Suspended sediment concentration data in the Elwha River, Washington, September 2011 to September 2016

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Frequently anticipated questions:

What does this data set describe?

Title:
Suspended sediment concentration data in the Elwha River, Washington, September 2011 to September 2016
Abstract:
This data release provides 15-minute data of suspended-sediment concentration and fine (less than 0.0625 mm) suspended-sediment concentration during the removal of 2 large dams on the Elwha River from September 2011 to September 2016. Data are derived from regression relations with turbidity at the USGS gaging station Elwha River at the Diversion (no.12046260).
Supplemental_Information:
The methods used and data shown for the period of Sept. 15, 2011 to Sept. 10, 2013 (Years 1 and 2) are from "Suspended-sediment concentrations during dam decommissioning in the Elwha River, Washington: U.S. Geological Survey Data Set, http://wa.water.usgs.gov/pubs/misc/elwha/ssc/ doi:10.5066/F7M043DB" and provided in this data release for maintaining the complete 5-year record and for user convenience.
  1. How might this data set be cited?
    Curran, Christopher A, Magirl, Christopher S, and Duda, Jefferey J, 2017, Suspended sediment concentration data in the Elwha River, Washington, September 2011 to September 2016: data release doi:10.5066/F7PG1QWC, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Ritchie, Andrew C., Curran, Chris, Magirl, Chris, Bountry, Jennifer, Hilldale, Rob, Randle, Tim, and Duda, Jefferey J., 2017, Data in support of 5-year sediment budget and morphodynamic analysis of Elwha River following dam removals: data release doi:10.5066/F7PG1QWC, 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: -123.601338
    East_Bounding_Coordinate: -123.548927
    North_Bounding_Coordinate: 48.151755
    South_Bounding_Coordinate: 48.001990
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 15-Sep-2011
    Ending_Date: 30-Sep-2016
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: Comma-separated values
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference:
      Data were collected at USGS gaging station 12046260, on Elwha River, northern Washington State, on the right bank 3.5 miles upstream from the river mouth (latitude: 48.11172, longitude: -123.55151).
      This is a Point data set.
    2. What coordinate system is used to represent geographic features?
  7. How does the data set describe geographic features?
    Elwha_SuspendedSedimentConcentration_2012to2016.csv
    15-minute data of suspended-sediment concentration (Source: Christopher A Curran)
    DATE
    Date in mm/dd/yyyy format (Source: Producer defined)
    Range of values
    Minimum:9/15/2011
    Maximum:9/30/2016
    TIME
    Time in hh:mm format (Source: Pacific Time Zone)
    Range of values
    Minimum:00:00
    Maximum:23:45
    TIME_ZONE
    Time zone at time of measurement, either Pacific Standard Time (PST, UTC-8) or Pacific Daylight Time (PDT, UTC-7). (Source: Pacific Time Zone)
    ValueDefinition
    PDTPacific Daylight Time (PDT, UTC-7)
    PSTPacific Standard Time (PST, UTC-8)
    SSC
    Suspended-sediment concentration; NA=no value measured (Source: Producer defined)
    Range of values
    Minimum:0
    Maximum:21372
    Units:milligrams per liter (mg/l)
    SSC_U90PI
    Upper limit of uncertainty at 90 percent prediction interval; NA= no value measured (Source: Producer defined)
    Range of values
    Minimum:0
    Maximum:31023
    Units:milligrams per liter (mg/L)
    SSC_L90PI
    Lower limit of uncertainty at 90 percent prediction interval; NA= no value measured (Source: Producer defined)
    Range of values
    Minimum:0
    Maximum:15869
    Units:milligrams per liter (mg/L)
    fSSC
    Fine suspended-sediment concentration (less than 0.0625 mm) ; NA= no value measured (Source: Producer defined)
    Range of values
    Minimum:0
    Maximum:13491
    Units:milligrams per liter (mg/L)
    fSSC_U90PI
    Upper limit of uncertainty at 90 percent prediction interval; NA= no value measured (Source: Producer defined)
    Range of values
    Minimum:0
    Maximum:19174
    Units:milligrams per liter (mg/L)
    fSSC_L90PI
    Lower limit of uncertainty at 90 percent prediction interval; NA= no value measured (Source: Producer defined)
    Range of values
    Minimum:0
    Maximum:10413
    Units:milligrams per liter (mg/L)
    Remark
    A code that, if present, indicates an external source for this data. (Source: Producer defined) The code of "A" indicates that methods used to derive this data are described in: Curran, C.A., Magirl, C.S., and Duda, J.J., 2014, Suspended-sediment concentrations during dam decommissioning in the Elwha River, Washington: U.S. Geological Survey Data Set, http://wa.water.usgs.gov/pubs/misc/elwha/ssc/, doi:10.5066/F7M043DB. No value indicates that methods are described within this data release.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Christopher A Curran
    • Christopher S Magirl
    • Jefferey J Duda
  2. Who also contributed to the data set?
    Data collection was funded by U.S. Geological Survey, Environmental Protection Agency, National Park Service, and U.S. Bureau of Reclamation
  3. To whom should users address questions about the data?
    Christopher A Curran
    U.S. Geological Survey, Washington Water Science Center
    934 Broadway
    Tacoma, WA
    United States

    253-552-1614 (voice)
    ccurran@usgs.gov

Why was the data set created?

Data were collected for the purpose of estimating the mass flux of suspended sediment in the Elwha River during and following the removal of the Glines Canyon and Elwha River dams.

How was the data set created?

  1. From what previous works were the data drawn?
    Elwha sediment web release (source 1 of 1)
    Curran, C.A., Magirl, C.S., and Duda, J.J., 2014, Suspended-sediment concentrations during dam decommissioning in the Elwha River, Washington: U.S. Geological Survey, Washington Water Science Center, Tacoma, WA.

    Online Links:

    Type_of_Source_Media: Data Set
    Source_Contribution:
    These 15-minute data represent conditions during years 1 and 2 of the 5-year period following dam removal and are appended to the time series of similar data for years 3 through 5.
  2. How were the data generated, processed, and modified?
    Date: 2017 (process 1 of 4)
    Data are derived from regression relations with turbidity at the USGS gaging station Elwha River at the Diversion (no.12046260). The exact location of the gaging station was: north latitude 48 degrees 06'44" and west longitude 123 degrees 33'03", in NE 1/4 NW 1/4 Section 10, Township 30 North, Range 7 West, in Clallam County, Hydrologic Unit 17110020, on right bank 3.5 miles upstream from mouth, 5.7 miles west of Port Angeles. Drainage area is 318 square miles. Elevation of gage is NAVD 1988. For the period of September 11, 2013 through September 30, 2016, data were generated using regression models approved by the USGS Washington Water Science Center and described in the cross references cited here.
    Date: 14-Mar-2018 (process 2 of 4)
    Corrected spelling of author’s last name in Larger Work section from Magril to Magirl. 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: 17-Jul-2018 (process 3 of 4)
    Corrected name of theme keyword thesaurus from ISO 19115 Topic Categories to Category. 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 4 of 4)
    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
  3. What similar or related data should the user be aware of?
    Curran, C.A., Magirl, C.S., and Duda, J.J., 2014, Suspended-sediment concentrations during dam decommissioning in the Elwha River, Washington: U.S. Geological Survey, Washington Water Science Center, Tacoma, WA.

    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, uncertainty bounds for individual observations are provided and based on regression models described in text files that are included with this data release.
  2. How accurate are the geographic locations?
    No formal positional accuracy tests were conducted
  3. How accurate are the heights or depths?
    No formal positional accuracy tests were conducted
  4. Where are the gaps in the data? What is missing?
    Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record and associated text documents carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    No formal positional accuracy tests were conducted

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 (USGS) as the originator 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
    United States

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? data are downloadable in .csv format (Elwha_SuspendedSedimentConcentration_2012to2016.csv) along with CMGDS FGDC-compliant metadata.
  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?
  5. What hardware or software do I need in order to use the data set?
    This dataset is presented in comma-separated values (CSV) format and can be opened with text-editing software or spreadsheet software (for example, Microsoft Excel).

Who wrote the metadata?

Dates:
Last modified: 19-Oct-2020
Metadata author:
Christopher A Curran
U.S. Geological Survey. Washington Water Science Center
Hydrologist
934 Broadway
Tacoma, Washington
United States

253-552-1614 (voice)
ccurran@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_F7PG1QWC/Elwha_SuspendedSedimentConcentration_2012to2016.faq.html>
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