Three-dimensional modelling of secondary flow in river bends

The flow in a river bend has a large influence on the cross-sectional profile of the bend. Due to the curvature of the bend a secondary flow, which is perpendicular to the main flow, occurs. The secondary flow is directed outwards in the upper part of the cross-section and inwards in the lower part of the cross-section. It causes by means of the...

Characterization of the non-uniform geometry of mountain rivers

The objective of the study is the characterization of the non-uniform geometry of a mountain river and the development of a method that identifies this geometry. Identification of the geometry enables simplification of a certain river section in modelling, which can be applied in a wide range of applications, for example the prediction of water...

Longitudinal profiles of rivers with a composite cross-section

In one-dimensional river modelling it is common to schematise the cross-section into a rectangular cross-section with a constant width. If a quasi-steady flow is assumed, the equilibrium longitudinal profile is known and unique: the bottom slope is constant and equals the water surface slope. However, numerical calculations at DELFT HYDRAULICS...