Monthly bedload estimates, Elwha River, Washington, October 2015 to September 2016

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Frequently anticipated questions:

What does this data set describe?

Title:
Monthly bedload estimates, Elwha River, Washington, October 2015 to September 2016
Abstract:
Bedload sediment transport was calculated on the Elwha River, Washington to measure the amount of sediment transported along the riverbed during the 2016 water year. Bedload was measured using the Elwha bedload impact plate system (Hilldale and others, 2015). Physical bedload sampling by the U.S. Bureau of Reclamation for system calibration took place during November, 2012; March, May, and June 2013; and April 2014 at the Diversion Weir gauge (Magirl and others, 2015). Early in water year 2016 (year 5) the river formed an avulsion channel across the floodplain on river left, preventing a complete measurement of bedload passing the Diversion Weir gauge. As a result, bedload for water year 2016 (year 5 of the larger study) was estimated using a discharge rating curve to obtain monthly values.
  1. How might this data set be cited?
    Hilldale, Robert C, 2018, Monthly bedload estimates, Elwha River, Washington, October 2015 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, Christopher A, Magirl, Christopher S, Bountry, Jennifer A, Hilldale, Robert C, Randle, Timothy J, and Duda, Jefferey J, 2018, 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, CA.

    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: Oct-2015
    Ending_Date: Sep-2016
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: comma-delimited text
  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_MonthlyBedloads_WY2016.csv
    Monthly bedload calculations from the Elwha River for water year (WY) 2016 (Source: Producer defined)
    Date
    Month and year of measurement, in "YYYY Mon" format (Source: Producer defined)
    Range of values
    Minimum:2015 Oct
    Maximum:2016 Sep
    monthly BL > 16mm (tonnes)
    Bedload measurement for specified month, in tonnes. (Source: Producer defined)
    Range of values
    Minimum:0.192629228
    Maximum:29771.48251 Attribute_Units_of_Measure: tonnes

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Robert C Hilldale
  2. Who also contributed to the data set?
    Data collection was funded by the U.S. Bureau of Reclamation
  3. To whom should users address questions about the data?
    Robert C Hilldale
    U.S. Bureau of Reclamation, Technical Service Center, Sedimentation and River Hydraulics
    6th and Kipling, Building 67
    Denver, CO
    United States of America

    303-445-3135 (voice)
    rhilldale@usbr.gov

Why was the data set created?

Data were obtained to assess the morphodynamic and sediment budget responses following the removal of two dams in the Elwha River. 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 topographic features.

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: 2017 (process 1 of 3)
    Bedload sediment transport was calculated using the Elwha bedload impact plate system (Hilldale and others, 2015). Physical bedload sampling for system calibration took place during November, 2012; March, May, and June 2013; and April 2014 at the Diversion Weir gauge (Magirl and others, 2015). Early in water year 2016 (year 5) the river formed an avulsion channel across the floodplain on river left, preventing a complete measurement of bedload passing the Diversion Weir gauge. As a result, bedload for water year 2016 (year 5) was estimated using a discharge rating curve to obtain monthly values. The formula for the discharge rating curve was: BL16 = 2.325 * 10^-7 * Q^5.644, where BL16 = bedload > 16mm in tonnes, Q = discharge at the diversion weir in ft3/s. These techniques did not capture bedload transport of particles smaller than 2 mm, which were estimated from a combination of regional and comparative studies in high-sediment load rivers--including other dam removal studies--using constant ratios of measured bedload to total sediment discharge estimate of 25 percent.
    Date: 14-Mar-2018 (process 2 of 3)
    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: 19-Oct-2020 (process 3 of 3)
    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?
    Hilldale, Robert C., Carpenter, Wayne O., Goodwiller, Bradley, Chambers, James P., and Randle, Timothy J., 2015, Installation of Impact Plates to Continuously Measure Bed Load: Elwha River, Washington, USA.: Journal of Hydraulic Engineering, 141(3), online.

    Online Links:

    Magirl, Christopher S., Hilldale, Robert C., Curran, Christopher A., Duda, Jeffrey J., Straub, Timothy D., Domanski, Marian, and Foreman, James R., 2015, Large-scale dam removal on the Elwha River, Washington, USA: Fluvial sediment load: Geomorphology, v. 246, p. 669-686, http://www.sciencedirect.com.

    Online Links:

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

  1. How well have the observations been checked?
    Data values fall within expected ranges
  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 carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    Data values 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 and the U.S. Bureau of Reclamation 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

    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_MonthlyBedloads_WY2016.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:
Robert C Hilldale
U.S. Bureau of Reclamation, Technical Service Center, Sedimentation and River Hydraulics
6th and Kipling, Building 67
Denver, CO
United States of America

303-445-3135 (voice)
rhilldale@usbr.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_MonthlyBedloads_WY2016.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:17:20 2021