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

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Metadata:


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.


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