@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/47d0731d-99bb-49d0-b5b5-89057c30bccc> a dcat:Dataset ;
    dct:description """A previously developed three-dimensional groundwater flow model 
(https://doi.org/10.3133/sir20125183) of the three primary aquifers
in the region north of Aberdeen, South Dakota, was revised to 
assist the City of Aberdeen with water-resource planning.  The 
principal aquifers are the Elm, Middle James, and Deep James. 
The numerical model is intended to be used to (1) simulate 
hydrologic scenarios of interest to groundwater managers and to 
advance the understanding of groundwater budgets and components 
including recharge, discharge, and aquifer storage, (2) compute 
historical and projected system response to natural and anthropogenic 
stresses, and (3) evaluate potential withdrawal scenarios to assist 
with water-management decisions.
		
The three-dimensional groundwater-flow model was developed using 
the USGS's numerical modeling software, MODFLOW-NWT. The 
model included both steady-state (mean) and transient (temporally 
varying) conditions. Steady-state data were from October 1, 1974 to 
September 30, 2009, and the transient time period included data from 
October 1, 1974 to September 30, 2015. The model was calibrated by 
attempting to match simulated and measured or estimated hydraulic 
heads, differences in hydraulic heads between aquifers, and stream 
base flow. Water budgets for the model's layers area were produced 
with ZONEBUDGET.
		
This USGS data release contains all of the input and output files for 
the model described in the associated model documentation report 
(http://doi.org/10.3133/sir20185137). The data release also includes 
(1) MODFLOW-NWT (version 1.1.4) source code, and (2) ZONEBUDGET 
(3.01) source code.""" ;
    dct:identifier "USGS:fd85cfeb-5dab-4621-8458-b1ba183db45a" ;
    dct:issued "2025-11-21T10:24:31.999176"^^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 ((-98.5990 45.4736, -98.5990 45.6771, -98.2767 45.6771, -98.2767 45.4736, -98.5990 45.4736))"^^gsp:wktLiteral ] ;
    dct:title "MODFLOW-NWT model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Joshua F. Valder" ;
            vcard:hasEmail <mailto:jvalder@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/47d0731d-99bb-49d0-b5b5-89057c30bccc/resource/614b0b4b-c38f-420a-9249-0cbe50618116>,
        <https://data.amerigeoss.org/dataset/47d0731d-99bb-49d0-b5b5-89057c30bccc/resource/825d9073-5a12-40de-8cf9-5b03d25e5d8f> ;
    dcat:keyword "aberdeen",
        "amerigeo",
        "amerigeoss",
        "ckan",
        "deep-james-aquifer",
        "elm-aquifer",
        "environment",
        "geo",
        "geoscientificinformation",
        "geoss",
        "groundwater",
        "groundwater-model",
        "inlandwaters",
        "middle-james-aquifer",
        "modflow-nwt",
        "national",
        "north-america",
        "south-dakota",
        "united-states",
        "usgs-fd85cfeb-5dab-4621-8458-b1ba183db45a",
        "usgsgroundwatermodel" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/47d0731d-99bb-49d0-b5b5-89057c30bccc/resource/614b0b4b-c38f-420a-9249-0cbe50618116> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-08-05T18:11:56.851603"^^xsd:dateTime ;
    dct:modified "2025-11-21T10:24:31.987942"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P9JVNFLY> ;
    dcat:mediaType "application/http" .

<https://data.amerigeoss.org/dataset/47d0731d-99bb-49d0-b5b5-89057c30bccc/resource/825d9073-5a12-40de-8cf9-5b03d25e5d8f> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-08-05T18:11:56.851597"^^xsd:dateTime ;
    dct:modified "2025-11-21T10:24:31.987527"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.fd85cfeb-5dab-4621-8458-b1ba183db45a.xml> ;
    dcat:mediaType "text/xml" .

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