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.

溶解氧浓度和消耗速率是溪流和河流的地下河（HZ）生物活性水平的主要指标。传统观念认为，地下河的生物活性水平总体上具有同质性，并主要由营养物质（碳）供应所控制。在此观点下，生物活性水平的变异由营养物质资源的空间异质性驱动。Reeder 等人（2018）证明了地下河的水力条件对地下河生物活性水平具有主要控制作用。有氧呼吸速率的变异是地下河流速的线性函数。本贡献提供的数据包括：（1）床面和压力分布图以及用于大型、长期水槽实验的床形验证数据，（2）地下河溶解氧的空间和时间分布测量，（3）通过地下河的通量计算，（4）通过地下河的测量和计算停留时间，（5）计算的溶解氧消耗速率常数（KDO）。

参考文献：Reeder, W. J., A. M. Quick, T. B. Farrell, S. G. Benner, K. P. Feris, and D. Tonina. 空间和时间动态：地下河溶解氧浓度与生物活性，水资源研究，doi: 10.1002/2017WR021388.