The report discusses experiments on ploughing the river bed to understand how to maintain the Waal river. By conducting small-scale tests, researchers can try different methods to improve the ploughing process and study how a buffer forms in front of the plough. They discovered that ploughing in the same direction as the current requires less force than ploughing against it. This discrepancy was explained, and a lot of data and videos were collected to help improve the ploughing process in the Waal river.