Residence time distributions in surface transient storage zones in streams : estimation via signal deconvolution


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dc.contributor.author Gooseff, Michael N.
dc.contributor.author Benson, David A.
dc.contributor.author Briggs, Martin A.
dc.contributor.author Weaver, Mitchell
dc.contributor.author Wollheim, Wilfred M.
dc.contributor.author Peterson, Bruce J.
dc.contributor.author Hopkinson, Charles S.
dc.date.accessioned 2011-05-31T19:59:55Z
dc.date.available 2011-11-11T09:28:47Z
dc.date.issued 2011-05-11
dc.identifier.citation Water Resources Research 47 (2011): W05509 en_US
dc.identifier.uri http://hdl.handle.net/1912/4628
dc.description Author Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Water Resources Research 47 (2011): W05509, doi:10.1029/2010WR009959. en_US
dc.description.abstract Little is known about the impact of surface transient storage (STS) zones on reach-scale transport and the fate of dissolved nutrients in streams. Exchange with these locations may influence the rates of nutrient cycling often observed in whole-stream tracer experiments, particularly because they are sites of organic matter collection and lower flow velocities than those observed in the thalweg. We performed a conservative stream tracer experiment (slug of dissolved NaCl) in the Ipswich River in northeastern Massachusetts and collected solute tracer data both in the thalweg and adjacent STS zones at three locations in a fifth-order reach. Tracer time series observed in STS zones are an aggregate of residence time distributions (RTDs) of the upstream transport to that point (RTDTHAL) and that of the temporary storage within these zones (RTDSTS). Here we demonstrate the separation of these two RTDs to determine the RTDSTS specifically. Total residence times for these individual STS zones range from 4.5 to 7.5 h, suggesting that these zones have the potential to host important biogeochemical transformations in stream systems. All of the RTDSTS show substantial deviations from the ideal prescribed by the two-state (mobile/immobile) mass transfer equations. The deviations indicate a model mismatch and that parameter estimation based on the mass transfer equations will yield misleading values. en_US
dc.description.sponsorship This research was funded by the National Science Foundation, grants DEB 06-14350 and EAR 07- 49035, and DOE grant DE-FG02-07ER15841. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2010WR009959
dc.subject Transient storage en_US
dc.subject Residence time distributions en_US
dc.subject Surface transient storage en_US
dc.subject Mobile-immobile exchange en_US
dc.subject Stream solute transport en_US
dc.title Residence time distributions in surface transient storage zones in streams : estimation via signal deconvolution en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2010WR009959

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