Morphodynamic responds of groyne fields to the lowering of crest level of the groynes in the Waal River, The Netherlands

The lowering of the crest of the groynes in the River Waal is one of the measures being applied in the Netherlands to reduce the water levels at high water conditions. A total of 750 groynes will be lowered lengthwise by 1 to 2 meters. An expected side-effect is sedimentation in the main channel, due to redistribution of the discharge in the cross-section. Also, the flow through the groyne fields will increase, so erosion in the groyne field is to be expected. In order to get insight in the morphological developments after lowering the groynes, a pilot project has been conducted. It consisted... Mehr ...