Citation:
Citation_Information:
Originator: Melissa M. Foley
Originator: Jonathan A. Warrick
Publication_Date: 2017
Title:
Characterization of seafloor photographs near the mouth of the Elwha River during the first two years of dam removal (2011-2013)
Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/F7MC8XHX
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/F7MC8XHX
Online_Linkage:
Description:
Abstract:
We characterized seafloor sediment conditions near the mouth of the Elwha River from underwater photographs taken every four hours from September 2011 to December 2013. A digital camera was affixed to a tripod that was deployed in approximately 10 meters of water. Each photograph was qualitatively characterized as one of six categories: (1) base, or no sediment; (2) low sediment; (3) medium sediment; (4) high sediment; (5) turbid; or (6) kelp. For base conditions, no sediment was present on the seafloor. Low sediment conditions were characterized by a light dusting of sediment; medium sediment conditions were characterized by a layer of sediment that covered all rock surfaces but did not obscure the relief of the seafloor; high sediment conditions were characterized by a layer of sediment that covered all rock surfaces and obscured the relief of the seafloor. During turbid conditions, suspended sediment in the water column obscured the view of the seafloor, and during kelp conditions, blades of kelp covered the camera lens, blocking our view of the seafloor.
Purpose:
Data were collected to assess seafloor sediment conditions near the mouth of the Elwha River during the first two years of dam removal (September 2011 to December 2013).
Supplemental_Information:
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20110912
Ending_Date: 20131223
Currentness_Reference: ground condition at time data were collected
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -123.55931
East_Bounding_Coordinate: -123.55444
North_Bounding_Coordinate: 48.21778
South_Bounding_Coordinate: 48.15333
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:593722f6e4b0f6c2d0d89aba
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: substrate
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sedimentation
Theme_Keyword: underwater photography
Theme_Keyword: time series datasets
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: sedimentation
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: sediment
Theme_Keyword: photography
Theme_Keyword: dam removal
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Elwha River
Place_Keyword: Strait of Juan de Fuca
Place_Keyword: Olympic Peninsula
Place_Keyword: Clallam County
Place_Keyword: State of Washington
Access_Constraints: None
Use_Constraints:
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator of the dataset and in products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jonathan A. Warrick
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Position: Research Geologist
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-460-7569
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: jwarrick@usgs.gov
Data_Set_Credit:
Thanks go to the USGS Pacific Coastal and Marine Science Center Marine Facility crew for their hard work with the tripod deployments and equipment turnarounds: Henry Chezar, Robert Wyland, Thomas Reiss, Jamie Grover, Peter Dal Ferro, Jenny White, Cordell Johnson, Joanne Ferreira
Native_Data_Set_Environment:
Microsoft Excel for Mac 2011, Mac OS X Yosemite, version 10.10.5.
Cross_Reference:
Citation_Information:
Originator: Melissa M. Foley
Originator: Jonathan A. Warrick
Publication_Date: 2017
Title:
Ephemeral seafloor sedimentation during dam removal: Elwha River, Washington
Publication_Information:
Publication_Place: journal article
Publisher: Continental Shelf Research
Online_Linkage: https://doi.org/10.1016/j.csr.2017.09.005