Abstract
Abstract. Natural dynamics of river floodplains are driven by the interaction of flow
and patchy riparian vegetation, which has implications for channel
morphology and diversity of riparian habitats. Fundamental mechanisms
affecting the dynamics of flow in such systems are still not fully
understood due to a lack of experimental data collected in natural
environments that are free of the unavoidable scaling effects in laboratory
studies. Here we present a detailed dataset on the hydrodynamics of shallow wake
flows that develop behind solid and porous obstructions. The dataset was
collected during a field experimental campaign carried out in a side branch
of the gravel-bed Tagliamento River in northeast Italy. The dataset consists
of 30 experimental runs in which we varied the diameter of the
surface-mounted obstruction, its solid volume fraction, its porosity at
the leading edge, the object's submergence and the approach velocity. Each
run included: (1) measurements of mean velocity and turbulence in the
longitudinal transect through the centreline of the flow with up to 25–30
sampling locations and from 8 to 10 lateral profiles measured at 14
locations, (2) detailed surveys of the free surface topography and (3) flow
visualizations and video recordings of the wake patterns using a drone. The
field scale of the experimental setup, precise control of the approach
velocity, configuration of models and natural gravel-bed context for
this experiment makes this dataset unique. Besides enabling the examination
of scaling effects, these data also allow the verification of numerical
models and provide insight into the effects of driftwood accumulations on
the dynamics of wakes. Data are available with open access via the Zenodo portal (Shumilova et
al., 2020) with DOI https://doi.org/10.5281/zenodo.3968748.
Subject
General Earth and Planetary Sciences
Cited by
3 articles.
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