Journal ArticleDOI
Role of Resistance Coefficient in Seasonal Adjustments in Alluvial Rivers
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TLDR
In this article, the role played by the seasonal variation in the Manning rugosity coefficient, n, equalizes the sediment transporting capacity with sediment supply in the dune bed-form regime.Abstract:
Using the river, canal, and flume data, it is found that the role played by the seasonal variation in the Manning rugosity coefficient, n, equalizes the sediment transporting capacity with sediment supply in the dune bed-form regime. Aggradation/degradation in a sand-bed river is thus avoided on a seasonal basis. A relation between the dimensionless rugosity coefficient and the dimensionless ratio of stream power to sediment concentration exists in sand-bed rivers for any specific gauge height. Once field measurements of the sediment transport rate are made and such a relationship is worked out, thereafter, it may be possible to estimate the sediment concentration for each observed flow discharge merely by applying this relationship adopting the data of velocity, depth, slope, and bed material size which are routinely observed at a stream-gauging site.read more
Citations
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A Concept of Regime Theory in Unlined Canals
TL;DR: In this article, the authors presented the investigation of Lacey's Regime concepts for unlined canals in alluvial soil and compared the data collected from the month of March to June 2011 and were analyzed.
References
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Book
Fluvial Processes in River Engineering
TL;DR: The authors collects and collates the significant advances in analytical methods for alluvial channel design, river morphology, and mathematical simulation of river channel changes from an engineering point of view, and presents a complete analytical treatment of river morphology and its responses to environmental and human-made changes from the engineering perspective.
Journal ArticleDOI
Friction Factors for Flow in Sand-Bed Channels
Abu M. Z. Alam,John F. Kennedy +1 more
TL;DR: In this article, a new predictor for friction factors of flows in sand-bed channels is developed, based on a dimensional analysis to obtain the form of the quantities entering the relation between the geometry of the bed features, flow properties, and the equivalent shear stress due to the form-drag of the ripples, dunes, etc.
Journal ArticleDOI
Temperature and Missouri River Stages near Omaha
TL;DR: In this article, the authors used the form resistance curve proposed by Einstein and Barbarossa to describe the flow resistance, and the bed form prediction diagram presented by Vanoni is very applicable.