Schematic diagram of a RISS combined with a benthic flux chamber. The platform made of poly carbonate (thickness 0.6 cm) can be pushed into the sediment with minimum disturbance, and the Rhizons are then moved horizontally into the sediment as well as back into the protective grooves by nylon cords. Porewater profiles can be determined underneath the benthic chamber, with negligible effect for the benthic flux measurement.

From Seeberg-Elverfeldt J., Schlüter M., Feseker T., and Kölling M. (2005) Rhizon sampling of porewaters near the sediment-water interface of aquatic systems. Limnol. Oceanogr.: Methods 3, 361-371.