PILE FENCE TO ENHANCE DUNE RESILIENCY

Rebecca Quan; Nobuhisa Kobayashi; Berna Ayat

doi:10.9753/icce.v34.sediment.15

No. 34 (2014), Sediment Transport and Morphology

No. 34 (2014)

PILE FENCE TO ENHANCE DUNE RESILIENCY

Sediment Transport and Morphology

Published 2014-10-02

Rebecca Quan⁺⁻
Nobuhisa Kobayashi⁺⁻
Berna Ayat⁺⁻

Rebecca Quan

University of Delaware

Nobuhisa Kobayashi

University of Delaware

Berna Ayat

Yildiz Technical University

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Keywords

pile fence
wave overtopping
dune
erosion
overwash
sediment transport

How to Cite

PILE FENCE TO ENHANCE DUNE RESILIENCY. (2014). Coastal Engineering Proceedings, 1(34), sediment.15. https://doi.org/10.9753/icce.v34.sediment.15

Abstract

A beach with a berm and dune provides storm protection but wave overtopping and overwash of the dune may lead to dune breaching and inundation. Dune erosion and overwash may be reduced by piles placed linearly along the toe of the dune. This study will explore whether piles can be used to make dunes more resilient against storm surge and waves. Six laboratory tests were conducted to observe the effect of pile fence porosity, location and pile toppling. It is recommended that a pile fence porosity of 0.5 or less be used to obtain significant increase in dune resiliency. Presence of the pile fence may increase offshore sediment transport resulting in more deposition in the surf zone. The pile fence should be placed near the dune toe to reduce wave uprush on the dune foreslope and to minimize pile toppling due to wave action.

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References

Ayat, B. and Kobayashi, N. (2014). "Vertical cylinder density and toppling effects on dune erosion and overwash.† J. Waterway, Port, Coastal, Ocean Eng. (in press).

Figlus, J., Kobayashi, N., Gralher, C., and Iranzo, V. (2011). "Wave overtopping and overwash of dunes.† J. Waterway, Port, Coastal, Ocean Eng., 137(1), 26-33.

Gralher, C., Kobayashi, N., and Do, K. (2012). "Wave overwash of vegetated dunes.† Proc. 33rd Coastal Engineering Conf., Sediments 34, 1-7, http://journals.tdl.org/ICCE.

Isaacson, M., Premasiri, S., and Yang, G. (1998). "Wave interactions with vertical slotted barrier.† J. Waterway, Port, Coastal and Ocean Eng., 124(3), 118-126.

Raudkivi, A.J. (1996). "Permeable pile groins.† J. Waterway, Port, Coastal and Ocean Eng., 122(6), 267-272.

Reedijk, B. and Muttray, M. (2007). "Pile row breakwaters at Langkawi, Malaysia, 10 years of beach development†, Proc. Coastal Structures 2007, World Scientific, Singapore, 562-573.

U.S. Army Corps of Engineers. (2002). Coastal Engineering Manual. Engineer Manual 1110-2-1100, U.S. Army Corps of Engineers, Washington, D.C.

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PILE FENCE TO ENHANCE DUNE RESILIENCY

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