@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/081b8794-fff6-4895-9345-a82cd8db8bf0> a dcat:Dataset ;
    dct:description """This raster data set represents water-level change in the High Plains aquifer of the United States 
from 1995 to 2000, in feet. The High Plains aquifer underlies 112.6 million acres (176,000 square 
miles) in parts of eight States: Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, 
Texas, and Wyoming. The aquifer's saturated thickness ranges from near zero to about 1,200 feet 
(Weeks and Gutentag, 1981). Water-level declines occurred in parts of the High Plains aquifer soon 
after the onset of substantial irrigation with groundwater (about 1950) (Luckey and others, 1981; 
Gutentag and others, 1984). This data set was generated in a geographic information system from 
water-level-change data from wells measured in 1995 and 2000 and from some additional wells in 
New Mexico, which were measured in 1996, 1997, 2001, and 2002.  For this data set, areas of no 
substantial change were designated as areas where water-level change was between a rise of 1 
foot and a decline of 1 foot; the raster was set to zero in the areas of no substantial change.

REFERENCES CITED -- 

Gutentag, E.D., Heimes, F.J., Krothe, N.C., Luckey, R.R., and Weeks, J.B., 1984, Geohydrology 
of the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South 
Dakota, Texas, and Wyoming: U.S. Geological Survey Professional Paper 1400-B, 63 p.

Luckey, R.R., Gutentag, E.D., and Weeks, J.B., 1981, Water-level and saturated-thickness changes, 
predevelopment to 1980, in the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, 
Oklahoma, South Dakota, Texas, and Wyoming: U.S. Geological Survey Hydrologic Investigations 
Atlas HA-652, 2 sheets, scale 1:2,500,000.

Weeks, J.B., and Gutentag, E.D., 1981, Bedrock geology, altitude of base, and 1980 saturated 
thickness of the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, 
South Dakota, Texas, and Wyoming: U.S. Geological Survey Hydrologic Investigations Atlas HA-648, 
2 sheets, scale 1:2,500,000.""" ;
    dct:identifier "USGS:ed4ec290-5090-47f7-96e0-73f5f4399eec" ;
    dct:issued "2025-11-19T21:03:16.080814"^^xsd:dateTime ;
    dct:modified "20201117"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
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            locn:geometry "POLYGON ((-106.0162 31.5984, -106.0162 43.8064, -96.2253 43.8064, -96.2253 31.5984, -106.0162 31.5984))"^^gsp:wktLiteral ] ;
    dct:title "Water-level change, High Plains aquifer, 1995 to 2000" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "V.L. McGuire" ;
            vcard:hasEmail <mailto:vlmcguir@usgs.gov> ] ;
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        "aquifers",
        "ckan",
        "colorado",
        "geo",
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        "geoss",
        "great-plains",
        "ground-water",
        "groundwater",
        "high-plains",
        "high-plains-aquifer",
        "inlandwaters",
        "kansas",
        "national",
        "nebraska",
        "new-mexico",
        "north-america",
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        "texas",
        "united-states",
        "usgs-ed4ec290-5090-47f7-96e0-73f5f4399eec",
        "water-level-change",
        "wyoming" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/081b8794-fff6-4895-9345-a82cd8db8bf0/resource/1cbc8ed5-d99d-4834-a43d-155cd6fdd416> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T19:27:01.286351"^^xsd:dateTime ;
    dct:modified "2025-11-19T21:03:16.053534"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://water.usgs.gov/lookup/getspatial?sir12-5177_hp_wlc9500> ;
    dcat:mediaType "application/http" .

<https://data.amerigeoss.org/dataset/081b8794-fff6-4895-9345-a82cd8db8bf0/resource/8c6509a9-be65-46ca-a830-06c0e1a0ca81> a dcat:Distribution ;
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    dct:issued "2022-07-28T19:27:01.286344"^^xsd:dateTime ;
    dct:modified "2025-11-19T21:03:16.052632"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
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