Journal ArticleDOI
A comparison of fibre-optic distributed temperature sensing to traditional methods of evaluating groundwater inflow to streams
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In this article, the results of conventional methods [dye dilution gauging, acoustic Doppler velocimeter (ADV) differential gauging and geochemical end-member mixing] to distributed temperature sensing (DTS) using a fibre-optic cable installed along 900 m of Ninemile Creek in Syracuse, New York, USA, during low-flow conditions (discharge of 1·4 m3 s−1).Abstract:
There are several methods for determining the spatial distribution and magnitude of groundwater inputs to streams. We compared the results of conventional methods [dye dilution gauging, acoustic Doppler velocimeter (ADV) differential gauging, and geochemical end-member mixing] to distributed temperature sensing (DTS) using a fibre-optic cable installed along 900 m of Ninemile Creek in Syracuse, New York, USA, during low-flow conditions (discharge of 1·4 m3 s−1). With the exception of differential gauging, all methods identified a focused, contaminated groundwater inflow and produced similar groundwater discharge estimates for that point, with a mean of 66·8 l s−1 between all methods although the precision of these estimates varied. ADV discharge measurement accuracy was reduced by non-ideal conditions and failed to identify, much less quantify, the modest groundwater input, which was only 5% of total stream flow. These results indicate ambient tracers, such as heat and geochemical mixing, can yield spatially and quantitatively refined estimates of relatively modest groundwater inflow even in large rivers. DTS heat tracing, in particular, provided the finest spatial characterization of groundwater inflow, and may be more universally applicable than geochemical methods, for which a distinct and consistent groundwater end member may be more difficult to identify. Copyright © 2011 John Wiley & Sons, Ltd.read more
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Hyporheic flow and transport processes: Mechanisms, models, and biogeochemical implications
Fulvio Boano,Judson W. Harvey,Andrea Marion,Aaron I. Packman,Roberto Revelli,Luca Ridolfi,Anders Wörman +6 more
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Hydrologic connectivity as a framework for understanding biogeochemical flux through watersheds and along fluvial networks
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CO2 evasion along streams driven by groundwater inputs and geomorphic controls
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References
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Journal ArticleDOI
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Journal ArticleDOI
Fiber optic sensor technology: an overview
Kenneth T. V. Grattan,Tong Sun +1 more
TL;DR: This work presents an overview of progress and developments in the field of fiber optic sensor technology, highlighting the major issues underpinning recent research and illustrating a number of important applications and key areas of effective Fiber optic sensor development.