Item talk:Q306647
From geokb
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"@type": "Article",
"additionalType": "Journal Article",
"name": "Interpretation of concentration\u2010discharge patterns in acid\u2010neutralizing capacity during storm flow in three small, forested catchments in Shenandoah National Park, Virginia",
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"value": "10.1029/2003WR002709",
"url": "https://doi.org/10.1029/2003WR002709"
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"journal": {
"@type": "Periodical",
"name": "Water Resources Research",
"volumeNumber": "40",
"issueNumber": "5"
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"inLanguage": "en",
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"datePublished": "2004",
"dateModified": "2018-04-02",
"abstract": "Episodic concentration\u2010discharge (c\u2010Q) plots are a popular tool for interpreting the hydrochemical response of small, forested catchments. Application of the method involves assuming an underlying conceptual model of runoff processes and comparing observed\u00a0c\u2010Q\u00a0looping patterns with those predicted by the model. We analyzed and interpreted\u00a0c\u2010Q\u00a0plots of acid\u2010neutralizing capacity (ANC) for 133 storms collected over a 7\u2010year period from three catchments in Shenandoah National Park, Virginia. Because of their underlying lithologies the catchments represent a gradient in both hydrologic and geochemical behavior, ranging from a flashy, acidic, poorly buffered catchment to a moderate, neutral, well\u2010buffered catchment. The relative frequency of observed anticlockwise\u00a0c\u2010Q\u00a0loops in each catchment decreased along this gradient. Discriminant function analysis indicated that prestorm base flow ANC was an important predictor of loop rotation direction; however, the strength of the predictive relationship decreased along the same gradient. The trends were consistent with several equally plausible three\u2010component mixing models. Uncertainty regarding end\u2010member timing and relative volume and possible time variation in end\u2010member concentrations were key factors precluding identification of a unique model. The inconclusive results obtained on this large data set suggest that identification of underlying runoff mechanisms on the basis of a small number of\u00a0c\u2010Q\u00a0plots without additional supporting evidence is likely to be misleading.",
"description": "Article W05301; 9 p.",
"publisher": {
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"name": "American Geophysical Union"
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"author": [
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"name": "Hornberger, George M.",
"givenName": "George M.",
"familyName": "Hornberger"
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{
"@type": "Person",
"name": "Rice, Karen C. kcrice@usgs.gov",
"givenName": "Karen C.",
"familyName": "Rice",
"email": "kcrice@usgs.gov",
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"@type": "Organization",
"name": "Virginia Water Science Center",
"url": "https://www.usgs.gov/centers/virginia-and-west-virginia-water-science-center"
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{
"@type": "Person",
"name": "Webb, James R.",
"givenName": "James R.",
"familyName": "Webb"
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"name": "Chanat, Jeffrey G. jchanat@usgs.gov",
"givenName": "Jeffrey G.",
"familyName": "Chanat",
"email": "jchanat@usgs.gov",
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"name": "Virginia Water Science Center",
"url": "https://www.usgs.gov/centers/virginia-and-west-virginia-water-science-center"
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"funder": [
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"@type": "Organization",
"name": "Virginia Water Science Center",
"url": "https://www.usgs.gov/centers/virginia-and-west-virginia-water-science-center"
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"name": "United States",
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