Bed-material transport over entrance sills at longitudinal training walls

W.J. van Os, W.S.J. Uijttewaal, R.J. Labeur, A.L. Osorio, E. Mosselman, L. Lokin

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


Groynes have been replaced by longitudinal training walls in an 11-km long pilot project to optimize training of the river Waal in the Netherlands. These train­ ing walls improve navigability, reduce flood levels, create a sheltered second channel with more favourable ecological conditions, and decrease the erosive action on the river bed that is responsible for large-scale bed degradation. River managers wish to assess whether longitudinal training walls could have similar advantages along other parts of the Dutch Rhine branches (without excessive increase of maintenance costs). The required maintenance dredging depends on the amount of sediment entering the sheltered channel over an entrance sill situated at the upstream edge of the longitudinal training wall. Currently operational morphodynamic models cannot reliably compute this sedi­ ment flux. We present laboratory experiments to study the passage of bed sediment at different discharge distributions between the main and sheltered channel, and different degrees of submergence.
Original languageEnglish
Title of host publicationRiver Flow 2020
Subtitle of host publicationProceedings of the 10th Conference on Fluvial Hydraulics (Delft, Netherlands, 7-10 July 2020)
EditorsWim Uijttewaal, Mario J. Franca, Daniel Valero, Victor Chavarrias, Claudia Ylla Arbos, Ralph Schielen, Alessandra Crosato
Place of PublicationLondon
PublisherCRC Press/Balkema
ISBN (Electronic)978-1-003-11095-8
ISBN (Print)978-0-367-62773-7
Publication statusPublished - 2020
Event10th Conference on Fluvial Hydraulics, River Flow 2020 - Delft, Netherlands
Duration: 7 Jul 202010 Jul 2020
Conference number: 10


Conference10th Conference on Fluvial Hydraulics, River Flow 2020
Abbreviated titleRiver Flow


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