@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/64d69773-5c74-4cf4-aab1-46ac53d39323> a dcat:Dataset ;
    dct:description """This digital dataset contains the compaction data for 24 extensometers used for observations 
in the Central Valley Hydrologic Model (CVHM).  The Central Valley encompasses an approximate 
50,000 square-kilometer region of California. The complex hydrologic system of the Central Valley 
is simulated using the USGS numerical modeling code MODFLOW-FMP (Schmid and others, 2006).  
This simulation is referred to here as the CVHM (Faunt, 2009). Utilizing MODFLOW-FMP, the CVHM 
simulates groundwater and surface-water flow, irrigated agriculture, land subsidence, and other key 
processes in the Central Valley on a monthly basis from 1961-2003.  The total active modeled area 
is 20,334 square-miles.   Water levels, water-level altitude changes, and water-level and potentiometric-
surface altitude maps; streamflows; boundary flows; subsidence; groundwater pumpage; water use; 
and water-delivery observations were used to constrain parameter estimates throughout the calibration 
of the CVHM.  Measured compaction from extensometers placed in the valley was used as a subsidence 
calibration target. The extensometer locations were obtained from USGS files and GPS locations. 
Subsidence monitoring observations can provide valuable information about hydrologic parameters 
such as elastic and inelastic skeletal specific storage. The CVHM was adjusted to fit the range of 
measured compaction at the extensometer sites utilizing UCODE-2005 (Poeter and others, 2006) 
and manual calibration. The calibration target was the measured compaction from several extensometers 
in the region. Compaction though delayed drainage and re-pressurizing of aquitards was not simulated. 
The CVHM is the most recent regional-scale model of the Central Valley developed by the U.S. 
Geological Survey (USGS).  The CVHM was developed as part of the USGS Groundwater Resources 
Program (see "Foreword", Chapter A, page iii, for details).""" ;
    dct:identifier "USGS:8ad9e431-730e-4355-a230-dd8f83a97e94" ;
    dct:issued "2025-11-22T06:51:17.211538"^^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 ((-123.8315 34.5199, -123.8315 40.7486, -117.9163 40.7486, -117.9163 34.5199, -123.8315 34.5199))"^^gsp:wktLiteral ] ;
    dct:title "Measured compaction for 24 extensometers in the Central Valley" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Claudia C. Faunt" ;
            vcard:hasEmail <mailto:ccfaunt@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/64d69773-5c74-4cf4-aab1-46ac53d39323/resource/57a7f669-d79e-48ca-b36c-cb0edaa18654>,
        <https://data.amerigeoss.org/dataset/64d69773-5c74-4cf4-aab1-46ac53d39323/resource/ba95f13f-76f9-4f47-ad33-0e1c643013d4> ;
    dcat:keyword "alameda-county",
        "amador-county",
        "amerigeo",
        "amerigeoss",
        "butte-county",
        "calaveras-county",
        "california",
        "central-valley",
        "central-valley-aquifer",
        "central-valley-california",
        "central-valley-hydrologic-model",
        "ckan",
        "colusa-county",
        "contra-costa-county",
        "cv-rasa",
        "el-dorado-county",
        "extensometer",
        "flow-model-cvhm",
        "fresno-county",
        "geo",
        "geoscientificinformation",
        "geoss",
        "glenn-county",
        "groundwater",
        "groundwater-availability-of-the-central-valley-aquifer",
        "humboldt-county",
        "hydrogeology",
        "hydrology",
        "inlandwaters",
        "kern-county",
        "kings-county",
        "lake-county",
        "madera-county",
        "mariposa-county",
        "mendocino-county",
        "merced-county",
        "model",
        "monterey-county",
        "napa-county",
        "national",
        "nevada-county",
        "north-america",
        "placer-county",
        "sacramento-county",
        "sacramento-valley",
        "san-benito-county",
        "san-joaquin-county",
        "san-joaquin-valley",
        "san-luis-obispo-county",
        "santa-barbara-county",
        "santa-clara-county",
        "shasta-county",
        "solano-county",
        "sonoma-county",
        "stanislaus-county",
        "subsidence",
        "sutter-county",
        "tehama-county",
        "texture-model",
        "trinity-county",
        "tulare-county",
        "tuolumne-county",
        "united-states",
        "usgs-8ad9e431-730e-4355-a230-dd8f83a97e94",
        "ventura-county",
        "yolo-county",
        "yuba-county" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/64d69773-5c74-4cf4-aab1-46ac53d39323/resource/57a7f669-d79e-48ca-b36c-cb0edaa18654> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-07T14:47:03.898390"^^xsd:dateTime ;
    dct:modified "2025-11-22T06:51:17.179155"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.8ad9e431-730e-4355-a230-dd8f83a97e94.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/64d69773-5c74-4cf4-aab1-46ac53d39323/resource/ba95f13f-76f9-4f47-ad33-0e1c643013d4> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-07T14:47:03.898398"^^xsd:dateTime ;
    dct:modified "2025-11-22T06:51:17.179582"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://water.usgs.gov/lookup/getspatial?subsidence_measured_data> ;
    dcat:mediaType "application/http" .

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