Monitoring Barnegat Inlet, New Jersey, South Jetty Realignment

Seabergh, William C.; Cialone, Mary A.; McCormick, John W.; Watson, Keith D.; Chasten, Monica A.

doi:10.21236/ada417600

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…Increased hydraulic efficiency can let the tide propagate past with more energy, increasing tidal range farther into the bay. Additionally, reduced frictional effects from channel deepening and straightening and the conversion from arrowhead to parallel jetties were suggested to decrease tidal damping in Barnegat Bay, New Jersey (Seabergh et al 2003). Earlier channel cross-section reduction and tidal prism reduction at Barnegat Inlet was attributed to increased frictional effects of the sand dike rerouting flow to a longer, narrower secondary channel, but tidal amplitudes were not investigated directly (Seabergh et al 2003).…”

Section: Flow Connectivity and Hydraulic Conveyance Changesmentioning

confidence: 99%

A review of tidal embayment shoaling mechanisms in the context of future wetland placement

Krafft¹,

Bain²,

Cadigan³

et al. 2022

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Wetland construction in tidally influenced embayments is a strategy for beneficial use of sediment dredged from nearby navigation channels. These projects have the potential to alter basin morphology, tidal hydrodynamics, and shoaling trends. This special report provides a broad review of the literature related to engineering-induced changes in tidal range, salinity, tidal prism, tidal asymmetry, and other known causes of shoaling. Each potential shoaling mechanism is then evaluated in the context of wetland placement to provide a foundation for future beneficial use research. Based on a compilation of worldwide examples, wetland placement may reduce tidal amplitude and enhance ebb current dominance, thus reducing shoaling rates in the channels. However, constructed wetlands could also reduce the embayment’s tidal prism and cause accelerated shoaling relative to the pre-engineered rate. Because constructed wetlands are often created in conjunction with navigation channel dredging, the system’s morphologic response to wetland construction is likely to be superimposed upon its response to channel deepening, and the net effect may vary depending on a variety of system-specific parameters. Planning for future wetland placements should include an evaluation of local hydrodynamic behavior considering these factors to predict site-specific response.

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Section: Flow Connectivity and Hydraulic Conveyance Changesmentioning

confidence: 99%

A review of tidal embayment shoaling mechanisms in the context of future wetland placement

Krafft¹,

Bain²,

Cadigan³

et al. 2022

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Improved Environmental DNA Reference Library Detects Overlooked Marine Fishes in New Jersey, United States

2020

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An accurate, comprehensive reference sequence library maximizes information gained from environmental DNA (eDNA) metabarcoding of marine fishes. Here, we used a regional checklist and early results from an ongoing eDNA time series to target mid-Atlantic U.S. coastal fishes lacking reference sequences. We obtained 60 specimens representing 31 species from NOAA trawl surveys and institutional collections, and analyzed 12S and COI barcode regions, the latter to confirm specimen identification. Combined with existing GenBank accessions, the enhanced 12S dataset covered most (74%) of 341 fishes on New Jersey State checklist including 95% of those categorized abundant or common. For eDNA time series, we collected water samples approximately twice monthly for 24 months at an ocean and a bay site in New Jersey. Metabarcoding was performed using separate 12S primer sets targeting bony and cartilaginous fishes. Bioinformatic analysis of Illumina MiSeq fastq files with the augmented library yielded exact matches for 90% of the 104 fish amplicon sequence variants generated from field samples. Newly obtained reference sequences revealed two southern U.S. species as relatively common warm season migrants: Gulf kingfish (Menticirrhus littoralis) and Brazilian cownose ray (Rhinoptera brasiliensis). A beach wrack specimen corroborated the local presence of Brazilian cownose ray. Our results highlight the value of strengthening reference libraries and demonstrate that eDNA can help detect range shifts including those of species overlooked by traditional surveys.

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Feedback between Basin Morphology and Sediment Transport at Tidal Inlets: Implications for Channel Shoaling

Krafft

Styles

Brown

2022

JMSE

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Increasing societal pressures (e.g., population growth and urbanization) are driving land use change practices in coastal areas that could potentially alter the hydrodynamics and sediment transport patterns near coastal inlets in ways that might exacerbate existing shoaling conditions. To investigate the potential impact of coastal development, a numerical model is used to predict the long-term evolution of an idealized lagoonal-type barrier island inlet under five different morphological conditions that transitioned from net sediment import to net sediment export. The simulations were designed to address the potential effect of inter-tidal placement and land reclamation on sediment transport and the resulting deposition/erosion patterns. Estuaries that were deeper and devoid of extensive tidal flats tended to promote sediment import and had a greater propensity to exacerbate channel shoaling. Simulations that were characteristic of inter-tidal placement showed net export, yet the likelihood of channel shoaling was increased because some of the material eroded from the tidal flats was deposited in the deeper channels as opposed to being carried out the inlet throat. Alternatively, it was found that regions in which the intertidal area was restricted to elevations higher in the tidal frame, which also showed a net export, produced greater sediment loss in the inter-tidal zone that tended to bypass the deeper sections, reducing the likelihood of channel shoaling.

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Monitoring Barnegat Inlet, New Jersey, South Jetty Realignment

Cited by 3 publications

References 9 publications

A review of tidal embayment shoaling mechanisms in the context of future wetland placement

A review of tidal embayment shoaling mechanisms in the context of future wetland placement

Improved Environmental DNA Reference Library Detects Overlooked Marine Fishes in New Jersey, United States

Feedback between Basin Morphology and Sediment Transport at Tidal Inlets: Implications for Channel Shoaling

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