ABSTRACT
Sediment transport governs or influences many situations that are of importance to mankind. Silt deposition reduces the capacity of reservoirs, interferes with harbour operation and closes or modifies the path of watercourses. Erosion or scour may undermine structures. In rivers and on coastlines, sediment movements form a part of the long term pattern of geological processes. Clearly, sediment transport occurs only if there is an interface between a moving fluid and an erodible boundary. The activity at this interface is extremely complex. Once sediment is being transported, the flow is no longer a simple fluid flow, since two materials are involved.
