Please send comments or suggestions on accessibility to the site editor. The College of Earth and Mineral Sciences is committed to making its websites accessible to all users, and welcomes comments or suggestions on access improvements. This courseware module is part of Penn State's College of Earth and Mineral Sciences' OER Initiative.Įxcept where otherwise noted, content on this site is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Learning Designer: April Millet, The Pennsylvania State University Team Lead: Tim Bralower, Professor, The Pennsylvania State University. Hanegan, Research Assistant University of New Orleans, Li-San Hung, Research Assistant The Pennsylvania State University, Mark Kulp, Associate Professor University of New Orleans, Diane Maygarden, Research Associate University of New Orleans, David Retchless, Research Assistant The Pennsylvania State University, and Brent Yarnal, Professor The Pennsylvania State University, Tim Bralower, Professor The Pennsylvania State University. Two breakwaters were constructed in 1989 to protect the shoreline in front of the Solymar hotel and five detached breakwaters were implanted between 19 for the protection of the zone of the Soliman Beach from shoreline retreat. Breakwaters can also be constructed with one end linked to the shore, in which case they are usually classified as sea walls.Īuthors: Sean Cornell, Associate Professor Shippensburg University of Pennsylvania, Duncan Fitzgerald, Professor Boston University, Nathan Frey, Research Assistant The Pennsylvania State University, Ioannis Georgiou, Associate Professor, University of New Orleans, Kevin C. Once formed, there is a positive feedback: the pockets will cause wave refraction, which helps to stabilize the pocket-shaped coastline. Design levels of overtopping discharges frequently vary, from heavy overtopping of detached breakwaters and outer breakwaters without access roads, Training Course on Coastal Engineering & Coastal Zone Management Design & Construction Of Coastal Structures by A.V.
Detached breakwaters series#
The nearshore wave pattern, which is strongly influenced by diffraction* at the heads of the structures, will cause salients and sometimes tombolos to be formed, thus producing a shoreline similar to a series of pocket beaches. Beach material transported along the beach moves into the sheltered area behind the breakwater where it is deposited in the lower wave energy region. Each breakwater reflects and dissipates some of the incoming wave energy, thus reducing wave heights in the lee of the structure, interrupting transport along the shore, and reducing shore erosion. The gaps between the breakwaters are in most cases on the same order of magnitude as the length of one individual structure. Multiple detached breakwaters spaced along the shoreline can provide protection to substantial shoreline frontages. They are built parallel to the shore just seaward of the shoreline in shallow water depths, using solid concrete structures, piles of stone/concrete blocks, or rubble mound. Detached breakwaters are small, relatively short, non-shore-connected nearshore breakwaters with the principal function of reducing beach erosion.
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