations

Geospatial_Data_Presentation_Form: Digital

Publication_Information:

Publication_Place: Brentwood Bay, British Columbia

Publisher: GeoSea Consulting

Other_Citation_Details:

Data from CD-ROM held at Moss Landing Harbor, 7881 Sandholdt Road, Moss Landing, California 95039, (831) 633-2461

Description:

Abstract: No specific abstract is given in the report or on the CD-ROM

Purpose:

The specific objectives of this study are: Collect about 600 sediment grab samples from the study area. Analyze all samples for their complete grain-size distributions and input into a Geographic Information System (GIS). Classify and map, using information from the grab sampling program and the acoustic data collected from ABC, bottom types (including the area presently being affected by the ongoing disposal program) from the nearshore to a depth of nearly 300 m, and include this information in the GIS. Undertake STA using proprietary software developed by GeoSea in order to establish the patterns of net sediment transport, areas of erosion, deposition, and dynamic equilibrium. Discuss (i.e., compare and contrast) the results of STA with the present understanding of processes as described in existing work. Use the results of the grain-size analyses, ABC, and STA to: (i) Map sediment transport pathways and their dynamic behavior throughout the study area; (ii) Identify sediment sources and sinks; (iii) Delineate the area potentially impacted by disposal operations; (iii) Propose optimum locations for specific process measurements required to determine transport rates, if desired; (iv) Determine the potential long-term fate of contaminants that may be contained in the sediments. (v) Advise, if applicable, on disposal options to mitigate undesirable affects.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1999

Currentness_Reference: Publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -121.87199

East_Bounding_Coordinate: -121.7752

North_Bounding_Coordinate: 36.85633

South_Bounding_Coordinate: 36.74734

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Moss Landing Harbor District

Theme_Keyword: GeoSea Consulting, LTD

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: Oceans and Estuaries

Theme_Keyword: Location

Theme_Keyword: GeoscientificInformation

Theme:

Theme_Keyword_Thesaurus:

NASA/Global Change Master Directory (GCMD) Earth Science Keyword. Version 5.3.3

Theme_Keyword: Marine Sediments

Theme_Keyword: Sedimentary Textures

Theme_Keyword: Terrigenous Sediments

Place:

Place_Keyword_Thesaurus: GNIS

Place_Keyword: Moss Landing

Place_Keyword: Monterey Bay

Place_Keyword: California

Access_Constraints: Data held on CD-ROM at Moss Landing Harbor District offices.

Use_Constraints: None

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Moss Landing Harbor District

Contact_Address:

Address_Type: Mail and Physical

Address: 7881 Sandholdt Road

City: Moss Landing

State_or_Province: CA

Postal_Code: 95039

Contact_Voice_Telephone: (831) 633-2461

Browse_Graphic:

Browse_Graphic_File_Name: MLHarbor_2000

Browse_Graphic_File_Description: Sample distribution with bathymetry and coastline for reference

Browse_Graphic_File_Type: .jpg

Data_Set_Credit:

Patrick McLaren at GeoSea Consulting, LTD for the collection and analysis of the data. For usSEABED: Jane Reid, formatting; Jane Reid and Chris Jenkins, formatting corrections.

Native_Data_Set_Environment:

Tkme: Another editor for formal metadata by Peter N. Schweitzer (U.S. Geological Survey, Reston, VA 22092), version 2.9.13, Microsoft Windows Version 5.1; Microsoft Word 2000 9.0

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

No estimation for grainsize accuracy is given in the original report. For usSEABED, digital location data were converted from UTM X-Y coordinates into decimal degrees. For numeric data, where appropriate, data were tested for completeness using MS Excel. Locations checked using GIS.

Logical_Consistency_Report: Data fall within normal ranges for data types given.

Completeness_Report:

All data is included in usSEABED, including hard bottom and kelp.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Navigation by differential GPS, with typical accuracy of +/- 5 meters.

Lineage:

Process_Step:

Process_Description:

Sediment grab samples were collected from September 3 to 26, 1999, using GeoSea, a 50 foot steel motor-sailor equipped with a hydraulic winch and Shipek grab sampler. This grab sampler enables the top 10 to 15 cm of sediment to be sampled. Many of the harbor samples, including shallow and intertidal samples were collected with a 12-foot, hard-bottom inflatable speedboat (Caribe) equipped with a depth sounder, a small electric winch, and a portable grab sampler. Positioning was achieved on both vessels with a hand held Differential GPS (Garmin GPS75 and Garmin GBR21), providing a typical accuracy of ±5.0 m. In most instances, samples were obtained at predetermined locations ; however, where shoreline structures (docks and marinas) interfered with navigation, a sample was collected as close as practical to the planned position. Representative samples from each successful grab were stored in plastic bags and transported to the GeoSea laboratory in Brentwood Bay, BC, for grain-size analysis. In addition, a second sample was collected out of each grab and refrigerated for later contaminant analysis. Samples were collected on a regular, hexagonal grid with a spacing of 200 m over the canyon (Area A). The remaining area (Area B) was sampled at a spacing of 500 m. A total of 639 sample sites were visited, of which 6 were unsuccessful. Failures were in water depths of greater 250 m and it is believed that sampling difficulties (i.e., currents and dragging the grab) increased with increasing depth. The failure to obtain the sample in these conditions was not the result of a rocky bottom, despite several drops of the sampler. All samples were analyzed for their complete grain-size distribution using a Malvern 2600L laser particle sizer. Prior to every analysis, the laser beam is aligned and a background measurement of the suspension medium is taken. Samples are initially well mixed before obtaining a representative sub-sample for analysis. The amount of sediment required is about 2 to 4 grams for sands and 0.5 to 1 gram for silt and clay. Samples are introduced into the water-bath of the Malvern by wet sieving through a 1mm mesh, eliminating possible blockage of the pumping mechanism by particles that are too large. If material remains on the 1mm sieve then the weight percent for each of the coarse sizes (-2.0 phi to 0.5 phi; 4.0mm to 0.7mm) is obtained by dry sieving at 0.5 phi intervals. Disaggregation of the sample is achieved by both mechanical stirring and mild ultrasonic dispersion in the water-bath. Two separate sub-samples are analyzed and the results averaged. Samples are usually analyzed using two lenses; the 100mm lens (range 0.19mm to 0.5 microns; 2.5 phi to 11 phi) and the 1000mm lens (range 1.88mm to 5 microns; -0.91 phi to 7.6 phi). Sieving is carried out at half-phi intervals from -2.0 phi to 0.5 phi. The weights are normalized and the percentage smaller than 0.5 phi is used to renormalize the Malvern values using the methods described above. The portion of the lens data above 0.5 phi is removed and replaced with sieve data.

Source_Used_Citation_Abbreviation: Method described in appendix III of the report (CD-ROM).

Process_Date: 1999

Source_Produced_Citation_Abbreviation: MLHarbor_2000

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: GeoSea Consulting, LTD

Contact_Address:

Address_Type: Mail

Address: 789 Saunders Lane

City: Brentwood Bay

State_or_Province: BC

Postal_Code: V8M 1C5

Contact_Voice_Telephone: 250-652-1334

Contact_Electronic_Mail_Address: www.geosea.ca

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Point_and_Vector_Object_Count: 639

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.00001

Longitude_Resolution: 0.00001

Geographic_Coordinate_Units: Decimal degrees

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Point

Entity_Type_Definition: SDTS point

Entity_Type_Definition_Source: Source report

Attribute:

Attribute_Label: Gravel

Attribute_Definition: Gravel

Attribute_Definition_Source: GeoSEA Consulting LTD, 2000

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 40.7

Attribute_Units_of_Measure: Percent

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: Sand

Attribute_Definition: Sand

Attribute_Definition_Source: GeoSEA Consulting LTD, 2000

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 99.9

Attribute_Units_of_Measure: Percent

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: Mud

Attribute_Definition: Mud

Attribute_Definition_Source: GeoSEA Consulting LTD, 2000

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 99.9

Attribute_Units_of_Measure: Percent

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: Mean

Attribute_Definition: Mean grain size (1st moment measure)

Attribute_Definition_Source: GeoSEA Consulting LTD, 2000

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.045

Range_Domain_Maximum: 7.409

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: Std. Dev.

Attribute_Definition:

Standard deviation of grain size distribution (sorting; 2nd moment measure)

Attribute_Definition_Source: GeoSEA Consulting LTD, 2000

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.489

Range_Domain_Maximum: 3.533

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: Skew.

Attribute_Definition: Skewness of grain size distribution (3rd moment measure)

Attribute_Definition_Source: GeoSEA Consulting LTD, 2001

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -1.178

Range_Domain_Maximum: 2.648

Attribute_Units_of_Measure: Phi

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: Folk code

Attribute_Definition: Classification of sediment on gravel-sand-mud ternary

Attribute_Definition_Source: Folk, Andrews and Lewis, 1970

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: GmS

Enumerated_Domain_Value_Definition: Gravelly muddy sand

Enumerated_Domain_Value_Definition_Source: Folk, Andrews and Lewis, 1970

Enumerated_Domain:

Enumerated_Domain_Value: GS

Enumerated_Domain_Value_Definition: Gravelly sand

Enumerated_Domain_Value_Definition_Source: Folk, Andrews and Lewis, 1970

Enumerated_Domain:

Enumerated_Domain_Value: M

Enumerated_Domain_Value_Definition: Mud

Enumerated_Domain_Value_Definition_Source: Folk, Andrews and Lewis, 1970

Enumerated_Domain:

Enumerated_Domain_Value: MS

Enumerated_Domain_Value_Definition: Muddy sand

Enumerated_Domain_Value_Definition_Source: Folk, Andrews and Lewis, 1970

Enumerated_Domain:

Enumerated_Domain_Value: SG

Enumerated_Domain_Value_Definition: Sandy gravel

Enumerated_Domain_Value_Definition_Source: Folk, Andrews and Lewis, 1970

Enumerated_Domain:

Enumerated_Domain_Value: SM

Enumerated_Domain_Value_Definition: Sandy mud

Enumerated_Domain_Value_Definition_Source: Folk, Andrews and Lewis, 1970

Attribute:

Attribute_Label: Phi size classes

Attribute_Definition: Grain size analysis by phi size classes

Attribute_Definition_Source: GeoSea Consulting, LTD

Attribute_Domain_Values:

Unrepresentable_Domain: Phi class analyses from -2 phi to 11 phi in 0.5 phi steps.

Attribute:

Attribute_Label: Comment

Attribute_Definition: Comment about presence of hardground

Attribute_Definition_Source: GeoSea Consulting, LTD

Attribute_Domain_Values:

Unrepresentable_Domain: Those sites that were unsampled due to hardground.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Moss Landing Harbor District

Contact_Address:

Address_Type: Mail and physical

Address: 7881 Sandholdt Road

City: Moss Landing

State_or_Province: CA

Postal_Code: 95039

Contact_Voice_Telephone: (831) 633-2461

Resource_Description: GeoSea 2000 report

Distribution_Liability:

Although this dataset has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data. Users of the data should be aware of the limitations of the data due to possible imprecision due to navigational inaccuracies, sampling and analytical techniques, and statistical limitations.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: MS Excel

Format_Information_Content: ASCII

Transfer_Size: 218 KB

Digital_Transfer_Option:

Offline_Option:

Offline_Media: CD-ROM

Recording_Format: MS Excel

Fees: Unknown

Technical_Prerequisites: CD-ROM reader; MS Excel

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2001

Metadata_Reference_Information:

Metadata_Date: 2005

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Jane A. Reid

Contact_Position: Geologist

Contact_Address:

Address_Type: Physical and mail

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: CA

Postal_Code: 95060

Contact_Voice_Telephone: 831-427-4727

Contact_Electronic_Mail_Address: jareid@usgs.gov

Contact_Instructions: Email preferred

Metadata_Standard_Name: CSDGM Version 2

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: None

Metadata_Use_Constraints:

Metadata was written by a user of the data. Any information contained in the physical report or CD-ROM is authoritative and supercedes any information given here.