Articles | Volume 27, issue 20
https://doi.org/10.5194/hess-27-3769-2023
https://doi.org/10.5194/hess-27-3769-2023
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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Latest update: 21 Jun 2024
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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.