Scholarly record
DEVELOPMENT NEW SEDIMENT TRANSPORT EQUATION FOR FLUME
Abstract
Sediment transport rates are a function of flow hydraulics, bed composition, and upstream sediment supply. Open-channel flow problems are relatively more difficult to solve than those of closed-conduit because the shape and size of a natural channel vary in a wide range from rivulets to large rivers. While the artificial (manmade) channel has a regular geometric shape, the cross-sectional shape of natural channels may be very irregular. In a movable boundary channel the cross section undergoes deformation due to scour and deposition of sediment transport by the flow in the channel. Flow depth, width, longitudinal and side slopes, and plan of the channels can change with discharge. An open channel in which the shape and size of the cross section and the slope of the bottom are not constant is termed nonprismatic. In this research, a sediment transport relationships was developed for the laboratory flumes. The results show that the width/depth ratio has an important role in prediction of sediment transport, but the role is less important than the role of flow velocity, channel slope, and grain size. The trends from sediment transport relationships show that the sediment transport increases as W/d increases for flumes.
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References26
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