Coastal Structures and Solutions to Coastal Disasters Joint Conference 2015
Evaluation of Berm Shape for Wave Energy Reduction in Restored Tidal Wetlands
Publication: Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities
ABSTRACT
This study assesses the effectiveness of linear berms versus circular mounds to reduce wave height for wetland restoration. The Hamilton Wetlands are modeled using the phase-average spectral wave model STWAVE. The model is first validated with field data. The model results show that the berms are approximately twice as effective in attenuating the wave height as circular mounds of approximately the same volume. The presence of vegetation on the berms and mounds increases wave attenuation as long as the water depth is sufficient to submerge the vegetation. Because the circular mounds have more vegetated area, the vegetation induces greater additional attenuation for the mounds than the berms. Berms provide a longer extent of high crest elevations for the same volume of sediment compared to mounds, so are in general more effective in attenuating waves.
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ACKNOWLEDGEMENTS
This work was supported by the Corps of Engineers Engineering with Nature and Flood and Coastal Research Programs. Permission to publish has been granted by the Chief of Engineering, US Army Corps of Engineers.
REFERENCES
Anderson, M. E. and J. M. Smith. (2014). “Wave attenuation by flexible, idealized salt marsh vegetation.” Coastal Engineering 83(0): 82-92.
Hanak, E., J. Lund, A. Dinar, B. Gray, R. Howitt, J. Mount, P. Moyle, and B. Thompson. (2011). “Managing California’s water: from conflict to reconciliation.” Public Policy Inst. of California, San Francisco, CA, 501p.
Goals Project. (1999). “Baylands Ecosystem Habitat Goals.” A report of habitat recommendations prepared by the San Francisco Bay Area Wetlands Ecosystem Goals Project. U.S. Environmental Protection Agency, San Francisco, CA/S.F. Bay Regional Water Quality Control Board, Oakland, CA, 209p.
Massey, T. C., M. E. Anderson, J. M. Smith, J. Gomez, and R. Jones (2011). “STWAVE: Steady-State Spectral Wave Model, Version.6.0.” ERDC/CHL-SR-11-1. U.S Army ERDC, Vicksburg, MS.
Mendez, F. J., and I. J. Losada (2004). “An empirical model to estimate the propagation of random breaking and nonbreaking waves over vegetation fields.” Coastal Engineering 51: 103-118.
Northwest Hydraulic Consultants. (2011). “North San Francisco FEMA Mapping Vegetation Parameters for WHAFIS Modeling.” Technical memorandum, dated October 24, 2011.
Smith, J. M. (2007). “Full-plane STWAVE with bottom friction,” ERDC/CHL CHETN-I-75, US Army ERDC, Vicksburg, MS, 15 pp.
USACE San Francisco District and California State Coastal Conservancy. (2003). “Bel Marin Keys unit V expansion of the Hamilton Wetland Restoration Project,” Final General Reevaluation Report, www.coastalconservancey.ca.gov/belmarin.
Information & Authors
Information
Published In
Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities
Pages: 451 - 462
Editors: Louise Wallendorf, U.S. Naval Academy and Daniel T. Cox, Ph.D., Oregon State University
ISBN (Online): 978-0-7844-8030-4
Copyright
© 2017 American Society of Civil Engineers.
History
Published online: Jul 11, 2017
Published in print: Jul 11, 2017
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