Spatially and temporally distributed, high-resolution dissolved oxygen data for the hyporheic zone of multiple dune-like bedforms.

Dissolved oxygen concentrations and consumption rates are a primary indicator of bioactivity levels in the hyporheic zone (HZ) of streams and rivers. Conventional wisdom has held that bioactivity levels in the hyporheic zone were generally homogeneous and primarily controlled by nutrient (carbon) supplies. In this view, variations in bioactivity levels are driven by spatial heterogeneity of nutrient resources. Reeder et al. (2018) demonstrated that hyporheic hydraulics exert primary control over bioactivity levels in the HZ. Variations in aerobic respiration rates are a linear function of the hyporheic flow velocity. The data provided in this contribution includes: (1) bed surface and pressure profiles along with validation data for the bedforms used in a large-scale, long-term flume experiment, (2) spatially and temporally distributed hyporheic dissolved oxygen measurements, (3) calculated fluxes through the hyporheic, (4) calculated and measured residence times through the hyporheic and (5) calculated dissolved oxygen consumption rate constants (KDO).

Reference:
Reeder, W. J., A. M. Quick, T. B. Farrell, S. G. Benner, K. P. Feris, and D. Tonina Spatial and Temporal Dynamics of Dissolved Oxygen Concentrations and Bioactivity in the Hyporheic Zone, Water Resources Research, doi: 10.1002/2017WR021388.