Physical Modeling of Sheet Flow on Rough Impervious Surfaces
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Volume 135, Issue 6
Abstract
This paper presents results from an extensive experimental study of sheet flow on rough impervious surfaces that are used to represent highway pavement. Experiments were performed on three surfaces under no-rainfall and simulated rainfall conditions, and with slopes of 1, 2, and 3%. Measurements include flow depth and unit discharge. Turbulent boundary layer theory for a rough surface is used to describe the depth-discharge relationship, resulting in a model with a single parameter directly related to the surface roughness. Comparisons are made with Manning’s equation, and the variability of the Manning coefficient is assessed. Hydraulic effects of rainfall are generally found to be small compared to other factors.
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Acknowledgments
Research support from the Texas Department of Transportation is greatly appreciated. The following graduate students at The University of Texas at Austin contributed greatly to completion of this laboratory research program: Lauren Schneider, Julien Villard, Emily Reeder, and Wa Seong Chan.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 135 • Issue 6 • June 2009
Pages: 487 - 494
Copyright
© 2009 ASCE.
History
Received: Jun 25, 2007
Accepted: Dec 27, 2008
Published online: Feb 6, 2009
Published in print: Jun 2009
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