Observing temporal patterns of vertical flux through streambed sediments using time-series analysis of temperature records

Lautz, Laura K.

doi:10.1016/j.jhydrol.2012.07.006

Cited by 65 publications

(77 citation statements)

References 43 publications

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“…Therefore, inter‐seasonal changes in surface–subsurface exchange, driven by the relationship between stream stage and subsurface hydraulic gradients (Woessner, ) likely played a key role in governing T s differences among years. Similar hydrologic controls on T s have been observed at smaller temporal scales (Brown and Hannah, 2007), and our findings are supported with previous work showing seasonal variation of stream‐subsurface hydraulic gradients in response to hydrologic events (Sophocleous, ; Lautz, ). Indeed, the effect of surface–subsurface exchange has been the focus of recent studies demonstrating these exchanges are as important as atmospheric fluxes in governing T s patterns (Leach and Moore, ).…”

Section: Discussionmentioning

confidence: 98%

A comparison of surface and subsurface controls on summer temperature in a headwater stream

Macdonald

Boon

Byrne

et al. 2013

Hydrological Processes

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This study compared summer stream temperature between two years in the Star Creek catchment, Alberta, a headwater basin on the eastern slopes of the Canadian Rocky Mountains. Star Creek is a subsurface water dominated stream, which represents important habitat for native salmonid species. Hydrometeorological data from May to September of 2010 and 2011 accompanied by stream energy budget calculations were used to describe the drivers of stream temperature in this small forested stream. Mean, maximum, and minimum weekly stream temperatures were lower from May to August and higher in September 2011 compared to 2010. Weekly range in stream temperature was also different between years with a higher range in 2010. Inter‐annual stream temperature variation was attributed discharge differences between years, shown to be primarily governed by catchment‐scale moisture conditions. This study demonstrates that both meteorological and hydrological processes must be considered in order to understand stream temperature response to changing environmental conditions in mountainous regions. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Discussionmentioning

confidence: 98%

A comparison of surface and subsurface controls on summer temperature in a headwater stream

Macdonald

Boon

Byrne

et al. 2013

Hydrological Processes

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“…This pattern was most evident upstream and downstream of secondary riffles (Figures 3a and 3b), where shallow hyporheic flow paths are expected to start and end. This vertical pattern is not an artifact of the one-dimensional heat tracing method, which can measure the vertical component of oblique flow even under nonideal conditions [Lautz, 2010[Lautz, , 2012.…”

Section: Patterns Of Hyporheic Exchange Around Crossvanesmentioning

confidence: 92%

Spatial patterns of hyporheic exchange and biogeochemical cycling around cross‐vane restoration structures: Implications for stream restoration design

Gordon

Lautz

Daniluk

2013

Water Resources Research

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[1] Natural channel design restoration projects in streams often include the construction of cross-vanes, which are stone, dam-like structures that span the active channel. Vertical hyporheic exchange flux (HEF) and redox-sensitive solutes were measured in the streambed around four cross-vanes with different morphologies. Observed patterns of HEF and redox conditions are not dominated by a single, downstream-directed hyporheic flow cell beneath cross-vanes. Instead, spatial patterns of moderate (<0.4 m d À1 ) upwelling and downwelling are distributed in smaller cells around pool and riffle bed forms upstream and downstream of structures. Patterns of biogeochemical cycling are controlled by dissolved oxygen concentrations and resulting redox conditions, and are also oriented around secondary bed forms. Strong downwelling into the hyporheic zone (0.5-3.5 m d À1 ) was observed immediately upstream of structures, but was limited to an area 1-2 m from the cross-vane; these hyporheic flow paths likely rejoin the stream at the base of cross-vanes after residence times too short to alter nitrate concentrations or accumulate reaction products. Total hyporheic exchange volumes are $0.4% of stream discharge in restored reaches of 45-55 m. Results show that shallow hyporheic flow and associated biogeochemical cycling near cross-vanes is primarily controlled by secondary bed forms created or augmented by the cross-vane, rather than by the cross-vane itself. This study suggests that cross-vane restoration structures benefit the stream ecosystem by creating heterogeneous patches of varying HEF and redox conditions in the hyporheic zone, rather than by processing large amounts of nutrients to alter in-stream water chemistry.Citation: Gordon, R. P., L. K. Lautz, and T. L. Daniluk (2013), Spatial patterns of hyporheic exchange and biogeochemical cycling around cross-vane restoration structures: Implications for stream restoration design, Water Resour.

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“…[, ], Molina‐Giraldo et al . [], and Lautz [] have modeled temporally variable streambed flux to evaluate spatiotemporal patterns in hyporheic heat transport. These models include dynamic harmonic regression to perform spectral decomposition of the heat signal or time series analysis to identify explicitly the time series signature of hyporheic temperature that is propagated by each frequency of temperature variation in the stream.…”

Section: Hyporheic Heat Transportmentioning

confidence: 99%

Hyporheic flow and transport processes: Mechanisms, models, and biogeochemical implications

et al. 2014

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Fifty years of hyporheic zone research have shown the important role played by the hyporheic zone as an interface between groundwater and surface waters. However, it is only in the last two decades that what began as an empirical science has become a mechanistic science devoted to modeling studies of the complex fluid dynamical and biogeochemical mechanisms occurring in the hyporheic zone. These efforts have led to the picture of surface-subsurface water interactions as regulators of the form and function of fluvial ecosystems. Rather than being isolated systems, surface water bodies continuously interact with the subsurface. Exploration of hyporheic zone processes has led to a new appreciation of their wide reaching consequences for water quality and stream ecology. Modern research aims toward a unified approach, in which processes occurring in the hyporheic zone are key elements for the appreciation, management, and restoration of the whole river environment. In this unifying context, this review summarizes results from modeling studies and field observations about flow and transport processes in the hyporheic zone and describes the theories proposed in hydrology and fluid dynamics developed to quantitatively model and predict the hyporheic transport of water, heat, and dissolved and suspended compounds from sediment grain scale up to the watershed scale. The implications of these processes for stream biogeochemistry and ecology are also discussed.

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Observing temporal patterns of vertical flux through streambed sediments using time-series analysis of temperature records

Cited by 65 publications

References 43 publications

A comparison of surface and subsurface controls on summer temperature in a headwater stream

A comparison of surface and subsurface controls on summer temperature in a headwater stream

Spatial patterns of hyporheic exchange and biogeochemical cycling around cross‐vane restoration structures: Implications for stream restoration design

Hyporheic flow and transport processes: Mechanisms, models, and biogeochemical implications

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