Strategic placement of mixed sediment in the form of a nearshore berm along Fort Myers Beach, Florida

Brutsch, Katherine E; Pollock, Cheryl E.

doi:10.21079/11681/21616

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…USACE began constructing underwater berms in the mid-1930s with a 152,911m 3 berm off Santa Barbara, California in 6.1 m of water (Richardson 1988). Fine-grained material has typically been limited to the construction of stable berms in deep water (Williams and Prickett 1998), but recent work has shown that mixed material (sands, silts, and clays) can be strategically placed as feeder berms in nearshore applications, which are considered relatively higher energy environments (Brutsché and Pollock 2017). Additional benefits of dredged material berms that stabilize and isolate contaminated sediment deposits include reduced long-term environmental liability associated with contaminated storage in USACE owned CDFs, reduced exposure of aquatic habitat to contaminants, and dredged material associated with USACE operations and maintenance being suitable for beneficially use.…”

Section: Introductionmentioning

confidence: 99%

Application of clean dredged material to facilitate contaminated sediment source control

Moore¹,

Acevedo-Acevedo²,

Gidley³

2022

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Navigation channels, turning basins, and other US Army Corps of Engineers (USACE)–managed navigation infrastructure often serve as repositories for contaminated sediment from off-site sources. As much as 10% of the material that USACE dredges on an annual basis is contaminated such that it requires additional and more costly management (for example, rehandling and placement in managed confined disposal facilities). Presence of contaminated sediments constrain potential management options resulting in additional costs and opportunity loss from the inability to beneficially use the material. One potential solution is applying clean dredged material to stabilize and isolate contaminated sediment sources, preventing further transport and introduction to USACE-managed infrastructure. This document summarizes a comprehensive literature review of laboratory and field case studies relevant to using clean dredged material to isolate or stabilize contaminated sediments, focusing on the physical, chemical, and biological parameters critical to establishing its feasibility and long-term effectiveness. Potentially effective engineering control measures were also reviewed where erosion and site hydrodynamics are facilitating the transport of contaminated sediments to USACE-maintained navigation infrastructure. This literature review documents and summarizes those factors considered in establishing feasibility and long-term effectiveness of the approach as well as the applicable engineering tools employed and constraints encountered.

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Section: Introductionmentioning

confidence: 99%

Application of clean dredged material to facilitate contaminated sediment source control

Moore¹,

Acevedo-Acevedo²,

Gidley³

2022

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Impacts of Hurricane Ian along the Low-Lying Southwest Florida Coast (USA) in 2022: Lessons Learned

Wang,

Royer,

Jackson

et al. 2024

Journal of Coastal Research

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Sediment Transport and Morphological Response to Nearshore Nourishment Projects on Wave-Dominated Coasts

Johnson

McFall

Krafft

et al. 2021

JMSE

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Nearshore nourishments are constructed for shoreline protection from waves, to provide sediment nourishment to the beach profile, and to beneficially use dredged sediment from navigation channel maintenance. However, it is poorly understood how placement morphology and depth influence nearshore processes operated on wave-dominated coasts. This study investigates the wave fields, sediment transport, and morphological response to three common nearshore nourishment shapes, nearshore berm (elongated bar), undulated nearshore berm, and small discrete mounds, with numerical experiments utilizing the Coastal Modeling System. The nourishments are placed in depths between 3 m and 7 m with a volume of approximately 100,000 m3 and between 400 m and 1000 m in alongshore length. Numerical experiments are carried out in three distinct coastal settings with representative wave climates and geomorphology. Simulation results indicate that shallower, more continuous berms attenuate the most wave energy, while deeper, more diffuse placements retain more sediment. Results from this study improve the understanding of nearshore nourishment shapes and can support decision makers identifying the most appropriate construction technique for future nearshore nourishment projects.

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Strategic placement of mixed sediment in the form of a nearshore berm along Fort Myers Beach, Florida

Cited by 3 publications

References 4 publications

Application of clean dredged material to facilitate contaminated sediment source control

Application of clean dredged material to facilitate contaminated sediment source control

Impacts of Hurricane Ian along the Low-Lying Southwest Florida Coast (USA) in 2022: Lessons Learned

Sediment Transport and Morphological Response to Nearshore Nourishment Projects on Wave-Dominated Coasts

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