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Young runoff fractions control streamwater age and solute concentration dynamics

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dc.contributor.authorBenettin, Paoloen
dc.contributor.authorBailey, Scott W.en
dc.contributor.authorRinaldo, Andreaen
dc.contributor.authorLikens, Gene E.en
dc.contributor.authorMcGuire, Kevin J.en
dc.contributor.authorBotter, Gianlucaen
dc.contributor.departmentForest Resources and Environmental Conservationen
dc.contributor.departmentVirginia Water Resources Research Centeren
dc.date.accessioned2020-03-20T16:42:40Zen
dc.date.available2020-03-20T16:42:40Zen
dc.date.issued2017-07-31en
dc.description.abstractWe introduce a new representation of coupled solute and water age dynamics at the catchment scale, which shows how the contributions of young runoff waters can be directly referenced to observed water quality patterns. The methodology stems from recent trends in hydrologic transport that acknowledge the dynamic nature of streamflow age and explores the use of water age fractions as an alternative to the mean age. The approach uses a travel time-based transport model to compute the fractions of streamflow that are younger than some thresholds (e.g., younger than a few weeks) and compares them to observed solute concentration patterns. The method is here validated with data from the Hubbard Brook Experimental Forest during spring 2008, where we show that the presence of water younger than roughly 2 weeks, tracked using a hydrologic transport model and deuterium measurements, mimics the variation in dissolved silicon concentrations. Our approach suggests that an age-discharge relationship can be coupled to classic concentration-discharge relationship, to identify the links between transport timescales and solute concentration. Our results highlight that the younger streamflow components can be crucial for determining water quality variations and for characterizing the dominant hydrologic transport dynamics.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesENAC School, Ecole Polytechnique Federale de Lausanne; Andrew W. Mellon Foundation; NSF EAR, Grant/Award Number: 1014507; NSF LTER DEB, Grant/Award Number: 1114804en
dc.description.sponsorshipAndrew W. Mellon Foundation; NSF EARNational Science Foundation (NSF) [1014507]; NSF LTER DEB [1114804]; ENAC School; Ecole Polytechnique Federale de Lausanneen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1002/hyp.11243en
dc.identifier.eissn1099-1085en
dc.identifier.issn0885-6087en
dc.identifier.issue16en
dc.identifier.orcidMcGuire, Kevin J. [0000-0001-5751-3956]en
dc.identifier.urihttp://hdl.handle.net/10919/97389en
dc.identifier.volume31en
dc.language.isoenen
dc.rightsCreative Commons CC0 1.0 Universal Public Domain Dedicationen
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/en
dc.subjecthysteresisen
dc.subjectsolute concentrationen
dc.subjectwater ageen
dc.subjectWater qualityen
dc.subjectweatheringen
dc.titleYoung runoff fractions control streamwater age and solute concentration dynamicsen
dc.title.serialHydrological Processesen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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