The Role of Stage on Flow and Sediment Transport in Gravel-bed Rivers with Pool-riffle Morphology

The Role of Stage on Flow and Sediment Transport in Gravel-bed Rivers with Pool-riffle Morphology

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Focus the high velocity core initially near the outer bank and then towards the center of the channel. Once the constriction is drowned out, the high velocity core shifts further inward toward the point bar due to the increased pressure gradient force, leading to an expected shift in the zone of maximum sediment transport. Additionally, the development of helical flow was enhanced with increased stage, due to the imbalance between the centrifugal force and the counteracting pressure-gradient force. Lastly, a set of flume experiments was completed to better understand the morphologic response of bar-pool-riffle bed forms following a sediment pulse. Results demonstrate that the patterns of sediment pulse migration are largely-stage dependent, favoring translational wave movement as discharge is increased and dispersional behavior at lower flows. A conceptual model is developed to further explain the patterns of sediment storage and routing through bar-pool-riffle topography following pu.Measuring flow velocity and sediment transport with an acoustic Doppler current profiler. Geomorphology, 68, 25a€“37. ... Electronic total station operation manual, model TC805, 157 ... Water Resources Research, 42, W10427. Maddux T.B.anbsp;...


Title:The Role of Stage on Flow and Sediment Transport in Gravel-bed Rivers with Pool-riffle Morphology
Author:
Publisher:ProQuest - 2007
ISBN-13:

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