Abstract
Abstract. Laboratory experiments are a viable approach for improving
process understanding and generating data for the validation of computational
models. However, laboratory-scale models of urban flooding in street networks
are often distorted, i.e. different scale factors are used in the horizontal
and vertical directions. This may result in artefacts when transposing the
laboratory observations to the prototype scale (e.g. alteration of secondary
currents or of the relative importance of frictional resistance). The
magnitude of such artefacts was not studied in the past for the specific case
of urban flooding. Here, we present a preliminary assessment of these
artefacts based on the reanalysis of two recent experimental datasets related
to flooding of a group of buildings and of an entire urban district,
respectively. The results reveal that, in the tested configurations, the
influence of model distortion on the upscaled values of water depths and
discharges are both of the order of 10 %. This research contributes to
the advancement of our knowledge of small-scale physical processes involved in urban
flooding, which are either explicitly modelled or parametrized in urban
hydrology models.
Subject
General Earth and Planetary Sciences,General Engineering,General Environmental Science
Cited by
12 articles.
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