Hydrodynamic and sediment transport data from San Pablo Bay (northern San Francisco Bay), 2011-2012

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Frequently anticipated questions:

What does this data set describe?

Title:
Hydrodynamic and sediment transport data from San Pablo Bay (northern San Francisco Bay), 2011-2012
Abstract:
The U.S. Geological Survey Pacific Coastal and Marine Science Center collected data to investigate sediment dynamics in the shallows of San Pablo Bay in two deployments: February to March 2011 (ITX11) and May to June 2012 (ITX12). This data release includes time-series data and grain-size distributions from sediment grabs collected during the deployments. During each deployment, time series of current velocity, water depth, and turbidity were collected at several stations in the shallows, and one station in the channel. Velocity and depth (pressure) were collected at high frequency (10 Hz) to allow calculation of wave parameters and turbulence statistics.
Supplemental_Information:
Information about the data collection field activities can be found at: https://cmgds.marine.usgs.gov/fan_info.php?fan=ID111SF https://cmgds.marine.usgs.gov/fan_info.php?fan=ID212SF
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  1. How might this data set be cited?
    Ferreira, Joanne C.T., Dailey, Evan T., MacVean, Lissa J., and Lacy, Jessica R., 2019, Hydrodynamic and sediment transport data from San Pablo Bay (northern San Francisco Bay), 2011-2012: data release DOI:10.5066/F7WD3Z2F, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -122.411092
    East_Bounding_Coordinate: -122.361944
    North_Bounding_Coordinate: 38.130778
    South_Bounding_Coordinate: 38.037667
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/5bb66469e4b0fc368e893b43?name=ITX_StudyArea.png&allowOpen=true (PNG)
    Image map showing locations of sampling efforts
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 02-Feb-2011
    Ending_Date: 28-Jun-2012
    Currentness_Reference:
    ground condition at time data were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: NetCDF files
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set.
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 1.0E-5. Longitudes are given to the nearest 1.0E-5. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is World Geodetic System 1984 (WGS84).
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    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:
    The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Joanne C.T. Ferreira
    • Evan T. Dailey
    • Lissa J. MacVean
    • Jessica R. Lacy
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    PCMSC Science Data Coordinator
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    2885 Mission Street
    Santa Cruz, CA
    USA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

The purpose of these deployments was to investigate sediment dynamics in very shallow water, including the intertidal region, in San Francisco Bay. We are interested in what controls turbidity in shallow and intertidal regions because they serve as an important source of sediment to marshes. In addition, shallows tend to be the most turbid part of the estuary, because of wave-driven resuspension, so sediment dynamics in the shallows are an important part of the sediment budget of the estuary. These data sets provide calibration data for sediment transport models of San Francisco Bay.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 02-Feb-2011 (process 1 of 11)
    Instruments included in deployment are: RDInstruments Acoustic Doppler Current Profiler, Seabird Electronics SBE16plus CTD, Seabird Electronics SBE37SM CTD, RBR solo/duo bursting pressure sensor, Seapoint turbidity meter, Sontek single point acoustic doppler velocimeter, and RBR XR-420 CTD.
    Date: 17-Mar-2011 (process 2 of 11)
    Instruments were recovered.
    Date: 31-May-2012 (process 3 of 11)
    Instruments included in deployment are: RDInstruments Acoustic Doppler Current Profiler (ADCP), Seabird Electronics SBE16plus CTD, Seabird Electronics SBE37SM CTD, RBR solo/duo bursting pressure sensor, Seapoint turbidity meter, Sontek single point acoustic doppler velocimeter, and RBR XR-420 CTD.
    Date: 28-May-2012 (process 4 of 11)
    Instruments were removed from station. End of data collection.
    Date: 04-Feb-2019 (process 5 of 11)
    Data were accumulated into NetCDF files. During post-processing, bad data points were identified by the deployment and recovery times.
    Date: 04-Feb-2018 (process 6 of 11)
    Optical backscatter (OBS) data are reported without calibration to local sediments.
    Date: 05-Nov-2018 (process 7 of 11)
    Files are named with a convention that uses a 13-digit alpha-numeric code. The first three characters for this dataset are all 'ITX' for the experiment name. The fourth and fifth positions represent the calendar year in which the first data point in the file was taken (11, 2011; 12, 2012). The sixth to eight character designate the platform on which the instruments were deployed. Next is a two-digit index reflecting the position of the primary sensor of each instrument on the platform, with 01 the closest to the surface. Next is a two- or three- character code for the instrument or data type (wh, RDInstruments ADCP current data; adv, Sontek's Acoustic Doppler Velocimeter; bpr, RBR's bursting pressure sensor; ct and ctd RBR's XR-420 CTD or Seabird Electronics 16plus or 37-SM CT or CTDs).
    Date: 13-Jun-2019 (process 8 of 11)
    Corrected the field activity links in the Supplemental Information section (Susan Cochran; scochran@usgs.gov)
    Date: 20-Jun-2019 (process 9 of 11)
    Edits were made to standardize a few of the "None" keywords. Publications that use these data added to the Cross-References section. Person who carried out this activity:
    Susan A Cochran
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    2885 Mission St.
    Santa Cruz, CA
    United States

    831-460-7545 (voice)
    scochran@usgs.gov
    Date: 19-Oct-2020 (process 10 of 11)
    Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 13-Oct-2021 (process 11 of 11)
    Performed minor edits to the metadata to correct typos. No data were changed. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Susan A. Cochran
    Geologist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7545 (voice)
    scochran@usgs.gov
  3. What similar or related data should the user be aware of?
    MacVean, Lissa J., and Lacy, Jessica R., 2014, Interactions between waves, sediment, and turbulence on a shallow estuarine mudflat: Journal article Journal of Geophysical Research--Oceans, v. 119, p. 1534-1553, American Geophysical Union (AGU), online.

    Online Links:

    Lacy, Jessica R., and MacVean, Lissa J., 2016, Wave attenuation in the shallows of San Francisco Bay: Journal article Coastal Engineering, v. 114, p. 159-168, Elsevier, online.

    Online Links:

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    No formal attribute accuracy tests were conducted.
  2. How accurate are the geographic locations?
    Horizontal accuracy derived from GPS instrumentation is less than 1 m.
  3. How accurate are the heights or depths?
    There are two sources of uncertainty associated with vertical positioning of the instruments: 1) the measuring tools used during instrument mounting, 2) the amount of settling that occurs during deployment. There was no evidence that the platforms settled to a large degree. The measuring tools used to mount the instruments onto the platforms have a resolution of 1 cm resulting in an uncertainty of 2 cm.
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the metadata for each part of this data release carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    Data fall within expected ranges.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
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.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    USA

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable time-series data in NetCDF format.
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 13-Oct-2021
Metadata author:
PCMSC Science Data Coordinator
U.S. Geological Survey, Pacific Coastal and Marine Science Center
2885 Mission Street
Santa Cruz, CA
USA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_F7WD3Z2F/ITX_time-series_metadata.faq.html>
Generated by mp version 2.9.50 on Thu Oct 14 14:47:21 2021