Preprint Article Version 1 This version is not peer-reviewed

Shoreline Stabilization with Experimental Groin Field(s): Modular Adjustable Permeable Groins

Version 1 : Received: 12 October 2018 / Approved: 16 October 2018 / Online: 16 October 2018 (11:05:45 CEST)

How to cite: De Gennaro, N.; Gable, F. Shoreline Stabilization with Experimental Groin Field(s): Modular Adjustable Permeable Groins. Preprints 2018, 2018100352 (doi: 10.20944/preprints201810.0352.v1). De Gennaro, N.; Gable, F. Shoreline Stabilization with Experimental Groin Field(s): Modular Adjustable Permeable Groins. Preprints 2018, 2018100352 (doi: 10.20944/preprints201810.0352.v1).

Abstract

This manuscript introduces prospective hard engineering solutions to continuous episodic erosional events on beaches utilized for recreation and tourism. The basis of this paper is information from a modeling study completed in 2011 on a two mile stretch of beach in South Carolina. The study utilized three alternative groin systems and a no groin option. The optimum spacing of the groin applications and the retention rate of a replenished beach at the location was determined based on running a computer model (Genesis) for the environmental conditions (wave climate, littoral transport, etc.) at the demonstration site. It was also determined that the innovative groin alternative presented in this paper would likely develop as the most effective cost/benefit relationship among the more conventional alternatives utilized in the United States. The experimental groin system (modular adjustable permeable groin(s) MAPG) was calculated to save initial construction costs by 25% to 30%as compared to the other alternatives. This was significant when considering that adjacent beach impacts are minimized and the beach berm is better protected over the typical beach re-nourishment cycle. This paper attempts to facilitate further discussion of regional sediment budget and (coastal zone) management by bridging the divide between choosing only sand nourishment vs. engineered structures. We demonstrate that reintroducing engineered structures in combination with beach nourishment can be a cost effective solution to episodic erosional events over time while allowing longshore sediment transport.

Subject Areas

coastal erosion; beach renourishment; articulated concrete mat; piles; littoral transport

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