@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/77d40433-ecfe-45f8-a8d0-99f4922e4bd8> a dcat:Dataset ;
    dct:description "Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the Chesapeake Bay Nontidal network (NTN) stations for the period 1985 through 2018. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on  Time, Discharge, and Season).  Yields (represents the mass of constituent transported from a unit area of a given watershed)  are used to compare the export loads from one basin to another.  Yield results are obtained by dividing the annual load (pounds) of a given constituent by the respective watershed area (acres) from which the constituent was transported.  Yield results presented represent the average annual per-acre loads of nitrogen, phosphorus, and suspended sediment exported from each of the Chesapeake Bay nontidal network stations for two possible time periods:  2009-2018 (10 year average yield) and 2014-2018 (5 year average yield).  The file containing 10- and 5-year average yields for all applicable NTN monitoring stations is provided in the \"Attached Files\" section." ;
    dct:identifier "USGS:5e222508e4b014c853042d66" ;
    dct:issued "2025-11-22T19:27:22.679514"^^xsd:dateTime ;
    dct:modified "20200827"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-79.1675 36.2085, -79.1675 42.7144, -74.9048 42.7144, -74.9048 36.2085, -79.1675 36.2085))"^^gsp:wktLiteral ] ;
    dct:title "Chesapeake Bay Nontidal Network 1985-2018: Average annual yields" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Douglas L. Moyer" ;
            vcard:hasEmail <mailto:dlmoyer@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/77d40433-ecfe-45f8-a8d0-99f4922e4bd8/resource/c6832e82-8758-484c-b594-48c5fc2459f1>,
        <https://data.amerigeoss.org/dataset/77d40433-ecfe-45f8-a8d0-99f4922e4bd8/resource/de02ab0e-a1f8-40df-9b42-4dd3f25bab4b> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "chesapeake-bay-watershed",
        "ckan",
        "delaware",
        "geo",
        "geoss",
        "load-analysis",
        "maryland",
        "national",
        "new-york",
        "nitrogen",
        "north-america",
        "nutrients",
        "pennsylvania",
        "phosphorus",
        "rivers",
        "suspended-sediment",
        "trends",
        "united-states",
        "usgs-5e222508e4b014c853042d66",
        "virginia",
        "washington-dc",
        "water-quality",
        "weighted-regression",
        "west-virginia",
        "wrtds" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/77d40433-ecfe-45f8-a8d0-99f4922e4bd8/resource/c6832e82-8758-484c-b594-48c5fc2459f1> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:04:26.778321"^^xsd:dateTime ;
    dct:modified "2025-11-22T19:27:22.664920"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5e222508e4b014c853042d66.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/77d40433-ecfe-45f8-a8d0-99f4922e4bd8/resource/de02ab0e-a1f8-40df-9b42-4dd3f25bab4b> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:04:26.778331"^^xsd:dateTime ;
    dct:modified "2025-11-22T19:27:22.665390"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P931M7FT> ;
    dcat:mediaType "application/http" .

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