Item talk:Q274256

{

 "USGS Publications Warehouse": {
   "@context": "https://schema.org",
   "@type": "Article",
   "additionalType": "Journal Article",
   "name": "Chlorofluorocarbons as tracers of groundwater transport processes in a shallow, silty sand aquifer",
   "identifier": [
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse IndexID",
       "value": "70185326",
       "url": "https://pubs.usgs.gov/publication/70185326"
     },
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse Internal ID",
       "value": 70185326
     },
     {
       "@type": "PropertyValue",
       "propertyID": "DOI",
       "value": "10.1029/94WR02528",
       "url": "https://doi.org/10.1029/94WR02528"
     }
   ],
   "journal": {
     "@type": "Periodical",
     "name": "Water Resources Research",
     "volumeNumber": "31",
     "issueNumber": "3"
   },
   "inLanguage": "en",
   "isPartOf": [
     {
       "@type": "CreativeWorkSeries",
       "name": "Water Resources Research"
     }
   ],
   "datePublished": "1995",
   "dateModified": "2019-02-25",
   "abstract": "Detailed depth profiles of Chlorofluorocarbons CFC-11(CFCl3(, CFC-12 (CF2Cl2) and CFC-113 (C2F3Cl3) have been obtained from a well-characterized field site in central Ontario. Aquifer materials comprise predominantly silty sands, with a mean organic carbon content of 0.03%. Nearly one-dimensional flow exists at this site, and the vertical migration of a well-defined\u00a03H peak has been tracked through time. Detailed vertical sampling has allowed CFC tracer velocities to be estimated to within 10%. Comparison with\u00a03H profiles enables estimation of chlorofluorocarbon transport parameters. CFC-12 appears to be the most conservative of the CFCs measured. Sorption at this site is low (Kd\u00a0< 0.03), and degradation does not appear to be important. CFC- 113 is retarded both with respect to CFC-12 and with respect to\u00a03H (Kd\u00a0= 0.09\u22120.14). CFC-11 appears to be degraded both in the highly organic unsaturated zone and below 3.5 m depth in the aquifer, where dissolved oxygen concentrations decrease to below 0.5 mg L\u22121. The half-life for CFC-11 degradation below 3.5 m depth is less than 2 years. While apparent CFC-12 ages match hydraulic ages to within 20% (up to 30 years), apparent CFC-11 and CFC-113 ages significantly overestimate hydraulic ages at our field site.",
   "description": "10 p.",
   "publisher": {
     "@type": "Organization",
     "name": "American Geophysical Union"
   },
   "author": [
     {
       "@type": "Person",
       "name": "Cook, P.G.",
       "givenName": "P.G.",
       "familyName": "Cook"
     },
     {
       "@type": "Person",
       "name": "Solomon, D. K.",
       "givenName": "D. K.",
       "familyName": "Solomon"
     },
     {
       "@type": "Person",
       "name": "Plummer, Niel nplummer@usgs.gov",
       "givenName": "Niel",
       "familyName": "Plummer",
       "email": "nplummer@usgs.gov",
       "identifier": {
         "@type": "PropertyValue",
         "propertyID": "ORCID",
         "value": "0000-0002-4020-1013",
         "url": "https://orcid.org/0000-0002-4020-1013"
       },
       "affiliation": [
         {
           "@type": "Organization",
           "name": "National Research Program - Eastern Branch",
           "url": "https://www.usgs.gov/centers/arizona-water-science-center"
         }
       ]
     },
     {
       "@type": "Person",
       "name": "Busenberg, E.",
       "givenName": "E.",
       "familyName": "Busenberg"
     },
     {
       "@type": "Person",
       "name": "Schiff, S.L.",
       "givenName": "S.L.",
       "familyName": "Schiff"
     }
   ],
   "funder": [
     {
       "@type": "Organization",
       "name": "Toxic Substances Hydrology Program",
       "url": null
     }
   ]
 }

}