Residence time distributions in surface transient storage zones in streams : estimation via signal deconvolution
Gooseff, Michael N.
Benson, David A.
Briggs, Martin A.
Wollheim, Wilfred M.
Peterson, Bruce J.
Hopkinson, Charles S.
MetadataShow full item record
SubjectTransient storage; Residence time distributions; Surface transient storage; Mobile-immobile exchange; Stream solute transport
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.
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.
Showing items related by title, author, creator and subject.
Briggs, Martin A.; Gooseff, Michael N.; Peterson, Bruce J.; Morkeski, Kate; Wollheim, Wilfred M.; Hopkinson, Charles S. (American Geophysical Union, 2010-06-22)Transient storage of stream water and associated solutes is expected to vary along stream networks in response to related changes in stream hydraulic conditions and morphologic gradients. These spatial changes are relevant ...
Separation of river network–scale nitrogen removal among the main channel and two transient storage compartments Stewart, Robert J.; Wollheim, Wilfred M.; Gooseff, Michael N.; Briggs, Martin A.; Jacobs, Jennifer M.; Peterson, Bruce J.; Hopkinson, Charles S. (American Geophysical Union, 2011-08-30)Transient storage (TS) zones are important areas of dissolved inorganic nitrogen (DIN) processing in rivers. We assessed sensitivities regarding the relative impact that the main channel (MC), surface TS (STS), and hyporheic ...
Northern hemisphere winter atmospheric transient eddy heat fluxes and the Gulf Stream and Kuroshio–Oyashio Extension variability Kwon, Young-Oh; Joyce, Terrence M. (American Meteorological Society, 2013-12-15)Spatial and temporal covariability between the atmospheric transient eddy heat fluxes (i.e., υ′T′ and υ′q′) in the Northern Hemisphere winter (January–March) and the paths of the Gulf Stream (GS), Kuroshio Extension (KE), ...