Grain size and bulk density from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2015 to 2017

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently anticipated questions:


What does this data set describe?

Title:
Grain size and bulk density from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2015 to 2017
Abstract:
Grain size distribution and bulk density are reported for sediment samples from two flooded agricultural tracts, Little Holland Tract and Liberty Island, in the Sacramento-San Joaquin Delta, California. Samples were repeatedly collected at 8 sites using a Ponar grab or push core samplers during 13 visits to the study area from 2015 to 2017. The long-term time series data collection stations (sites LWA, HVB, HWC, and LVB) were sampled on almost every field survey, and the remaining sites were sampled 6 or times or fewer, some only once. All samples were analyzed for grain size distribution and some were analyzed for bulk density. These data provide insight into how particle size distributions varied spatially and temporally.
Supplemental_Information:
  1. How might this data set be cited?
    Lacy, Jessica R, Dailey, Evan T, and Carlson, Emily M, 2018, Grain size and bulk density from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2015 to 2017: data release doi:10.5066/F7V1241K, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Lacy, Jessica R, Dailey, Evan T, and Carlson, Emily M, 2018, Bed sediment properties in Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2014 to 2017: data release doi:10.5066/F7V1241K, 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: -121.6739
    East_Bounding_Coordinate: -121.6579
    North_Bounding_Coordinate: 38.333489
    South_Bounding_Coordinate: 38.26705
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/5a73a6c3e4b0a9a2e9e172d3?name=LHT-LI_SampleMeans_Sites2015to2017.png&allowOpen=true (PNG)
    Image map showing average values of median grain size (excluding gravel) and ratio of sand, silt, and clay at each sampling location.
    https://www.sciencebase.gov/catalog/file/get/5a73a6c3e4b0a9a2e9e172d3?name=sand_fines_sb.png&allowOpen=true (PNG)
    Plots showing percent fines (red) and percent sand (black) in surficial sediments collected between July 2015 and Oct 2017 at four stations in Little Holland Tract and Liberty Island.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 03-Aug-2015
    Ending_Date: 03-Oct-2017
    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 in the Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California
      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?
    GrainSizeBD_LHT-LI_2015to2017.csv
    Table containing attribute information associated with the dataset (Source: Producer defined)
    FACS/FAN I.D.
    Unique U.S. Geological Survey field activity identifier. (Source: Producer defined) Unique U.S. Geological Survey field activity identifier.
    Sample I.D.
    Sample identifier (Source: Producer defined) Unique identifier for samples; assigned in the field.
    Lab I.D.
    Sample identifier for sediment lab (Source: Producer defined) Unique identifier for samples; assigned in the sediment lab.
    Date Collected
    Date in month/day/year format of sample collection. (Source: Producer defined)
    Range of values
    Minimum:08/03/2015
    Maximum:10/03/2017
    Units:Date in month/day/year format
    Time (PDT)
    Time of sample collection, in hours:minutes:seconds format, Pacific Daylight Time (PDT). (Source: Producer defined)
    Range of values
    Minimum:00:00:00
    Maximum:23:59:59
    Units:hours:minutes:seconds format, Pacific Daylight Time (PDT)
    Site
    Unique identifier of sampling locations. (Source: Producer defined) Unique identifier of sampling locations.
    Latitude
    Latitude of sample location in decimal degrees, north. (Source: Producer defined)
    Range of values
    Minimum:38.26705
    Maximum:38.33349
    Units:Decimal degrees
    Longitude
    Longitude of sample location in decimal degrees, east. (Source: Producer defined)
    Range of values
    Minimum:-121.7961
    Maximum:-121.6579
    Units:Decimal degrees
    Sample Type
    Type of sample collected (Source: Producer defined)
    ValueDefinition
    push coreSample collected with push core
    PonarSample collected with Ponar grab sampler
    ScrapeSample collected by scraping accumulated sediment off of equipment that had been previously deployed
    Core Depth
    The midpoint of the depth into the sediment bed of the sample; all sections were 1 cm thick unless noted in "Sample Notes" column (Source: Producer defined)
    ValueDefinition
    NADepth not applicable or known for sample, see "Sample Notes" column
    Range of values
    Minimum:0.5
    Maximum:7.5
    Units:centimeters
    Sample Notes
    Any relevant notes relating to sample (Source: Producer defined) Any relevant notes relating to sample
    Wt. percent in -4.00 phi bin or 16 mm bin
    Weight percent of sample with grain diameter greater than -4.00 phi, or 16 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:30.810296
    Units:percentage
    Wt. percent in -3.75 phi bin or 13.5 mm bin
    Weight percent of sample with grain diameter between -4.00 and -3.75 phi, or 13.5 and 16 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:1.99076
    Units:percentage
    Wt. percent in -3.50 phi bin or 11.2 mm bin
    Weight percent of sample with grain diameter between -3.75 and -3.50 phi, or 11.2 and 13.5 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:6.594796
    Units:percentage
    Wt. percent in -3.25 phi bin or 9.51 mm bin
    Weight percent of sample with grain diameter between -3.50 and -3.25 phi, or 9.51 and 11.2 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:0.0
    Units:percentage
    Wt. percent in -3.00 phi bin or 8 mm bin
    Weight percent of sample with grain diameter between -3.25 and -3.00 phi, or 8 and 9.51 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:16.724954
    Units:percentage
    Wt. percent in -2.75 phi bin or 6.73 mm bin
    Weight percent of sample with grain diameter between -3.00 and -2.75 phi, or 6.73 and 8 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:3.203979
    Units:percentage
    Wt. percent in -2.50 phi bin or 5.66 mm bin
    Weight percent of sample with grain diameter between -2.75 and -2.50 phi, or 5.66 and 6.73 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:5.662094
    Units:percentage
    Wt. percent in -2.25 phi bin or 4.76 mm bin
    Weight percent of sample with grain diameter between -2.50 and -2.25 phi, or 4.76 and 5.66 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:7.083848
    Units:percentage
    Wt. percent in -2.00 phi bin or 4 mm bin
    Weight percent of sample with grain diameter between -2.25 and -2.00 phi, or 4 and 4.76 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:4.024225
    Units:percentage
    Wt. percent in -1.75 phi bin or 3.36 mm bin
    Weight percent of sample with grain diameter between -2.00 and -1.75 phi, or 3.36 and 4 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.422352
    Units:percentage
    Wt. percent in -1.50 phi bin or 2.83 mm bin
    Weight percent of sample with grain diameter between -1.75 and -1.50 phi, or 2.83 and 3.36 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.388189
    Units:percentage
    Wt. percent in -1.25 phi bin or 2.38 mm bin
    Weight percent of sample with grain diameter between -1.50 and -1.25 phi, or 2.38 and 2.83 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.370384
    Units:percentage
    Wt. percent in -1.00 phi bin or 2 mm bin
    Weight percent of sample with grain diameter between -1.25 and -1.00 phi, or 2 and 2.38 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:1.791735
    Units:percentage
    Wt. percent in -0.75 phi bin or 1.68 mm bin
    Weight percent of sample with grain diameter between -1.00 and -0.75 phi, or 1.68 and 2 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.047101
    Units:percentage
    Wt. percent in -0.50 phi bin or 1.41 mm bin
    Weight percent of sample with grain diameter between -0.75 and -0.50 phi, or 1.41 and 1.68 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.175045
    Units:percentage
    Wt. percent in -0.25 phi bin or 1.19 mm bin
    Weight percent of sample with grain diameter between -0.50 and -0.25 phi, or 1.19 and 1.41 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.255851
    Units:percentage
    Wt. percent in 0.00 phi bin or 1 mm bin
    Weight percent of sample with grain diameter between -0.25 and 0.00 phi, or 1 and 1.19 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.343392
    Units:percentage
    Wt. percent in 0.25 phi bin or 0.8409 mm bin
    Weight percent of sample with grain diameter between 0.00 and 0.25 phi, or 0.8409 and 1 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.430932
    Units:percentage
    Wt. percent in 0.50 phi bin or 0.7071 mm bin
    Weight percent of sample with grain diameter between 0.25 and 0.50 phi, or 0.7071 and 0.8409 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.772469
    Units:percentage
    Wt. percent in 0.75 phi bin or 0.5946 mm bin
    Weight percent of sample with grain diameter between 0.50 and 0.75 phi, or 0.5946 and 0.7071 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:3.440706
    Units:percentage
    Wt. percent in 1.00 phi bin or 0.5 mm bin
    Weight percent of sample with grain diameter between 0.75 and 1.00 phi, or 0.5 and 0.5946 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:5.935328
    Units:percentage
    Wt. percent in 1.25 phi bin or 0.4204 mm bin
    Weight percent of sample with grain diameter between 1.00 and 1.25 phi, or 0.4204 and 0.5 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:9.159916
    Units:percentage
    Wt. percent in 1.50 phi bin or 0.3536 mm bin
    Weight percent of sample with grain diameter between 1.25 and 1.50 phi, or 0.3536 and 0.4204 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:13.747887
    Units:percentage
    Wt. percent in 1.75 phi bin or 0.2973 mm bin
    Weight percent of sample with grain diameter between 1.50 and 1.75 phi, or 0.2973 and 0.3536 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:16.772422
    Units:percentage
    Wt. percent in 2.00 phi bin or 0.25 mm bin
    Weight percent of sample with grain diameter between 1.75 and 2.00 phi, or 0.25 and 0.2973 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:16.039201
    Units:percentage
    Wt. percent in 2.25 phi bin or 0.2102 mm bin
    Weight percent of sample with grain diameter between 2.00 and 2.25 phi, or 0.2102 and 0.25 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:12.38595
    Units:percentage
    Wt. percent in 2.50 phi bin or 0.1768 mm bin
    Weight percent of sample with grain diameter between 2.25 and 2.50 phi, or 0.1768 and 0.2102 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:7.024603
    Units:percentage
    Wt. percent in 2.75 phi bin or 0.1487 mm bin
    Weight percent of sample with grain diameter between 2.50 and 2.75 phi, or 0.1487 and 0.1768 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:8.326015
    Units:percentage
    Wt. percent in 3.00 phi bin or 0.125 mm bin
    Weight percent of sample with grain diameter between 2.75 and 3.00 phi, or 0.125 and 0.1487 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:7.900253
    Units:percentage
    Wt. percent in 3.25 phi bin or 0.1051 mm bin
    Weight percent of sample with grain diameter between 3.00 and 3.25 phi, or 0.1051 and 0.125 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:5.771442
    Units:percentage
    Wt. percent in 3.50 phi bin or 0.08839 mm bin
    Weight percent of sample with grain diameter between 3.25 and 3.50 phi, or 0.08839 and 0.1051 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:4.1525
    Units:percentage
    Wt. percent in 3.75 phi bin or 0.07433 mm bin
    Weight percent of sample with grain diameter between 3.50 and 3.75 phi, or 0.07433 and 0.08839 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:4.24974
    Units:percentage
    Wt. percent in 4.00 phi bin or 0.0625 mm bin
    Weight percent of sample with grain diameter between 3.75 and 4.00 phi, or 0.0625 and 0.07433 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:3.556713
    Units:percentage
    Wt. percent in 4.25 phi bin or 0.052556 mm bin
    Weight percent of sample with grain diameter between 4.00 and 4.25 phi, or 0.052556 and 0.0625 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:3.211608
    Units:percentage
    Wt. percent in 4.50 phi bin or 0.044194 mm bin
    Weight percent of sample with grain diameter between 4.25 and 4.50 phi, or 0.044194 and 0.052556 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.873177
    Units:percentage
    Wt. percent in 4.75 phi bin or 0.037163 mm bin
    Weight percent of sample with grain diameter between 4.50 and 4.75 phi, or 0.037163 and 0.044194 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.51708
    Units:percentage
    Wt. percent in 5.00 phi bin or 0.03125 mm bin
    Weight percent of sample with grain diameter between 4.75 and 5.00 phi, or 0.03125 and 0.037163 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:2.694762
    Units:percentage
    Wt. percent in 5.25 phi bin or 0.02628 mm bin
    Weight percent of sample with grain diameter between 5.00 and 5.25 phi, or 0.02628 and 0.03125 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:3.696945
    Units:percentage
    Wt. percent in 5.50 phi bin or 0.0221 mm bin
    Weight percent of sample with grain diameter between 5.25 and 5.50 phi, or 0.0221 and 0.02628 mm. (Source: producer defined)
    Range of values
    Minimum:0.003211
    Maximum:3.761779
    Units:percentage
    Wt. percent in 5.75 phi bin or 0.01858 mm bin
    Weight percent of sample with grain diameter between 5.50 and 5.75 phi, or 0.01858 and 0.0221 mm. (Source: producer defined)
    Range of values
    Minimum:0.028145
    Maximum:4.141502
    Units:percentage
    Wt. percent in 6.00 phi bin or 0.01563 mm bin
    Weight percent of sample with grain diameter between 5.75 and 6.00 phi, or 0.01563 and 0.01858 mm. (Source: producer defined)
    Range of values
    Minimum:0.273433
    Maximum:4.567458
    Units:percentage
    Wt. percent in 6.25 phi bin or 0.01314 mm bin
    Weight percent of sample with grain diameter between 6.00 and 6.25 phi, or 0.01314 and 0.01563 mm. (Source: producer defined)
    Range of values
    Minimum:0.284685
    Maximum:3.470225
    Units:percentage
    Wt. percent in 6.50 phi bin or 0.01105 mm bin
    Weight percent of sample with grain diameter between 6.25 and 6.50 phi, or 0.01105 and 0.01314 mm. (Source: producer defined)
    Range of values
    Minimum:0.338446
    Maximum:3.70965
    Units:percentage
    Wt. percent in 6.75 phi bin or 0.00929 mm bin
    Weight percent of sample with grain diameter between 6.50 and 6.75 phi, or 0.00929 and 0.01105 mm. (Source: producer defined)
    Range of values
    Minimum:0.388489
    Maximum:4.055746
    Units:percentage
    Wt. percent in 7.00 phi bin or 0.00781 mm bin
    Weight percent of sample with grain diameter between 6.75 and 7.00 phi, or 0.00781 and 0.00929 mm. (Source: producer defined)
    Range of values
    Minimum:0.439297
    Maximum:4.84123
    Units:percentage
    Wt. percent in 7.25 phi bin or 0.00657 mm bin
    Weight percent of sample with grain diameter between 7.00 and 7.25 phi, or 0.00657 and 0.00781 mm. (Source: producer defined)
    Range of values
    Minimum:0.461695
    Maximum:5.611425
    Units:percentage
    Wt. percent in 7.50 phi bin or 0.00552 mm bin
    Weight percent of sample with grain diameter between 7.25 and 7.50 phi, or 0.00552 and 0.00657 mm. (Source: producer defined)
    Range of values
    Minimum:0.477374
    Maximum:6.291598
    Units:percentage
    Wt. percent in 7.75 phi bin or 0.00465 mm bin
    Weight percent of sample with grain diameter between 7.50 and 7.75 phi, or 0.00465 and 0.00552 mm. (Source: producer defined)
    Range of values
    Minimum:0.474014
    Maximum:6.608878
    Units:percentage
    Wt. percent in 8.00 phi bin or 0.00391 mm bin
    Weight percent of sample with grain diameter between 7.75 and 8.00 phi, or 0.00391 and 0.00465 mm. (Source: producer defined)
    Range of values
    Minimum:0.463169
    Maximum:7.003944
    Units:percentage
    Wt. percent in 8.25 phi bin or 0.00329 mm bin
    Weight percent of sample with grain diameter between 8.00 and 8.25 phi, or 0.00329 and 0.00391 mm. (Source: producer defined)
    Range of values
    Minimum:0.442245
    Maximum:7.1386
    Units:percentage
    Wt. percent in 8.50 phi bin or 0.00276 mm bin
    Weight percent of sample with grain diameter between 8.25 and 8.50 phi, or 0.00276 and 0.00329 mm. (Source: producer defined)
    Range of values
    Minimum:0.406201
    Maximum:6.868356
    Units:percentage
    Wt. percent in 8.75 phi bin or 0.00232 mm bin
    Weight percent of sample with grain diameter between 8.50 and 8.75 phi, or 0.00232 and 0.00276 mm. (Source: producer defined)
    Range of values
    Minimum:0.383803
    Maximum:6.627284
    Units:percentage
    Wt. percent in 9.00 phi bin or 0.00195 mm bin
    Weight percent of sample with grain diameter between 8.75 and 9.00 phi, or 0.00195 and 0.00232 mm. (Source: producer defined)
    Range of values
    Minimum:0.34944
    Maximum:6.241652
    Units:percentage
    Wt. percent in 9.25 phi bin or 0.00164 mm bin
    Weight percent of sample with grain diameter between 9.00 and 9.25 phi, or 0.00164 and 0.00195 mm. (Source: producer defined)
    Range of values
    Minimum:0.323122
    Maximum:5.814192
    Units:percentage
    Wt. percent in 9.50 phi bin or 0.00138 mm bin
    Weight percent of sample with grain diameter between 9.25 and 9.50 phi, or 0.00138 and 0.00164 mm. (Source: producer defined)
    Range of values
    Minimum:0.298483
    Maximum:5.484977
    Units:percentage
    Wt. percent in 9.75 phi bin or 0.00116 mm bin
    Weight percent of sample with grain diameter between 9.50 and 9.75 phi, or 0.00116 and 0.00138 mm. (Source: producer defined)
    Range of values
    Minimum:0.276085
    Maximum:5.236008
    Units:percentage
    Wt. percent in 10.00 phi bin or 0.00098 mm bin
    Weight percent of sample with grain diameter between 9.75 and 10.00 phi, or 0.00098 and 0.00116 mm. (Source: producer defined)
    Range of values
    Minimum:0.239482
    Maximum:4.699744
    Units:percentage
    Wt. percent in 10.25 phi bin or 0.00082 mm bin
    Weight percent of sample with grain diameter between 10.00 and 10.25 phi, or 0.00082 and 0.00098 mm. (Source: producer defined)
    Range of values
    Minimum:0.21922
    Maximum:4.441209
    Units:percentage
    Wt. percent in 10.50 phi bin or 0.00069 mm bin
    Weight percent of sample with grain diameter between 10.25 and 10.50 phi, or 0.00069 and 0.00082 mm. (Source: producer defined)
    Range of values
    Minimum:0.171975
    Maximum:3.645051
    Units:percentage
    Wt. percent in 10.75 phi bin or 0.00058 mm bin
    Weight percent of sample with grain diameter between 10.50 and 10.75 phi, or 0.00058 and 0.00069 mm. (Source: producer defined)
    Range of values
    Minimum:0.12646
    Maximum:2.911991
    Units:percentage
    Wt. percent in 11.00 phi bin or 0.00049 mm bin
    Weight percent of sample with grain diameter between 10.75 and 11.00 phi, or 0.00049 and 0.00058 mm. (Source: producer defined)
    Range of values
    Minimum:0.079062
    Maximum:2.013073
    Units:percentage
    Wt. percent in 11.25 phi bin or 0.0004 mm bin
    Weight percent of sample with grain diameter between 11.00 and 11.25 phi, or 0.0004 and 0.00049 mm. (Source: producer defined)
    Range of values
    Minimum:0.043069
    Maximum:1.143359
    Units:percentage
    Wt. percent in 11.50 phi bin or 0.00035 mm bin
    Weight percent of sample with grain diameter between 11.25 and 11.50 phi, or 0.00035 and 0.0004 mm. (Source: producer defined)
    Range of values
    Minimum:0.009846
    Maximum:0.263826
    Units:percentage
    Wt. percent in 12.00 phi bin or 0.000241 mm bin
    Weight percent of sample with grain diameter between 11.50 and 12.02 phi, or 0.000241 and 0.00035 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:0.0
    Units:percentage
    Wt. percent in 13.00 phi bin or 0.00012 mm bin
    Weight percent of sample with grain diameter between 12.00 and 13.00 phi, or 0.00012 and 0.000241 mm. (Source: producer defined)
    Range of values
    Minimum:0.0
    Maximum:0.0
    Units:percentage
    Percent Gravel
    Percent of sample greater than 2 mm. (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:42.886786
    Units:Percentage
    Percent Sand
    Percent of sample less than 2 mm and greater than 63 microns. (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:88.512378
    Units:Percentage
    Percent Silt
    Percent of sample less than 63 microns and greater than 4 microns. (Source: Producer defined)
    Range of values
    Minimum:5.458504
    Maximum:51.934979
    Units:Percentage
    Percent Clay
    Percent of sample less than 4 microns. (Source: Producer defined)
    Range of values
    Minimum:3.368493
    Maximum:59.937111
    Units:Percentage
    Percent Mud
    Percent of sample less than 63 microns. (Source: Producer defined)
    Range of values
    Minimum:8.826997
    Maximum:100
    Units:Percentage
    Gravel/Sand
    Ratio of gravel to sand in sample. (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:1.672
    Sand/Silt
    Ratio of sand to silt in sample. (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:16.216
    Silt/Clay
    Ratio of silt to clay in sample. (Source: Producer defined)
    Range of values
    Minimum:0.547
    Maximum:1.999
    Sand/Clay
    Ratio of sand to clay in sample. (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:26.277
    Sand/Mud
    Ratio of sand to mud in sample. (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:10.027
    Gravel/Mud
    Ratio of gravel to mud in sample. (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:1.512
    D5 Phi
    Phi size at D5 for sample. (Source: Producer defined)
    Range of values
    Minimum:-4
    Maximum:6.385
    Units:Phi size
    D10 Phi
    Phi size at D10 for sample. (Source: Producer defined)
    Range of values
    Minimum:-4
    Maximum:6.733
    Units:Phi size
    D16 Phi
    Phi size at D16 for sample. (Source: Producer defined)
    Range of values
    Minimum:-4
    Maximum:7.041
    Units:Phi size
    D25 Phi
    Phi size at D25 for sample. (Source: Producer defined)
    Range of values
    Minimum:-4
    Maximum:7.424
    Units:Phi size
    D50 Phi
    Phi size at D50 for sample. (Source: Producer defined)
    Range of values
    Minimum:0.355
    Maximum:8.404
    Units:Phi size
    D75 Phi
    Phi size at D75 for sample. (Source: Producer defined)
    Range of values
    Minimum:2.159
    Maximum:9.47
    Units:Phi size
    D84 Phi
    Phi size at D84 for sample. (Source: Producer defined)
    Range of values
    Minimum:2.438
    Maximum:9.911
    Units:Phi size
    D90 Phi
    Phi size at D90 for sample. (Source: Producer defined)
    Range of values
    Minimum:3.363
    Maximum:10.25
    Units:Phi size
    D95 Phi
    Phi size at D95 for sample. (Source: Producer defined)
    Range of values
    Minimum:7.134
    Maximum:10.614
    Units:Phi size
    F-W Median
    Phi size median for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:0.354667
    Maximum:8.404258
    Units:Phi size
    F-W Mean
    Phi size mean for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:1.339815
    Maximum:8.399685
    Units:Phi size
    F-W Sorting
    sorting for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:1.321901
    Maximum:4.955557
    Units:Phi size
    F-W Skewness
    skewness for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:-0.594829
    Maximum:0.642501
    Units:Phi size
    F-W Kurtosis
    Kurtosis for sample by Folk and Ward (1957) method. (Source: producer defined)
    Range of values
    Minimum:0.589171
    Maximum:3.366872
    Units:Phi size
    Inman Median
    Phi size median for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:0.354667
    Maximum:8.404258
    Units:Phi size
    Inman Mean
    Phi size mean for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:1.786838
    Maximum:8.425137
    Units:Phi size
    Inman Sorting
    sorting for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:0.651248
    Maximum:6.073926
    Units:Phi size
    Inman Skew 16-84
    skewness for sample (D16-D84) by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:-0.678977
    Maximum:0.657066
    Units:Phi size
    Inman Skew 05-95
    skewness for sample (D5-D95) by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:-1.794207
    Maximum:3.191222
    Units:Phi size
    Inman Kurtosis
    Kurtosis for sample by Inman (1952) method. (Source: producer defined)
    Range of values
    Minimum:-0.014635
    Maximum:4.104987
    Units:Phi size
    Trask Median
    mm size median for sample by Trask (1930) method in mm. (Source: producer defined)
    Range of values
    Minimum:0.002952
    Maximum:0.78205
    Units:millimeters
    Trask Mean
    mm size mean for sample by Trask (1930) method in mm. (Source: producer defined)
    Range of values
    Minimum:0.003671
    Maximum:8.012151
    Units:millimeters
    Trask Sorting
    sorting for sample by Trask (1930) method in mm. (Source: producer defined)
    Range of values
    Minimum:1.33028
    Maximum:25.659343
    Units:millimeters
    Trask Skewness
    skewness for sample by Trask (1930) method in mm. (Source: producer defined)
    Range of values
    Minimum:0.128288
    Maximum:8.164207
    Units:millimeters
    Trask Kurtosis
    kurtosis for sample by Trask (1930) method in mm. (Source: producer defined)
    Range of values
    Minimum:0.002443
    Maximum:0.499323
    Units:millimeters
    Mean Phi
    phi size mean for sample. (Source: producer defined)
    Range of values
    Minimum:1.063433
    Maximum:8.398497
    Units:Phi size
    Mean mm
    mm size mean for sample. (Source: producer defined)
    Range of values
    Minimum:0.002964
    Maximum:0.478492
    Units:millimeters
    Variance
    variance for sample. (Source: producer defined)
    Range of values
    Minimum:1.615962
    Maximum:23.958403
    Units:Phi size
    Std. Dev.
    standard deviation for sample. (Source: producer defined)
    Range of values
    Minimum:1.271205
    Maximum:4.894732
    Units:Phi size
    Skewness
    skewness for sample. (Source: producer defined)
    Range of values
    Minimum:-2.078265
    Maximum:2.178939
    Units:Phi size
    Kurtosis
    kurtosis for sample. (Source: producer defined)
    Range of values
    Minimum:1.531591
    Maximum:10.47131
    Units:Phi size
    Mode in Phi
    Mode or modes of sample in phi units. If sample was multi-modal, multiple mode values reported, separated by semicolon. (Source: producer defined)
    Range of values
    Minimum:2.125
    Maximum:8.377
    Units:Phi size
    Bag Weight
    The weight of the empty sample bag, "NA" indicates that no value was calculated. (Source: producer defined)
    Range of values
    Minimum:3.250
    Maximum:3.345
    Units:grams
    Bag and Wet Sediment Weight
    The weight of the initial wet sample, as it was collected in the sample bag, "NA" indicates that no value was calculated. (Source: producer defined)
    Range of values
    Minimum:15.23
    Maximum:113.81
    Units:grams
    Dry Sediment Weight
    The weight of the dried sediment in the sample (Source: producer defined)
    Range of values
    Minimum:2.520
    Maximum:71.052
    Units:grams
    "NA" indicates that no value was calculated
    Bulk Density
    The bulk density of the sample, calculated as the mass of the dry sediment divided by the volumn of the initial sample (Source: producer defined)
    Range of values
    Minimum:1.135136
    Maximum:1.939838
    Units:grams per cubic centimeter
    "NA" indicates that no value was calculated

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Jessica R Lacy
    • Evan T Dailey
    • Emily M Carlson
  2. Who also contributed to the data set?
    Data collection was funded by U.S. Geological Survey and U.S. Bureau of Reclamation
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA
    United States

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

Why was the data set created?

These data will be used to inform studies of sediment resuspension and transport in Liberty Island and Little Holland Tract and to evaluate the potential for flooded agricultural tracts to contribute to elevated turbidity in adjacent waters.

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: Oct-2017 (process 1 of 5)
    Sediment samples were collected from 2015 to 2017 using a Ponar grab or push core sampler. Sampling positions were recorded using a handheld global navigation satellite system (GNSS) receiver.
    Date: 2017 (process 2 of 5)
    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 a 2 mm and a 63 um sieve 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. Where used, phi sizes are equal to the negative log base 2 of millimeter size.
    Date: 2017 (process 3 of 5)
    Bulk density was calculated by weighing the sample bag, the wet sample in the bag, and the dry sample in the bag. Measurements were made in the USGS Pacific Coastal and Marine Science Center sediment lab. The bulk density reported here was calculated as: water density (1 g/cm3) times sediment density (2.65 g/cm3) divided by water density plus the product of sediment density minus sediment density and water content of the sample.
    Date: 17-Jul-2018 (process 4 of 5)
    Corrected name of theme keyword thesaurus from ISO 19115 Topic Categories to Category. Updated contact information to bring up to USGS PCMSC standards. 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: 05-Sep-2018 (process 5 of 5)
    Corrected Point of Contact and Metadata Contact phone number prefix. No data were changed. 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
  3. What similar or related data should the user be aware of?
    Lacy, Jessica R, and Carlson, Emily M, 2016, Wind-wave and suspended-sediment data from Liberty Island and Little Holland Tract, Sacramento-San Joaquin Delta, California: data release doi:10.5066/F73R0R07, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Snyder, Alex G, Stevens, Andrew W, Carlson, Emily M, and Lacy, Jessica R, 2016, Digital elevation model of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015: data release doi:10.5066/F7RX9954, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Folk, Robert Louis, and Ward, William C., 1957, Brazos River bar; a study in the significance of grain size parameters: Journal article Journal of Sedimentary Research, v. 27, n. 1, p. 3-26, SEPM Society for Sedimentary Geology, Boulder, CO.

    Online Links:

    Inman, Douglas Lamar, 1952, Measures for describing the size distribution of sediments: Journal article Journal of Sedimentary Research, v. 22, n. 3, p. 125-145, SEPM Society for Sedimentary Geology, Boulder, CO.

    Online Links:

    Trask, Parker D., 1930, Mechanical analyses of sediments by centrifuge: Journal article Economic Geology, v. 26, n. 6, p. 581-599, Society of Economic Geologists (SEG), Littleton, CO.

    Online Links:


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

  1. How well have the observations been checked?
    Data values are within the expected values.
  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?
    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 are within the expected values.

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
    U.S. Geological Survey
    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? These data are available in csv format (GrainSizeBD_LHT-LI_2015to2017.csv) along with CSDGM 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?
    The data is available in comma-separated values (CSV) spreadsheet format. Text editing software can be used to open the file, as well as spreadsheet programs, such as Microsoft Excel.

Who wrote the metadata?

Dates:
Last modified: 05-Sep-2018
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA
United States

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/sf_bay_delta/GrainSizeBD_LHT-LI_2015to2017.faq.html>
Generated by mp version 2.9.49 on Wed Nov 28 12:14:58 2018