Metadata: Identification_Information: Citation: Citation_Information: Originator: Andrew W. Stevens Originator: Gerald A. Hatcher Originator: Peter Dal Ferro Originator: Peter Dartnell Originator: Jonathan A. Warrick Originator: Nicholas Cohn Originator: Hans R. Moritz Publication_Date: 20230808 Title: Vessel-mounted acoustic Doppler current profiler (ADCP) data from the lower Columbia River, Washington and Oregon, 2021 Geospatial_Data_Presentation_Form: comma-delimited text Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/10.5066/P92U1KPY 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/P92U1KPY Larger_Work_Citation: Citation_Information: Originator: Andrew W. Stevens Originator: Gerald A. Hatcher Originator: Peter Dal Ferro Originator: Peter Dartnell Originator: Jonathan A. Warrick Originator: Nicholas Cohn Originator: Hans R. Moritz Publication_Date: 2023 Title: Digital seafloor images, sediment grain size, bathymetry, and water velocity data from the lower Columbia River, Washington and Oregon, 2021 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P92U1KPY Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested Citation: Suggested Citation: Stevens, A.W., Hatcher, G.A., Dal Ferro, P., Warrick, J.A., Cohn, N., and Moritz, H.R., 2023, Digital seafloor images, sediment grain size, bathymetry, and water velocity data from the lower Columbia River, Washington and Oregon, 2021: U.S. Geological Survey data release, https://doi.org/10.5066/P92U1KPY. Online_Linkage: https://doi.org/10.5066/P92U1KPY Description: Abstract: This dataset contains water velocity data derived from spatial surveys performed with a vessel-mounted acoustic Doppler current profiler at four sites (SKM, SLG, LDB, WLW) in the lower Columbia River, Washington and Oregon, in 2021. The data are provided in netCDF (.nc) format and compressed into .zip archives for each site. Purpose: Growth of subaqueous sand dunes commonly causes shoaling in engineered river channels that necessitates costly dredging to maintain adequate depths for navigation. The factors that result in sand wave growth are theoretically understood from laboratory experiments, but the capacity to predict sand wave geometries in field settings is limited due to temporal and spatial variability in hydrodynamics and sediment grain size. Detailed measurements of sand wave geometries, hydrodynamics, and grain size are therefore needed to test and improve numerical models and inform efficient management strategies in navigation channels. This data release presents surface sediment grain size distributions, bathymetry and seafloor acoustic backscatter, and water velocity data acquired at four sites with subaqueous sand dunes in the lower Columbia River, Washington and Oregon, between June 4 and June 9, 2021. The four sites were located between 65 km and 127 km upstream from the ocean inlet along a gradient of relative tidal and fluvial influence. The survey was performed during peak annual river discharge when sediment transport processes were likely active. High resolution digital images were collected at each site with an underwater camera system that was repeatedly lowered to the seabed along a series of 1 km-long transects oriented along the main navigation channel and spaced about 60 m apart. The grain size distributions of the seabed images were estimated using an automated image processing technique and tested with observed grain size distributions derived from manual measurements on a subset of 16 images. Swath bathymetry and seafloor acoustic backscatter data were collected repeatedly at each site using a 234.5 kHz phase-differencing sidescan sonar to characterize sand wave geometry and bathymetric change resulting from sand wave migration. Current velocity data were collected from an underway survey vessel equipped with a downward looking 600 kHz ADCP along transects oriented both along- and across the main navigation channel. Combined, these data provide a comprehensive characterization of mobile subaqueous sand dunes that can be used to improve predictions of dune growth in complicated field settings and inform efficient sediment management practices in the lower Columbia River. Supplemental_Information: Additional information about the field activity or activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-621-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20210605 Ending_Date: 20210609 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: -123.441836 East_Bounding_Coordinate: -122.760616 North_Bounding_Coordinate: 46.249934 South_Bounding_Coordinate: 45.712744 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:5cc16528-d915-4038-a022-5030dbb92794 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: Water Column Features Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: acoustic doppler current profiling Theme_Keyword: sediment transport Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: physical oceanography Theme_Keyword: currents Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Columbia River Place_Keyword: State of Washington Place_Keyword: State of Oregon 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(s) of the dataset and in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: vmadcp_example.png Browse_Graphic_File_Description: Map showing magnitude and direction of depth-averaged currents and cross-sections showing profiles of current speed and direction Browse_Graphic_File_Type: PNG Native_Data_Set_Environment: MATLAB Version: 9.13.0.2080170 (R2022b) Update 1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted. Logical_Consistency_Report: Data fall within expected ranges. Completeness_Report: Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Positioning of the water velocity measurements were achieved with an Applanix POSMV Wavemaster operating in DGNSS mode. Manufacturer reported accuracy of the horizontal positions while operating in DGNSS mode is between 0.5 and 2 m depending on the quality of the DGNSS corrections received (https://www.applanix.com/downloads/products/specs/posmv/POS-MV-WaveMaster-II.pdf). Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Depths reported in the data files are relative to the elevation of the ADCP at the time of data collection. Vertical information in this dataset is not associated with any established vertical datum. Lineage: Process_Step: Process_Description: Water velocity data were acquired at four sites with a vessel-mounted acoustic doppler current profiler (ADCP) in the lower Columbia River between June 5 and June 9, 2021. Measurements of current velocity in the water column were collected using a downward looking 600 kHz Teledyne RDI ADCP pole-mounted to the R/V Park Snavely as the vessel surveyed tracklines oriented along and across the main navigation channel. Positioning and orientation of the ADCP were measured using an Applanix POS MV 320 and recorded at 1 Hz intervals. Data acquisition and merging of the ADCP and positioning data were achieved with Teledyne RDI VMDAS software. While underway, profiles of current velocity and acoustic backscatter data were collected from 1.48 m below the transducer (approximately 2.2 m below the water surface) to the seafloor at 0.5 m intervals. Raw ADCP data were transformed to Earth coordinates in real time using heading and tilt information supplied by the POS MV. Velocity measurements were corrected to remove the motion of the vessel using the navigation data recorded by the POS MV because the bed was assumed to be mobile during the surveys. Process_Date: 20210609 Process_Step: Process_Description: Raw ADCP data were reprocessed to remove heading bias due to imprecise mounting of the instrument on the survey vessel. A heading bias correction of 8 degrees was applied to all data collected during the survey using Teledyne RDI VMDAS software. Process_Date: 20230324 Process_Step: Process_Description: Data were accumulated into NetCDF files for distribution Process_Date: 20230519 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Data were collected continuously along survey transects. Refer to self-contained NetCDF files for more location information. Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: NetCDF files are self-contained and attribute information may be found in the header of the file itself. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - CMGDS Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 1-831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Resource_Description: The current velocity data are provided in NetCDF format. The data from each site (site identifiers = SKM, SLG, LDB, WLW) are provided in separate compressed (.zip) files. The support file, vmadcp_file_list.csv, contains a list of files, data collection times, and orientations of transects contained in each zip archive. Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: NetCDF Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b) Format_Information_Content: Zip file contains vessel-mounted ADCP data from the LDB Site in NetCDF format File_Decompression_Technique: zip archive Transfer_Size: 0.724 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P92U1KPY Access_Instructions: Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Current Data section. Digital_Form: Digital_Transfer_Information: Format_Name: NetCDF Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b) Format_Information_Content: Zip file contains vessel-mounted ADCP data from the SKM Site in NetCDF format File_Decompression_Technique: zip archive Transfer_Size: 0.471 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P92U1KPY Access_Instructions: Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Current Data section. Digital_Form: Digital_Transfer_Information: Format_Name: NetCDF Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b) Format_Information_Content: Zip file contains vessel-mounted ADCP data from the SLG Site in NetCDF format File_Decompression_Technique: zip archive Transfer_Size: 0.586 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P92U1KPY Access_Instructions: Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Current Data section. Digital_Form: Digital_Transfer_Information: Format_Name: NetCDF Format_Version_Number: MATLAB Version: 9.13.0.2080170 (R2022b) Format_Information_Content: Zip file contains vessel-mounted ADCP data from the WLW Site in NetCDF format File_Decompression_Technique: zip archive Transfer_Size: 0.379 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P92U1KPY Access_Instructions: Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Current Data section. Fees: None. Metadata_Reference_Information: Metadata_Date: 20230808 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998