@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.amerigeoss.org/dataset/819d6815-76e8-437f-9cea-61733d35fa6d> a dcat:Dataset ;
    dct:description """The U.S. Geological Survey (USGS) National Water Quality Network - Rivers and Streams (NWQN) comprises 117 surface-water monitoring sites designed to track ambient water-quality conditions across the nation. This dataset includes field quality-control results (field blank and field replicate concentrations), along with the water-quality result of each associated surface-water sample, of water samples collected from October 2012 through September 2017 at NWQN sites. 
This dataset includes 2 tables and 6 files of plots of the data. Tables are in Comma Separated Value, CSV, format and plotfiles are in Portable Document Format, PDF, format. The plotfiles are intended to provide a succinct view of the data. 
Table1.NWQNFieldBlanksC3.csv
Table2.NWQNFieldReplicatesC3.csv
PlotFile 1. Time-series plots showing concentrations of nutrients, carbon, UV absorbance, and suspended sediments in surface-water samples and field blanks in the National Water Quality Network, water years 2013–17.
PlotFile 2. Scatterplots showing concentrations of pairs of surface-water samples and field replicates for nutrients, carbon, and suspended sediment in samples in the National Water Quality Network, water years 2013–17 .
PlotFile 3. Time-series plots showing concentrations of major ions and trace elements in surface-water samples and field blanks in the National Water Quality Network, water years 2013–17. 
PlotFile 4. Scatterplots showing concentrations of pairs of surface-water samples and field replicates for major ions and trace elements in the National Water Quality Network, water years 2013–17.
PlotFile 5. Time-series plots showing concentrations of pesticides in surface-water samples and field blanks in the National Water Quality Network, water years 2013–17.
PlotFile 6. Scatterplots showing concentrations of pairs of surface-water samples and field replicates for pesticides in the National Water Quality Network, water years 2013–17.""" ;
    dct:identifier "USGS:5e9088f182ce172707ebdf20" ;
    dct:issued "2025-11-23T00:38:26.275050"^^xsd:dateTime ;
    dct:modified "20200825"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-125.6836 24.1267, -125.6836 50.0077, -66.7969 50.0077, -66.7969 24.1267, -125.6836 24.1267))"^^gsp:wktLiteral ] ;
    dct:title "Field blank and field replicate datasets for inorganic and organic compounds collected for the National Water Quality Network, water years 2013-17" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Laura Medalie" ;
            vcard:hasEmail <mailto:lmedalie@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/819d6815-76e8-437f-9cea-61733d35fa6d/resource/4bf7fe8e-c5b3-42b8-b6b0-f00df87c0047>,
        <https://data.amerigeoss.org/dataset/819d6815-76e8-437f-9cea-61733d35fa6d/resource/e6ee0635-d3da-4c87-86f8-a4235d7fd164> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "ckan",
        "geo",
        "geoss",
        "major-ions",
        "national",
        "national-water-quality-network",
        "north-america",
        "nutrients",
        "pesticides",
        "quality-control",
        "surface-water-quality",
        "trace-elements",
        "united-states",
        "usgs-5e9088f182ce172707ebdf20" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/819d6815-76e8-437f-9cea-61733d35fa6d/resource/4bf7fe8e-c5b3-42b8-b6b0-f00df87c0047> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:02:46.688976"^^xsd:dateTime ;
    dct:modified "2025-11-23T00:38:26.265883"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P96VY980> ;
    dcat:mediaType "application/http" .

<https://data.amerigeoss.org/dataset/819d6815-76e8-437f-9cea-61733d35fa6d/resource/e6ee0635-d3da-4c87-86f8-a4235d7fd164> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:02:46.688966"^^xsd:dateTime ;
    dct:modified "2025-11-23T00:38:26.265441"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5e9088f182ce172707ebdf20.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> a foaf:Agent ;
    foaf:name "US Migrating" .