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Salt dilution and flushing dynamics of an impaired agricultural−urban stream

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dc.contributor.authorLakoba, Vasiliy T.en
dc.contributor.authorWind, Lauren L.en
dc.contributor.authorDeVilbiss, Stephenen
dc.contributor.authorLofton, Mary E.en
dc.contributor.authorBretz, Kristenen
dc.contributor.authorWeinheimer, Alaina R.en
dc.contributor.authorMoore, Chloeen
dc.contributor.authorBaciocco, Colinen
dc.contributor.authorHotchkiss, Erin R.en
dc.contributor.authorHession, W. Cullyen
dc.contributor.departmentBiological Systems Engineeringen
dc.contributor.departmentSchool of Plant and Environmental Sciencesen
dc.contributor.departmentBiological Sciencesen
dc.date.accessioned2021-01-18T19:53:52Zen
dc.date.available2021-01-18T19:53:52Zen
dc.date.issued2020-11-09en
dc.date.updated2021-01-18T19:53:49Zen
dc.description.abstractAnthropogenic freshwater salinization is increasing with global change. Rising freshwater salinity threatens ecosystem biodiversity, health, and services via toxicity to organisms and mobilization of nutrients and metals. Brining roads is one major source of freshwater salinization that continues to grow with rising urbanization. While the detrimental effects of salinization in streams are well-documented, high-frequency, temporal patterns in salt transport, particularly during winter road de-icing in mixed land use landscapes, are less understood. To address this knowledge gap, we analyzed high-frequency specific conductance as a proxy for salinity across 114 high-flow events from 2013 to 2018 in an impaired stream draining mixed agriculture−urban land use. The specific conductance was highest in winter (median = 947 μS cm−1) and decreased with first-order kinetics up to 90 days after brining (β1 = −0.003), suggesting lasting impacts of road de-icing on water quality. Although hysteresis patterns suggested a transition from distal to proximal salt sources, they showed no clear correlation of flushing versus dilution to brining events. While seasonal brining increased salinity in receiving streams, unpredictable transport dynamics reduced the efficacy of hysteresis in characterizing salt transport dynamics. Thus, the complexity of mixed land use watersheds requires more spatially and temporally explicit monitoring to characterize stream salinization dynamics.en
dc.description.versionPublished (Publication status)en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1021/acsestwater.0c00160en
dc.identifier.orcidHession, William [0000-0002-6323-3827]en
dc.identifier.urihttp://hdl.handle.net/10919/101947en
dc.language.isoenen
dc.rightsIn Copyright (InC) - Non-Commercial Use Permitteden
dc.rights.urihttp://rightsstatements.org/vocab/InC-NC/1.0/en
dc.subjectsalten
dc.subjectfreshwateren
dc.subjectsalinizationen
dc.subjectroad saltsen
dc.subjectstream ecologyen
dc.subjectland useen
dc.subjecturbanizationen
dc.subjectStroubles Creeken
dc.titleSalt dilution and flushing dynamics of an impaired agricultural−urban streamen
dc.title.serialES&T: Wateren
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciencesen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/Biological Systems Engineeringen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen
pubs.organisational-group/Virginia Techen

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