{
"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
}
]
}
}