Item talk:Q320779
From geokb
{
"DOI": {
"doi": "10.5066/f75719jv",
"prefix": "10.5066",
"suffix": "f75719jv",
"identifiers": [],
"alternateIdentifiers": [],
"creators": [
{
"name": "Stewart, Anne M.",
"nameType": "Personal",
"givenName": "Anne M.",
"familyName": "Stewart",
"affiliation": [],
"nameIdentifiers": [
{
"schemeUri": "https://orcid.org",
"nameIdentifier": "https://orcid.org/0000-0002-3948-3148",
"nameIdentifierScheme": "ORCID"
}
]
}
],
"titles": [
{
"title": "MODFLOW-NWT and MODPATH5 models used to identify potential flowpaths from San Juan Mine to hydrologic receptors, San Juan County, New Mexico"
}
],
"publisher": "U.S. Geological Survey",
"container": {},
"publicationYear": 2017,
"subjects": [
{
"subject": "groundwater model"
}
],
"contributors": [],
"dates": [
{
"date": "1973/2033",
"dateType": "Created"
},
{
"date": "2017",
"dateType": "Issued"
}
],
"language": null,
"types": {
"ris": "GEN",
"bibtex": "misc",
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"resourceType": "Model",
"resourceTypeGeneral": "Model"
},
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{
"relationType": "IsCitedBy",
"relatedIdentifier": "10.3133/sir20175155",
"relatedIdentifierType": "DOI"
}
],
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"version": null,
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"descriptions": [
{
"description": "Coal combustion by-products (CCBs, in the form of ash) produced at the coal-fired San Juan Generating Station in San Juan County, N. Mex., have been buried in former surface-mine pits at the San Juan Coal Mine since power-generation operations began in the early 1970s. This numerical modeling project was performed by the U.S. Geological Survey to estimate the timing of groundwater recovery after the cessation of mining and to identify potential pathways and advective travel times for groundwater transport of metals that may be leached from stored CCBs to arrive at hydrologic receptors after mining operations cease. The USGS numerical modeling package MODFLOW-NWT with MODPATH particle-tracking software was used. Modeling results indicate that groundwater at various CCB storage areas will recover to the former steady state, or in some locations to a new steady-state, after between 6,600 and 10,600 years, depending on proximity to a residual cone-of-groundwater-depression caused by mine dewatering and regional oil-and-gas pumping. Advective particle-track modeling indicates that the number of particles and rates of advective transport will vary depending on hydraulic properties of the mine spoil, particularly on hydraulic conductivity and porosity parameters. Modeling results indicate that particles will migrate from CCB repositories to either the Shumway Arroyo alluvium, and from there to the San Juan River alluvium after between 880 and 1,320 years, or from southern-most CCB repositories directly to San Juan River alluvium, after between 2,200 and 2,400 years after the cessation of mining.",
"descriptionType": "Abstract"
}
],
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"created": "2018-04-03T18:18:05.000Z",
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