By using flumes in greenhouse experiments, we created a gradient of flume-scale heterogeneity of patch-scale flow increasing the number of bed-roughness elements and we determined flume- and patch-scale nitrogen-uptake following stable isotope 15N-NO3 tracer injections. This dataset includes the measurements of patch scale flow velocity performed with Acoustic Doppler Velocimetry (ADV). These measurements were performed prior to the addition of 15N-NO3.
Replication at patch scale: 50 per flume for patch-scale flow velocity--This study was supported by the scholarship "DAAD Forschungsstipendien für promovierte Nachwuchswissenschaftler (Postdoc- Programm)" of the German Academic Exchange Service.