Dataset: Groundwater-born Fe (II) affects concentrations of dissolved O2 in streamwater

The data set was obtained during an experimentally simulated inflow of Fe(II)-rich groundwater into the open stream water of a flume system to quantify its effect on dissolved oxygen concentration in both the stream water and the hyporheic zone. The experimental setup consisted of 12 flumes, half used for input of groundwater augmented with Fe(II), while the other half used as controls. We studied the effects of coarse (6% fine sediment content) sediment vs. fine (28 % fine sediment content) sediment and mean (3 L s-1) vs. low (0.5 L s-1) flow rate within a threefold replicated, crossed design.  Weekly sampling campaigns were performed to analyze Fe(II), Fe(III), DOC,  DO, and pH concentrations in the pore water (hyporheic zone) and in the open water over five consecutive weeks.