Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 551282
Title Flow and bed morphology response to the introduction of wood logs for sediment management
Author(s) Poelman, Judith Y.; Hoitink, Antonius J.F.; Ruijsscher, Timo V. de
Source Advances in Water Resources 130 (2019). - ISSN 0309-1708 - p. 1 - 11.
DOI https://doi.org/10.1016/j.advwatres.2019.05.023
Department(s) Hydrology and Quantitative Water Management
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Physical scale model - Sediment management - Submerged vanes - Wood logs
Abstract Submerged vanes alter sediment transport by inducing a secondary circulation without significantly compromising the conveyance capacity of the river. Here, a laboratory study is conducted to investigate whether wood logs or trunks can be used for sediment management. The effectivity of a traditional vane field is compared to set-ups with screens of stacked logs, and large individual trunks. Results indicate that all three set-ups redistribute sediment but that the trunks are least effective in inducing a secondary circulation and cause higher turbulence and drag, leading to a stronger decrease in streamwise velocity. We conclude that a field of trunks acts as a sediment trap because of a strong reduction of the streamwise velocity, without a strong secondary flow such as dominant in the other configurations. Screens of stacked logs can be successfully implemented in rivers, as they are only slightly less effective than traditional vanes. The risk of piping underneath objects and the associated scour are points of concern.
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