Laboratory study on wood accumulation probability at bridge piers

River infrastructures like bridges are prone to accumulations of transported large wood (LW) during floods. To contribute to an improved risk evaluation, the prediction of LW accumulation probability (AP) is crucial. Previous studies on LW AP focused mainly on the influence of a bridge deck. In the...

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Bibliographic Details
Published inJournal of hydraulic research Vol. 58; no. 4; pp. 566 - 581
Main Authors Schalko, Isabella, Schmocker, Lukas, Weitbrecht, Volker, Boes, Robert M.
Format Journal Article
LanguageEnglish
French
Published Madrid Taylor & Francis 06.06.2020
Taylor & Francis Ltd
Subjects
Accumulation
Accumulation probability
Bridge decks
Bridge piers
Bridges
Decks
Flood predictions
flood protection
flood risk assessment
Flow velocity
Flumes
large wood (LW)
Piers
Probability theory
Risk assessment
River beds
river engineering
Roughness
Wood
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Summary:River infrastructures like bridges are prone to accumulations of transported large wood (LW) during floods. To contribute to an improved risk evaluation, the prediction of LW accumulation probability (AP) is crucial. Previous studies on LW AP focused mainly on the influence of a bridge deck. In the present study, flume experiments were conducted to investigate LW AP at bridge piers with special emphasis on (1) approach flow conditions, (2) bridge pier characteristics with different pier roughness, shape, diameter, and pier number, (3) LW characteristics, involving various log lengths, log diameter, log density, LW with and without branches, and uncongested versus (semi-) congested LW transport, and (4) channel bed, i.e. scour. Based on the experiments, AP is mainly a function of approach flow velocity and log length. The results were combined in a design equation to predict AP for risk assessment in engineering application.
ISSN:0022-1686
1814-2079
DOI:10.1080/00221686.2019.1625820