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dc.contributorVirginia Techen_US
dc.contributor.authorInamdar, Shreeramen_US
dc.contributor.authorDhillon, Gurbiren_US
dc.contributor.authorSingh, Shatrughanen_US
dc.contributor.authorDutta, Sudarshanen_US
dc.contributor.authorLevia, Delphisen_US
dc.contributor.authorScott, Durelleen_US
dc.contributor.authorMitchell, Myronen_US
dc.contributor.authorVan Stan, Johnen_US
dc.contributor.authorMcHale, Patricken_US
dc.date.accessioned2014-02-05T14:20:25Z
dc.date.available2014-02-05T14:20:25Z
dc.date.issued2013-04-01
dc.identifier.citationInamdar, S., G. Dhillon, S. Singh, S. Dutta, D. Levia, D. Scott, M. Mitchell, J. Van Stan, and P. McHale (2013), Temporal variation in end-member chemistry and its influence on runoff mixing patterns in a forested, Piedmont catchment, Water Resour. Res., 49, 1828-1844, doi:10.1002/wrcr.20158.
dc.identifier.issn0043-1397
dc.identifier.urihttp://hdl.handle.net/10919/25326
dc.description.abstractRunoff mixing patterns for base flow and 42 storm events were investigated for a 3 year period (20082010) in a 12 ha forested catchment in the mid-Atlantic, Piedmont region of the USA. Eleven distinct runoff sources were sampled independently and included: precipitation, throughfall, stemflow, litter leachate, wetland soil water, tension soil water, shallow groundwater, groundwater seeps, hyporheic water, riparian groundwater, and deep groundwater. A rigorous end-member mixing analysis (EMMA) was implemented and all base flow, storm-flow, and end-member chemistries were evaluated in a two-dimensional mixing space. End-members enclosed stream water chemistry and displayed a systematic continuum in EMMA space. Base-flow chemistry of stream waters was similar to groundwater seeps. Storm-event runoff was attributed to contributions from surficial sources (precipitation, throughfall, stemflow, and litter leachate) on the rising limb of the discharge hydrograph that was followed by soil and shallow groundwater sources on the recession limb of the hydrograph. The shapes of the storm-event hysteresis loops (wide versus tight, linear patterns) varied with hydrologic conditions from wet, hydrologically well-connected conditions to a dry, disconnected state. Detailed temporal data on end-member chemistry allowed us to explain the changes in stream water hysteresis patterns and runoff mixing space to shifts in end-member chemistry that occurred as the catchment became hydrologically disconnected. These results highlight the need to recognize the temporal variation in end-member chemistry as a function of catchment wetness and the need to collect high-frequency data on bothstream water as well as potential runoff end-members to better characterize catchment flow paths and mixing responses.
dc.description.sponsorshipNational Science Foundation (NSF, Hydrologic Sciences Program)EAR-0809205
dc.language.isoen_US
dc.publisherAmerican Geophysical Union
dc.subjectEnd member mixing analysis (EMMA)en_US
dc.subjectHydrologic flow pathsen_US
dc.subjectStorm flowen_US
dc.subjectBase flowen_US
dc.subjectHydrograph separationen_US
dc.subjectSurface runoffen_US
dc.subjectCatchmenten_US
dc.subjectSoil-wateren_US
dc.subjectStormflow generationen_US
dc.subjectHeadwater catchmenten_US
dc.subjectNatural traceren_US
dc.subjectBlack-foresten_US
dc.subjectStreamen_US
dc.subjectFlowen_US
dc.subjectModelsen_US
dc.subjectUSAen_US
dc.subjectHillslopeen_US
dc.titleTemporal variation in end-member chemistry and its influence on runoff mixing patterns in a forested, Piedmont catchmenten_US
dc.typeArticleen_US
dc.identifier.urlhttp://onlinelibrary.wiley.com/doi/10.1002/wrcr.20158/pdf
dc.date.accessed2014-01-31
dc.title.serialWater Resources Research
dc.identifier.doihttps://doi.org/10.1002/wrcr.20158
dc.type.dcmitypeTexten_US


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