Sediment grain size in the Elwha River estuary, Washington, from 2013 and 2014.

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What does this data set describe?

Title:
Sediment grain size in the Elwha River estuary, Washington, from 2013 and 2014.
Abstract:
This portion of the data release presents sediment grain-size data from samples collected in the Elwha River estuary, Washington, in July 2013 and June 2014 (USGS Field Activities L-15-13-PS and 2014-628-FA). Surface sediment was collected from one location in 2013 and five locations in 2014 using a using a push core. The locations of grab samples were determined with a hand-held global positioning system (GPS). The cores were split into one- to three-centimeter sections. The grain-size distributions of samples were determined using standard techniques developed by the USGS Pacific Coastal and Marine Science Center sediment lab. Size fractions are defined as gravel (greater than 2 mm), sand (63 micron to 2 mm), silt (4 micron to 63 micron), clay (less than 4 micron), and mud (less than 63 micron). The grain-size data are provided in a comma-delimited spreadsheet (.csv).
Supplemental_Information:
Additional information about the field activities from which these data were derived are available online at:
http://compass.er.usgs.gov/fan_info.php?fan=L1513PS http://cmgds.marine.usgs.gov/fan_info.php?fan=2014-628-FA
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?
    Foley, Melissa M., 2017, Sediment grain size in the Elwha River estuary, Washington, from 2013 and 2014.: data release DOI:10.5066/F75B00N4, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Foley, Melissa M., Shafroth, Patrick B., Beirne, Matthew M., Paradis, Rebecca, and Ritchie, Andrew C., 2017, Ecological parameters in the Elwha River estuary before and during dam removal: data release DOI:10.5066/F75B00N4, 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: -123.56768
    East_Bounding_Coordinate: -123.56135
    North_Bounding_Coordinate: 48.14790
    South_Bounding_Coordinate: 48.13583
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 01-Jul-2013
    Ending_Date: 10-Jun-2014
    Currentness_Reference:
    ground condition at time data were collected
  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?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (28)
    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 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is WGS_1984.
      The ellipsoid used is WGS_1984.
      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?
    Grain-size
    Tabular data (Source: Producer defined)
    Field Activity Number
    Unique U.S. Geological Survey field activity identifier (Source: producer defined) Unique identifier for the U.S. Geological Survey field activity
    Sample ID
    Name of sample (Source: producer defined) Unique identifier for the sample given when collected in the field
    Latitude (deg. N)
    Latitude of sample in decimal degrees, north (Source: producer defined)
    Range of values
    Minimum:48.13583
    Maximum:48.14790
    Units:decimal degrees
    Longitude (deg. E)
    Longitude of sample in decimal degrees, east (Source: producer defined)
    Range of values
    Minimum:-123.56135
    Maximum:-123.56768
    Units:decimal degrees
    Date Collected
    Date of sample collection in mm/dd/yyyy format (Source: producer defined)
    Range of values
    Minimum:07/01/2013
    Maximum:06/10/2014
    Units:Dates in mm/dd/yyyy format
    Time (GMT)
    Time of sample collection in HH:SS format relative to Greenwich Mean Time (GMT). (Source: producer defined)
    Range of values
    Minimum:15:35
    Maximum:20:10
    Units:Times in HH:SS format
    Core section
    Section of core analyzed (Source: producer defined)
    Range of values
    Minimum:0-1
    Maximum:42-44
    Units:centimeters from the top of the core
    Sample Type
    Type of sample collected (Source: producer defined)
    ValueDefinition
    Push coreSample collected with push core
    Lab ID
    Samples collected in 2013 are identified at FFFFFFF_XX, where FFFFFFF is the 7-digis field activity number (FAN) ID code, and XX is a sequential number given to the sample in the lab. Samples collected in 2014 are identified as PP-YY-FFFFF-XX, where PP is the 2-digit year the sample was analyzed (for example 16=2016), YY is the 2-digit year the sample was collected, FFFFF is the last 5-digits of the field activity number ID code, and XX is a sequential number given to the sample in the lab. (Source: Producer defined) Unique identifier for the sample given during analysis in the lab
    Wt. percent in -2.00 phi bin
    Weight percent of sample with grain diameter greater than -2.00. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in -1.00 phi bin
    Weight percent of sample with grain diameter between -2.00 and -1.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in -0.75 phi bin
    Weight percent of sample with grain diameter between -1.00 and -0.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in -0.50 phi bin
    Weight percent of sample with grain diameter between -0.75 and -0.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in -0.25 phi bin
    Weight percent of sample with grain diameter between -0.50 and -0.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 0.00 phi bin
    Weight percent of sample with grain diameter between -0.25 and 0.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 0.25 phi bin
    Weight percent of sample with grain diameter between 0.00 and 0.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 0.50 phi bin
    Weight percent of sample with grain diameter between 0.25 and 0.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 0.75 phi bin
    Weight percent of sample with grain diameter between 0.50 and 0.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 1.00 phi bin
    Weight percent of sample with grain diameter between 0.75 and 1.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 1.25 phi bin
    Weight percent of sample with grain diameter between 1.00 and 1.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 1.50 phi bin
    Weight percent of sample with grain diameter between 1.25 and 1.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 1.75 phi bin
    Weight percent of sample with grain diameter between 1.50 and 1.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 2.00 phi bin
    Weight percent of sample with grain diameter between 1.75 and 2.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 2.25 phi bin
    Weight percent of sample with grain diameter between 2.00 and 2.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 2.50 phi bin
    Weight percent of sample with grain diameter between 2.25 and 2.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 2.75 phi bin
    Weight percent of sample with grain diameter between 2.50 and 2.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 3.00 phi bin
    Weight percent of sample with grain diameter between 2.75 and 3.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 3.25 phi bin
    Weight percent of sample with grain diameter between 3.00 and 3.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 3.50 phi bin
    Weight percent of sample with grain diameter between 3.25 and 3.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 3.75 phi bin
    Weight percent of sample with grain diameter between 3.50 and 3.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 4.00 phi bin
    Weight percent of sample with grain diameter between 3.75 and 4.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 4.25 phi bin
    Weight percent of sample with grain diameter between 4.00 and 4.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 4.50 phi bin
    Weight percent of sample with grain diameter between 4.25 and 4.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 4.75 phi bin
    Weight percent of sample with grain diameter between 4.50 and 4.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 5.00 phi bin
    Weight percent of sample with grain diameter between 4.75 and 5.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 5.25 phi bin
    Weight percent of sample with grain diameter between 5.00 and 5.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 5.50 phi bin
    Weight percent of sample with grain diameter between 5.25 and 5.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 5.75 phi bin
    Weight percent of sample with grain diameter between 5.50 and 5.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 6.00 phi bin
    Weight percent of sample with grain diameter between 5.75 and 6.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 6.25 phi bin
    Weight percent of sample with grain diameter between 6.00 and 6.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 6.50 phi bin
    Weight percent of sample with grain diameter between 6.25 and 6.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 6.75 phi bin
    Weight percent of sample with grain diameter between 6.50 and 6.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 7.00 phi bin
    Weight percent of sample with grain diameter between 6.75 and 7.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 7.25 phi bin
    Weight percent of sample with grain diameter between 7.00 and 7.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 7.50 phi bin
    Weight percent of sample with grain diameter between 7.25 and 7.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 7.75 phi bin
    Weight percent of sample with grain diameter between 7.50 and 7.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 8.00 phi bin
    Weight percent of sample with grain diameter between 7.75 and 8.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 8.25 phi bin
    Weight percent of sample with grain diameter between 8.00 and 8.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 8.50 phi bin
    Weight percent of sample with grain diameter between 8.25 and 8.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 8.75 phi bin
    Weight percent of sample with grain diameter between 8.50 and 8.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 9.00 phi bin
    Weight percent of sample with grain diameter between 8.75 and 9.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 9.25 phi bin
    Weight percent of sample with grain diameter between 9.00 and 9.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 9.50 phi bin
    Weight percent of sample with grain diameter between 9.25 and 9.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 9.75 phi bin
    Weight percent of sample with grain diameter between 9.50 and 9.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 10.00 phi bin
    Weight percent of sample with grain diameter between 9.75 and 10.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 10.25 phi bin
    Weight percent of sample with grain diameter between 10.00 and 10.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 10.50 phi bin
    Weight percent of sample with grain diameter between 10.25 and 10.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 10.75 phi bin
    Weight percent of sample with grain diameter between 10.50 and 10.75 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 11.00 phi bin
    Weight percent of sample with grain diameter between 10.75 and 11.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 11.25 phi bin
    Weight percent of sample with grain diameter between 11.00 and 11.25 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 11.50 phi bin
    Weight percent of sample with grain diameter between 11.25 and 11.50 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 12.00 phi bin
    Weight percent of sample with grain diameter between 11.50 and 12.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Wt. percent in 13.00 phi bin
    Weight percent of sample with grain diameter between 12.00 and 13.00 phi. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Percent Gravel
    Percent of sample greater than 2 mm. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Percent Sand
    Percent of sample less than 2 mm and greater than 63 microns. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Percent Silt
    Percent of sample less than 63 microns and greater than 4 microns. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Percent Clay
    Percent of sample less than 4 microns. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    Percent Mud
    Percent of sample less than 63 microns. (Source: producer defined)
    Range of values
    Minimum:0
    Maximum:100
    Units:percentage
    Resolution:1.0E-6
    D5 Phi
    Phi size at D5 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    D10 Phi
    Phi size at D10 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    D16 Phi
    Phi size at D16 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    D25 Phi
    Phi size at D25 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    D50 Phi
    Phi size at D50 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    D75 Phi
    Phi size at D75 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    D84 Phi
    Phi size at D84 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    D90 Phi
    Phi size at D90 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    D95 Phi
    Phi size at D95 for sample. (Source: producer defined)
    Range of values
    Minimum:-4
    Maximum:13
    Units:Phi size
    Resolution:1.0E-3
    F-W Median
    Phi size median for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:3.235832
    Maximum:7.202429
    Units:Phi size
    Resolution:1.0E-6
    F-W Mean
    Phi size mean for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:3.899815
    Maximum:7.352718
    Units:Phi size
    Resolution:1.0E-6
    F-W Sorting
    Sorting for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:1.270643
    Maximum:2.467434
    Units:Phi size
    Resolution:1.0E-6
    F-W Skewness
    Skewness for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:-0.296635
    Maximum:0.581995
    Units:Phi size
    Resolution:1.0E-6
    F-W Kurtosis
    Kurtosis for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:0.887895
    Maximum:1.603556
    Units:Phi size
    Resolution:1.0E-6
    Inman Median
    Phi size median for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:3.23832
    Maximum:7.202429
    Units:Phi size
    Resolution:1.0E-6
    Inman Mean
    Phi size mean for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:4.231806
    Maximum:7.427862
    Units:Phi size
    Resolution:1.0E-6
    Inman Sorting
    Sorting for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:1.214712
    Maximum:2.41976
    Units:Phi size
    Resolution:1.0E-6
    Inman Skew 16-84
    Skewness for sample (D16-84) by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:-0.217451
    Maximum:0.56562
    Units:Phi size
    Resolution:1.0E-6
    Inman Skewness 05-95
    Skewness for sample (D5-D95) by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:-0.823404
    Maximum:1.065633
    Units:Phi size
    Resolution:1.0E-6
    Inman Kurtosis
    Kurtosis for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:0.561406
    Maximum:1.190959
    Units:Phi size
    Resolution:1.0E-6
    Trask Median
    Median for sample by Trask (1930) method. (Source: producer defined)
    Range of values
    Minimum:0.00679
    Maximum:0.106149
    Units:Phi size
    Resolution:1.0E-6
    Trask Mean
    MEan for sample by Trask (1930) method. (Source: producer defined)
    Range of values
    Minimum:0.007343
    Maximum:0.099793
    Units:Phi size
    Resolution:1.0E-6
    Trask Sorting
    Sorting for sample by Trask (1930) method. (Source: producer defined)
    Range of values
    Minimum:1.734801
    Maximum:3.243552
    Units:Phi size
    Resolution:1.0E-6
    Trask Skewness
    Skewness for sample by Trask (1930) method. (Source: producer defined)
    Range of values
    Minimum:0.499144
    Maximum:1.274804
    Units:Phi size
    Resolution:1.0E-6
    Trask Kurtosis
    Kurtosis for sample by Trask (1930) method. (Source: producer defined)
    Range of values
    Minimum:0.02603
    Maximum:0.291524
    Units:Phi size
    Resolution:1.0E-6
    Mean Phi
    Moment 1 measure of mean in phi (Source: producer defined)
    Range of values
    Minimum:3.926387
    Maximum:7.389967
    Units:Phi size
    Resolution:1.0E-6
    Mean mm
    Moment 1 measure of mean in mm (Source: producer defined)
    Range of values
    Minimum:0.005962
    Maximum:0.065772
    Units:millimeter
    Resolution:1.0E-6
    Variance Phi
    Moment 2 measure of variance (Source: producer defined)
    Range of values
    Minimum:1.63064
    Maximum:6.640921
    Units:Phi size
    Resolution:1.0E-6
    Std. Dev. Phi
    Standard deviation (Source: producer defined)
    Range of values
    Minimum:1.276965
    Maximum:2.576998
    Units:Phi size
    Resolution:1.0E-6
    Skewness Phi
    Moment 3 measure of skewness (Source: producer defined)
    Range of values
    Minimum:-1.005589
    Maximum:1.478336
    Units:Phi size
    Resolution:1.0E-6
    Kurtosis Phi
    Moment 4 measure of kurtosis (Source: producer defined)
    Range of values
    Minimum:2.581778
    Maximum:4.598639
    Units:Phi size
    Resolution:1.0E-6
    Entity_and_Attribute_Overview: The first line of the csv file is a header line.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Melissa M. Foley
  2. Who also contributed to the data set?
    Angela Tam, Michael Torresan
  3. To whom should users address questions about the data?
    Jonathan Warrick
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Research Geologist
    2885 Mission Street
    Santa Cruz, CA

    831-460-7569 (voice)
    831-427-4748 (FAX)
    jwarrick@usgs.gov

Why was the data set created?

Data were obtained to assess the ecosystem response following the removal of two dams on the Elwha River between 2011 and 2014.

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: 01-Jul-2013 (process 1 of 4)
    Sediment was collected at one location in 2013 using a push core. A hand-held global positioning system was used to determine the location of the sampling location.
    Date: 04-Feb-2014 (process 2 of 4)
    The grain-size distributions of samples were determined in the USGS Pacific Coastal and Marine Science Center sediment lab. Approximately 20 g of sediment was sub-sampled and 10 mL of 35 percent hydrogen peroxide was added to remove organic material in the sample. The sample was heated at 250 degrees C to remove any remaining hydrogen peroxide and was placed in an ultrasonic bath to liberate the fine fraction. Subsequently, the sample was centrifuged for 1.5 hours to remove soluble salts. Samples were funneled through 2 mm and 63 um sieves to separate the gravel (greater than 2 mm), sand (63 um to 2 mm), and mud (less than 63 um). The sand and gravel fractions were dried in an 80 degree C oven and weighed. Five mL of sodium hexametaphosphate was added to the mud fraction and a 20 mL aliquot was taken from a 1 L graduated cylinder to determine the weight of the mud. The particle-size distribution of the mud and sand fractions was analyzed separately using a Beckman Coulter LS 13 320, and the gravel, sand, and mud results were integrated into a single grain-size distribution for each sample.
    Date: 09-Jun-2014 (process 3 of 4)
    Sediment was collected at five locations in 2014 using a push core. A hand-held global positioning system was used to determine the location of the sampling locations.
    Date: 18-Nov-2016 (process 4 of 4)
    The grain-size distributions of samples were determined in the USGS Pacific Coastal and Marine Science Center sediment lab. Approximately 20 g of sediment was sub-sampled and 10 mL of 35 percent hydrogen peroxide was added to remove organic material in the sample. The sample was heated at 250 degrees C to remove any remaining hydrogen peroxide and was placed in an ultrasonic bath to liberate the fine fraction. Subsequently, the sample was centrifuged for 1.5 hours to remove soluble salts. Samples were funneled through 2 mm and 63 um sieves to separate the gravel (greater than 2 mm), sand (63 um to 2 mm), and mud (less than 63 um). The sand and gravel fractions were dried in an 80 degree C oven and weighed. Five mL of sodium hexametaphosphate was added to the mud fraction and a 20 mL aliquot was taken from a 1 L graduated cylinder to determine the weight of the mud. The particle-size distribution of the mud and sand fractions was analyzed separately using a Beckman Coulter LS 13 320, and the gravel, sand, and mud results were integrated into a single grain-size distribution for each sample.
  3. What similar or related data should the user be aware of?
    Foley, Melissa M., Warrick, Jonathan A., Ritchie, Andrew C., Stevens, Andrew W., Shafroth, Patrick B., Duda, Jeffrey J., Beirne, Matthew M., Paradis, Rebecca, Gelfenbaum, Guy R., McCoy, Randall, and Cubley, Erin S., 2017, Coastal habitat and biological community response to dam removal on the Elwha River: Ecological Monographs, Ecological Society of America, Washington DC.

    Online Links:

    Folk, Robert Louis, and Ward, William C., 1957, Brazos River bar; a study in the significance of grain size parameters.

    Online Links:

    Inman, Douglas Lamar, 1952, Measures for describing the size distribution of sediments.

    Online Links:

    Trask, Parker D., 1930, Mechanical analyses of sediments by centrifuge.

    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?
    A formal accuracy assessment of the horizontal positional information in the data set has not been conducted.
  3. How accurate are the heights or depths?
  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 rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical 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 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? Grain-size data are presented as a comma-delimited file (.csv) along with 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?

Who wrote the metadata?

Dates:
Last modified: 10-Jul-2017
Metadata author:
Jonathan Warrick
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Research Geologist
2885 Mission Street
Santa Cruz, CA
United States of America

831-460-7569 (voice)
jwarrick@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/westcoast/washington/elwha/Elwha_estuary_grainsize_2013-2014_metadata.faq.html>
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