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Water 2017, 9(7), 518; https://doi.org/10.3390/w9070518

Positive Surge Propagation in Sloping Channels

1
Department ICEA, University of Padova, Via Loredan 20, 35131 Padova, Italy
2
Intl Center of Tidal Hidro- and Morphodynamics, University of Padova, 35131 Padova, Italy
*
Author to whom correspondence should be addressed.
Received: 22 June 2017 / Revised: 3 July 2017 / Accepted: 9 July 2017 / Published: 13 July 2017
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Abstract

A simplified model for the upstream propagation of a positive surge in a sloping, rectangular channel is presented. The model is based on the assumptions of a flat water surface and negligible energy dissipation downstream of the surge, which is generated by the instantaneous closure of a downstream gate. Under these hypotheses, a set of equations that depends only on time accurately describes the surge wave propagation. When the Froude number of the incoming flow is relatively small, an approximate analytical solution is also proposed. The predictive ability of the model is validated by comparing the model results with the results of an experimental investigation and with the results of a numerical model that solves the full shallow water equations. View Full-Text
Keywords: breaking and undular surge; environmental hydraulics; laboratory experiments; open-channel flow; physical modelling; shallow water modelling breaking and undular surge; environmental hydraulics; laboratory experiments; open-channel flow; physical modelling; shallow water modelling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Viero, D.P.; Peruzzo, P.; Defina, A. Positive Surge Propagation in Sloping Channels. Water 2017, 9, 518.

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