Mechanisms for sediment fining in a side channel system

R.P. van Denderen, R.M.J. Schielen, S.J.M.H. Hulscher

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Side channels have been constructed in the Dutch river
system to reduce flood risk and to increase the ecological
value of the river. Some of these side channels show large
aggradation and therefore require regular maintenance.
Grain size measurements of the deposited sediment show
that the bed of the side channel contains much finer sediment
(0.2-0.3 mm) than the bed of the main channel (1-2
mm). This suggest that sorting occurs at the bifurcation
of the side channel which likely affects the equilibrium
state and the time scale of the side channel development.
The objective is to reproduce the morphodynamic development
with a 2D numerical model that allows for sorting
processes. The dimensions of the system are based on the
Waal River in the Netherlands.
Original languageEnglish
Number of pages1
Publication statusPublished - 2017
EventRCEM2017 Back to Italy: 10th Symposium on river coastal and estuarine morphodynamics - Trento-Padova, Italy
Duration: 15 Sep 201722 Sep 2017


ConferenceRCEM2017 Back to Italy


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