Chirp sub-bottom data collected in 2019 in Whiskeytown Lake, California during USGS field activity 2018-686-FA

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Peter Dartnell
Originator: Daniel S. Brothers
Originator: Amy E. East
Originator: Jackson Currie
Originator: Pete Dal Ferro
Originator: Joshua B. Logan
Publication_Date: 20210520
Title:
Chirp sub-bottom data collected in 2019 in Whiskeytown Lake, California during USGS field activity 2018-686-FA
Geospatial_Data_Presentation_Form: seismic-reflection data in SEG-Y format
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P958Q0DX
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/P958Q0DX
Online_Linkage:
https://www.sciencebase.gov/catalog/item/605bc058d34ec5fa65e903b5
Description:
Abstract:
These metadata describe high-resolution chirp sub-bottom data collected in May 2019 in Whiskeytown Lake, California. Data were collected and processed by the the U.S. Geological Survey (USGS), Pacific Coastal and Marine Science Center (PCMSC) with fieldwork activity number 2018-686-FA. The chirp sub-bottom data are provided in SEG-Y format.
Purpose:
High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey Pacific Coastal and Marine Science Center in May of 2019 in Whiskeytown Reservoir, California using an Edgetech SB-512i sub-bottom profiler. These data were collected to measure possible debris flows into the lake during the 2018-2019 rainy season following the July-August 2018 Carr fire that burned vegetation around the entire lake. Post-fire hillslope sediment yields are commonly substantially greater than pre-fire yields, but the degree to which they increase can vary substantially. Effects of wildfire on sediment yield have important implications for hazards (debris-flow risk), ecosystem disturbance and recovery, and downstream water resources (storage capacity in lakes, as well as water quality). These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify bathymetric features. These data are not intended to be used for navigation.
Supplemental_Information:
Additional information about the field activity from which these data were derived is available online at:
http://cmgds.marine.usgs.gov/fan_info.php?fan=2018-686-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:
Single_Date/Time:
Calendar_Date: 20190515
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: -122.595
East_Bounding_Coordinate: -122.522
North_Bounding_Coordinate: 40.653
South_Bounding_Coordinate: 40.597
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Substrate
Theme_Keyword: Distributions
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sub-bottom profiling
Theme_Keyword: geospatial datasets
Theme_Keyword: marine geophysics
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seismic reflection profiling
Theme_Keyword: lake bed
Theme_Keyword: acoustic methods
Theme_Keyword: mapping
Theme_Keyword: geophysics
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:80336e98-7562-4aa3-8246-438816d83019
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: Whiskeytown Lake
Place_Keyword: State of California
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. This information is not intended for navigation purposes.
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:
https://www.sciencebase.gov/catalog/file/get/605bc058d34ec5fa65e903b5?name=2018-686-FA_Chirp_sub-bottom_map.jpg&allowOpen=true
Browse_Graphic_File_Description:
Map showing transect lines where Chirp data were collected in Whiskeytown Lake.
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment: SEG-Y rev 1
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Quality control was conducted during data acquisition and quality was assured during data processing
Logical_Consistency_Report:
No formal logical consistency tests were conducted, but quality control was conducted during acquisition.
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:
Estimated to be no less than 3 m due to total propagated uncertainties of navigation as well as data processing.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
A formal accuracy assessment of the vertical positional information in the data set has not been conducted.
Lineage:
Process_Step:
Process_Description:
Chirp sub-bottom data were collected using an Edgetech-512i sub-bottom profiler and converted to envelope format. Sub-bottom tow fish depth is stored in header byte 49 with an elevation scalar of -1000 (header byte 69). Navigation was converted from seconds of arc to UTM zone 10N and stored unscaled in header bytes 81 and 85.
Process_Date: 2019
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Horizontal X and Y locations for each seismic profile location are stored unscaled in the SEG-Y data trace headers in header bytes 81 and 85.
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: WGS 1984 UTM Zone 10N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.0001
Ordinate_Resolution: 0.0001
Planar_Distance_Units: Meter
Geodetic_Model:
Horizontal_Datum_Name: D WGS 1984
Ellipsoid_Name: WGS 1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: local surface
Depth_Resolution: 0.1
Depth_Distance_Units: two-way travel time
Depth_Encoding_Method: attribute values
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: Seismic shots with time stamp in standard SEG-Y file format
Entity_and_Attribute_Detail_Citation:
Society of Exploration Geophysicists (SEG) Technical Standards, available for download at http://seg.org/Publications/SEG-Technical-Standards
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - ScienceBase
Contact_Address:
Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
Zip file (2018-686-FA_Chirp_sub-bottom_SEGY.zip) containing chirp sub-bottom (SEG-Y) data collected during USGS field activity 2019-686-FA, accompanied by FGDC-compliant CMGDS metadata and a location map of transect lines. The data are divided up and presented by navigation line, as reflected in the individual file names. Chirp file sizes are limited to 200 MB so there may be several line parts per navigation line.
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: SEG-Y
Format_Version_Number: SEG-Y rev 1
Format_Information_Content:
Zip files contains the processed seismic data per navigation line and are divided based on geographic location.
File_Decompression_Technique:
Winzip, 7-zip, or Winrar are free software that will open .zip files
Transfer_Size: 348.6
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://www.sciencebase.gov/catalog/file/get/605bc058d34ec5fa65e903b5
Network_Resource_Name: https://doi.org/10.5066/P958Q0DX
Access_Instructions:
Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of all chirp data. The second link points to the landing page for the entire data release with the chirp data, metadata, and map.
Fees: None.
Technical_Prerequisites:
Use of SEG-Y data requires specialized software, such as Reveal by Shearwater Geophysical; ProMax and Seisworks by Landmark Geophysical; FOCUS and SeisX by Paradigm Geophysical; SPW by Parallel Geoscience; VISTA by Seismic Image Software; SeiSee by Dalmorneftegeophysica (DMNG); amongst others.
Metadata_Reference_Information:
Metadata_Date: 20210520
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
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P958Q0DX/2018-686-FA_Chirp_sub-bottom_metadata.html>
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