@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/15fccc09-eeb5-48e1-bbd2-c154724445f5> a dcat:Dataset ;
    dct:description """A digital hydrologic network was developed to support SPAtially Referenced Regression on Watershed 
attributes (SPARROW) models within selected regions of the United States. These regions correspond 
with the U.S. Geological Survey's National Water Quality Assessment (NAWQA) Program Major River 
Basin (MRB) study units 2, 3, 4, 5, and 7 (Preston and others, 2009).  MRB2, covers the South 
Atlantic-Gulf and Tennessee River basins.  MRB3, covers the Great Lakes, Ohio, Upper Mississippi, 
and Souris-Red-Rainy River basins.  MRB4, covers the Missouri River basins.  MRB5, covers the 
Lower Mississippi, Arkansas-White-Red, and Texas-Gulf River basins.  MRB7, covers the Pacific 
Northwest River basins. 
		
The digital hydrologic network described here represents surface-water pathways (MRB_E2RF1) 
and associated catchments (MRB_E2RF1WS). It serves as the fundamental framework to spatially 
reference and summarize explanatory information supporting nutrient SPARROW models (Brakebill 
and others, 2011; Wieczorek and LaMotte, 2011). The principal geospatial dataset used to support 
this regional effort was based on an enhanced version of a 1:500,000 scale digital stream-reach 
network (ERF1_2) (Nolan et al., 2002). Enhancements included associating over 3,500 water-quality 
monitoring sites to the reach network, improving physical locations of stream reaches at or near 
monitoring locations, and generating drainage catchments based on 100m elevation data.
		
A unique number (MRB_ID) identifies each reach as a single unit. This unique number is also shared 
by the catchment area drained by the reach, thus spatially linking the hydrologically connected 
streams and the respective drainage area characteristics. In addition, other relevant physical, 
environmental, and monitoring information can be associated to the common network and accessed 
using the unique identification number.""" ;
    dct:identifier "USGS:c85f91fe-2d12-4278-a7be-3ed19f5cd881" ;
    dct:issued "2025-11-20T03:53:10.749539"^^xsd:dateTime ;
    dct:modified "20201117"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-128.2905 23.0332, -128.2905 52.4501, -64.9598 52.4501, -64.9598 23.0332, -128.2905 23.0332))"^^gsp:wktLiteral ] ;
    dct:title "A Digital Hydrologic Network Supporting NAWQA MRB SPARROW Modeling--MRB_E2RF1WS" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "John W. Brakebill" ;
            vcard:hasEmail <mailto:jwbrakeb@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/15fccc09-eeb5-48e1-bbd2-c154724445f5/resource/2d046387-b244-4980-affd-35c99cfc0a37>,
        <https://data.amerigeoss.org/dataset/15fccc09-eeb5-48e1-bbd2-c154724445f5/resource/88960544-6954-48f3-bf3f-f86858a94d9f> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "ckan",
        "conterminous-united-states",
        "environment",
        "geo",
        "geoscientificinformation",
        "geoss",
        "inlandwaters",
        "major-river-basin",
        "mrb",
        "mrb2",
        "mrb3",
        "mrb4",
        "mrb5",
        "mrb7",
        "national",
        "nawqa",
        "network",
        "north-america",
        "reach",
        "reservoir",
        "rf1",
        "river",
        "sparrow",
        "stream",
        "united-states",
        "usgs-c85f91fe-2d12-4278-a7be-3ed19f5cd881",
        "water-quality" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/15fccc09-eeb5-48e1-bbd2-c154724445f5/resource/2d046387-b244-4980-affd-35c99cfc0a37> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T19:30:56.572834"^^xsd:dateTime ;
    dct:modified "2025-11-20T03:53:10.734759"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.c85f91fe-2d12-4278-a7be-3ed19f5cd881.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/15fccc09-eeb5-48e1-bbd2-c154724445f5/resource/88960544-6954-48f3-bf3f-f86858a94d9f> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T19:30:56.572841"^^xsd:dateTime ;
    dct:modified "2025-11-20T03:53:10.735176"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://water.usgs.gov/lookup/getspatial?mrb_e2rf1ws> ;
    dcat:mediaType "application/http" .

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