Author(s): C. Nalluri; E. M. Alvarez; R. A. Kleijwegt
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Keywords: No Keywords
Abstract: This paper presents some preliminary results of the research studies in which the behaviour of synthetic cohesive sediment (with rheological properties similar to the sediments found in sewers) in channels of circular cross-section is studied. In order to have a comparative basis, initiation experiments using non-cohesive sands were carried out for a range of sand sizes and channel slopes. In this case initiation of erosion occurs at a lower shear stress than predicted by the Shields' curve. A typical erosion pattern is found to occur in all cohesive sediment experiments. Critical shear stresses are found to be much higher than those of the non-cohesive sands and seem to be dependent on the rheological properties of the synthetic sediment studied.
Year: 1989