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Experimental study on erosion capacity of raindrop impacted flow
Third-party funded project
Project title Experimental study on erosion capacity of raindrop impacted flow
Principal Investigator(s) Kuhn, Nikolaus J.
Co-Investigator(s) Fister, Wolfgang
Greenwood, Philip
Organisation / Research unit Departement Umweltwissenschaften / Physiogeographie und Umweltwandel (Kuhn)
Project start 01.05.2012
Probable end 31.05.2012
Status Completed
Abstract

An experimental erosion facility was developed within the Physical Geography and Environmental Research Group at the University of Basel, for the purpose of measuring raindrop-induced saltation of material over water flow depths ranging from ca. 1.5-7 mm and under as near constant flow velocity conditions as possible. The design and configuration of the experimental equipment (i.e. rainfall simulator and erosion plot) provided a means of closely controlling key variables associated with raindrop-induced saltation, and included slope gradient, near homogenous rainfall distribution and intensity, median drop size, flow velocity, flow depth and particle size characteristics over a series of rainfall simulations. The preliminary analyses of the results are tentatively interpreted as evidence of the efficacy of the equipment to recreate as near constant conditions as possible for those variables listed above during the rainfall simulations. This provides a potential means of accurately measuring the process of raindrop-induced saltation over a range of shallow flow depths and at near constant flow velocity. The results are believed to provide accurate information on the influence and relative importance of water depth and/or substrate characteristics during raindrop-induced saltation. Overall, the findings generated during this early phase of the experimental campaign are particularly encouraging and the initial data-set represents a basis on which further refinements to the equipment and to the experimental protocol can be made before undertaking a more intensive experimental campaign using a range of different substrates with a narrower grain-size range.

Financed by Swiss National Science Foundation (SNSF)

Published results ()

  ID Autor(en) Titel ISSN / ISBN Erschienen in Art der Publikation
1532243  Greenwood, P.; Fister, W.; Kinnell, P. I. A.; Rüegg, H. -R.; Kuhn, N. J.  Developing and testing a precision erosion measurement facility for elucidating mobilization mechanisms in shallow-flow conditions      Publication: ConferencePaper (Artikel, die in Tagungsbänden erschienen sind) 

Documents ()

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28/03/2024