Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/hess-2017-582
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
07 Nov 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).
Active heat pulse sensing of 3D-flow fields in streambeds
Eddie W. Banks1, Margaret A. Shanafield1, Saskia Noorduijn1, James McCallum1, Jörg Lewandowski2,3, and Okke Batelaan1 1National Centre for Groundwater Research and Training and the College of Science and Engineering, Flinders University, Adelaide, South Australia, Australia
2IGB, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Department Ecohydrology, Berlin, Germany
3Humboldt University Berlin, Geography Department, Berlin, Germany
Abstract. Profiles of temperature time series are commonly used to determine hyporheic flow patterns and hydraulic dynamics in the streambed sediments. Although hyporheic flows are 3D, past research has focused on determining the magnitude of the vertical flow component and how this varies spatially. This study used a portable 56 sensor, 3D temperature array with 3 heat pulse sources to measure the flow direction and magnitude up to 200 mm below the water-sediment interface. Short, one-minute heat pulses were injected at one of the three heat sources and the temperature response was monitored over a period of 30 minutes. Breakthrough curves from each of the sensors were analyzed using a heat transport equation. Parameter estimation and uncertainty analysis was undertaken using the DREAM algorithm, an adaption of the Markov chain Monte Carlo method, to estimate the flux and its orientation. Measurements were conducted in the field and in a sand tank under an extensive range of controlled hydraulic conditions to validate the method. The use of short duration heat pulses provided a rapid, accurate assessment technique for determining dynamic and multi-directional flow patterns in the hyporheic zone and is a basis for improved understanding of biogeochemical processes at the water-streambed interface.

Citation: Banks, E. W., Shanafield, M. A., Noorduijn, S., McCallum, J., Lewandowski, J., and Batelaan, O.: Active heat pulse sensing of 3D-flow fields in streambeds, Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2017-582, in review, 2017.
Eddie W. Banks et al.
Eddie W. Banks et al.
Eddie W. Banks et al.

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