Watermovement over a horizontal bed and solitary sanddune

Watermovement over a horizontal bed and solitary sanddune

Termes, A.P.P.

De Vries, M. (mentor)
Vreugdenhil, C.B. (mentor)
Ribberink, J.S. (mentor)
Ooms, G. (mentor)

Civil Engineering and Geosciences

Hydraulic Engineering

1984-05-01

In order to predict waterlevel changes in rivers due to floodwaves and local bedshapes for navigation, the local behaviour of the riverbed should be known. In many cases the bed of a river ~onsists of dunes, which propagate downstraam due to the sediment transport along the dunes. In this report mainly the watermovement but also the sediment transport along a dune is studied. The investigation consists of a theoretica! and an experimental part. In the theoretica! part a calculation of the flowfield above a dune is carried out using a computer model for the watermovement (ODYSSEE computer program of the Delft Hydraulica Laboratory, DHL). In the experimental part the mechanism of the local sediment transport along the dune is studied. The experimental set up consists of a solitary sanddune on a conveyor belt in a flume. The position of the dune is constant due to: conveyor belt velocity = - propagationvelocity of the dune. In this situation the flowfield above the duneis measured using a Laser Doppier Anemometer (LDA), which is tested first in a uniform flow situation. The local sediment transport, which is known along the steady dune, is related to the local bedshearstress.

river dune
bedform
river morphology

http://resolver.tudelft.nl/uuid:4952bdb8-ad0b-46c7-bdeb-9d3a9f132510

Student theses

master thesis

(c) 1984 Termes, A.P.P.