Bed load movement over a fully developed armor layer -A tracer experiment

S. Spiller, N. Rüther, Kl Koll, Ka Koll

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

A cooperation between NTNUTrondheim and the Leichtweiß-Institute for Hydraulic Engineering and Water Resources in Braunschweig brought up an experiment regarding the movement of constantly added tracer particles over a fully developed armor layer. The experiment was performed in a straight hydraulic flume at the hydraulic laboratory in Braunschweig. After developing a static armor layer, additional 60 kg of sediment (d=3 to 5 mm) were added at the upstream end of the flume, constantly over a total time of one hour. Those tracer particles were dyed in a distinctive color with a magnetic sub layer, so that they could easily be distinguished from the bed material after the experiment. This hour of tracer supply was long enough to produce an equilibrium of tracer in- and output at some point, so that the experimental situation can be compared to a persistent tracer addition. The study gave insight in the transport behavior of tracer particles over a developed armor layer under steady flow conditions. It contributed to a discussion about the destabilization of armored streambeds due to upstream sediment addition. Further investigations at NTNU will show how armor layers and additional sediment react on unsteady flow conditions.

Original languageEnglish
Title of host publicationRiver Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics
Pages465-471
Number of pages7
StatePublished - 2012
Externally publishedYes
EventInternational Conference on Fluvial Hydraulics, River Flow 2012 - San Jose, Costa Rica
Duration: 5 Sep 20127 Sep 2012

Publication series

NameRiver Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics
Volume1

Conference

ConferenceInternational Conference on Fluvial Hydraulics, River Flow 2012
Country/TerritoryCosta Rica
CitySan Jose
Period5/09/127/09/12

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