Applicability of the De Marchi Hypothesis for Side Weir Flow in the Case of Movable Beds
Publication: Journal of Hydraulic Engineering
Volume 138, Issue 7
Abstract
Side weirs are widely used hydraulic structures typically designed and studied in the case of fixed bed conditions. In the case of subcritical flows, the hydraulics of side weirs can be modelled by using the classical De Marchi hypothesis. In the present work, a generalization of this hypothesis is developed for the case of side weirs over movable beds. Experiments showing the effects and feedbacks between the spilling discharge and the bed morphodynamics are presented. The application of the experimental observations to the generalized De Marchi hypothesis clearly show that the functioning of side weirs on a movable bed can be modelled by using this hypothesis. These findings could be instrumental for the design and verification of these structures.
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Acknowledgments
The authors are grateful to F. Serra and M. Betti for their help during the experimental activity. This research was carried out within the framework of the ‘MITI: Metodologie Innovative per la Tutela dei bacini Idrografici e delle coste’ project, sponsored by the Regione Toscana.
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Published In
Journal of Hydraulic Engineering
Volume 138 • Issue 7 • July 2012
Pages: 653 - 656
Copyright
© 2012. American Society of Civil Engineers.
History
Received: May 2, 2011
Accepted: Jan 18, 2012
Published online: Jan 20, 2012
Published in print: Jul 1, 2012
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