Cohesive sediment removal from a fixed bed.

A few experiments were carried out, in a 1:1 scale laboratory flume, to evaluate, by the acquisition and processing of photographic images, the capability of currents flowing in a stream to remove cohesive sediments deposited on the bed of a river. The results of the experiments, expressed in terms of area and volume eroded, and changes in the concentration of suspended sediments carried by water, were consistent with the physical phenomenon, and congruous with others results already reported in the literature. Con-sidering the goodness of the results obtained by the experiments carried out, it was possible to assert that the procedure adopted for the evaluation of sediment removal is suitable for studying the erosion and transport phenomena involving most kinds of granular or cohesive sediments.