Earthen Levee Shear Stress Estimates for Combined Wave Overtopping and Surge Overflow
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 138, Issue 3
Abstract
A total of 25 small-scale laboratory experiments simulating combined wave overtopping and storm-surge overflow on a trapezoidal levee were conducted at a nominal prototype-to-model scale of . Time series measurements of irregular and unsteady flow thickness and velocity were acquired at two locations on the landward-side, slope. These measurements were used to calculate the time series of instantaneous shear stress representing the average over a 4.8-m-long (prototype scale) levee slope between the two measurement locations. Empirical relationships are presented for estimating the mean shear stresses for steady overflow and for combined wave and surge overtopping. For the latter case, additional formulas are given for estimating representative parameters of the irregular shear stress peaks associated with individual overtopping waves. The collected data were intended primarily for the design of rapidly deployable levee armoring systems; however, the data could also be used to evaluate the erosion of soil or vegetated levees and dikes.
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Acknowledgments
The research described and the results presented in this paper, unless otherwise noted, were obtained with support from the research project titled “Increasing Community Disaster Resilience Through Targeted Strengthening of Critical Infrastructure at Mississippi State University,” under project number 70015 and principal investigator Isaac L. Howard. This research was funded by the Department of Homeland Security, which sponsored the Southeast Region Research Initiative (SERRI) at the Department of Energy’s Oak Ridge National Laboratory. Permission was granted by Headquarters, U.S. Army Corps of Engineers, to publish this information. Special thanks to Hugh Acuff, Julie Cohen, and Tim Nisley for their careful and critical support of the laboratory experiments.
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Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 138 • Issue 3 • May 2012
Pages: 267 - 273
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jan 31, 2011
Accepted: Oct 12, 2011
Published online: Oct 14, 2011
Published in print: May 1, 2012
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