Articles | Volume 27, issue 20
Technical note
25 Oct 2023
Technical note |  | 25 Oct 2023

Technical note: Testing the effect of different pumping rates on pore-water sampling for ions, stable isotopes, and gas concentrations in the hyporheic zone

Tamara Michaelis, Anja Wunderlich, Thomas Baumann, Juergen Geist, and Florian Einsiedl

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Cited articles

Auerswald, K. and Geist, J.: Extent and causes of siltation in a headwater stream bed: catchment soil erosion is less important than internal stream processes, Land Degrad. Dev., 29, 737–748,, 2018. a, b, c
Bavarian State Office of the Environment: Gewässerkundlicher Dienst Bayern. Data and information, (last access: 13 June 2023), 2023. a, b
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Boano, F., Harvey, J. W., Marion, A., Packman, A. I., Revelli, R., Ridolfi, L., and Wörman, A.: Hyporheic flow and transport processes: Mechanisms, models, and biogeochemical implications, Rev. Geophys., 52, 603–679,, 2014. a
Bodmer, P., Wilkinson, J., and Lorke, A.: Sediment properties drive spatial variability of potential methane production and oxidation in small streams, J. Geophys. Res.-Biogeo., 125, e2019JG005213,, 2020.  a
Short summary
Riverbeds are densely populated with microorganisms which catalyze ecologically relevant processes. To study this complex zone, we tested pore-water extraction with microfilter tubes. The method was found to be suitable for the measurement of dissolved solutes but less so for gases. The pumping rate during sample extraction strongly influenced gas analyses in the samples. The combination with an optical oxygen sensor and a temperature monitoring system was found to be highly valuable.