ABSTRACT
The bottom of alluvial water courses, such as rivers and channels, is composed of granular material. These sediments can be transported by flowing water if the flow velocities are sufficiently high. Alternations in the flow velocities, either caused by nature (wet and dry seasons) or by human interference in the natural conditions (construction of structures in the river) will influence the magnitude of the sediment transport. The effect of this changeable sediment is erosion of the riverbed at some places and sedimentation at other locations.
