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A human‐made entrance to a side channel separated from the river by a longitudinal training dam can be considered a new, emergent type of river bifurcation. To understand the processes controlling the diversion of flow and sediment toward the side channel at such bifurcations, a comprehensive field monitoring program was performed in the Waal River...
As dunes and larger scale bed forms such as bars coexist in rivers, the question arises whether dune dynamics are influenced by interaction with the underlying bed topography. The present study aims to establish the degree in which dune characteristics in two and three dimensions are influenced by an underlying topography dominated by non‐migrating...
Tijdens een uitgebreide pilotstudie in de Waal is onderzocht wat de effecten van langsdammen met bijbehorende oevergeulen zijn op stromingspatronen, morfologie en de sturing daarvan.
As part of a general trend towards river management solutions that provide more room for the river, longitudinal training dams (LTDs) have recently been constructed in the inner bend of the Dutch Waal River, replacing groynes. LTDs split the river in a main channel and a bank-connected side channel with a sill at the entrance. In the present study,...
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...
Longitudinal training dams (LTDs) have been built over a length of 10 km in the Dutch River Waal as an alternative to groyne fields, splitting the river in a fairway and a bank-connected side channel in the inner bend. Here, we study the physical mechanisms governing the three-dimensional flow and its effect on local morphology at the flow divide u...
Dunes commonly dominate the bed of sandy rivers and they are of central importance in predicting flow resistance and water levels. In the present study, we show that by using light-weight polystyrene particles as substrate in a laboratory setting, promising morphodynamic similarity is obtained between dunes in shallow flow (flume) and deep flow (fi...
A new measurement method for continuous detection of bed forms in movable bed laboratory experiments is presented and tested. The device consists of a line laser coupled to a 3D-camera, which makes use of triangulation. This allows to measure bed forms during morphodynamic experiments, without removing the water from the flume. A correction is appl...
RiverCare (http://www.ncr-web.org/rivercare/about) is a Dutch research program. 21 researchers at 5 universities collaborate with knowledge institutes, consultancies and government organizations. RiverCare aims at better understanding the fundamental processes that drive eco-morphological changes in rivers, predict the intermediate and long-term developments. We use that knowledge to improve river governance, reduce maintenance costs and increase benefits of river interventions. We want to put our knowledge into practice not only in the Netherlands but also abroad.