Numerical modelling to assess maintenance strategy management options for a small tidal inlet

Shaeri, Saeed; Tomlinson, Rodger Benson; Etemad‐Shahidi, Amir; Strauss, Darrell

doi:10.1016/j.ecss.2017.01.017

Cited by 16 publications

(9 citation statements)

References 42 publications

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“…The calibrated model [34] was able to reproduce the natural (i.e., no-dredging operations) evolution of the inlet concerning the submerged sandbar (Figures 4, and 5a) and the respective infilling of the sedimentation basin after dredging operations ( Figure S1). The suitability of this model for this kind of study has also been reported in other tidal inlets (e.g., in [14,19,20,49]).…”

Section: Discussionsupporting

confidence: 63%

“…The dredging operations modify sediment transport pathways [14,19,20,51]. Fernández-Fernández et al [51] highlighted that total sediment transport fluxes decreased inside the dredged area, enhancing the accretion processes in this area.…”

Section: Discussionmentioning

confidence: 99%

“…The mean wave energy power of this period was 45 kW·m −1 , corresponding to a medium wave energy year, and the accumulated wave energy power was 128,000 kW·m −1 . Furthermore, the selection of the period of the year to perform the dredging operations (i.e., period of low or high wave energies) appears to be crucial for their lifetime as highlighted by [20,32].…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, regular dredging operations performed to enhance navigation entail a significant annual budget that is difficult to assure permanently and thus, dredging optimization is highly encouraged. Hence, numerical models have been developed and implemented to delve into the impact of these solutions in different coastal regions around the world (e.g., in [18][19][20]).…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Dredging Scenarios for a Tidal Inlet in a High-Energy Coast

Fernández-Fernández

Ferreira

Silva

et al. 2019

JMSE

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The high energetic wave climate of the North Atlantic Ocean causes important morphological changes at Figueira da Foz coastal system (W Portugal), which is comprised of sandy beaches and the Mondego estuary-inlet. The submerged sandbar at the inlet mouth is highly dynamic inducing short waves shoaling and breaking processes that can entail navigation problems towards the local harbor. Therefore, coastal dredging operations are performed to guarantee safe navigation. Nevertheless, these operations have a limited temporal effectiveness and require a high annual budget to be accomplished. The goal of this research is to seek long-life dredging alternatives using modeling tools (i.e., Delft3D model suite). Delft3D model is used to simulate the morphological evolution of five dredging scenarios during a three-month winter period under three wave climate scenarios. The bed level differences at the dredged area and at the inlet mouth for each scenario are analyzed in comparison with numerical solutions obtained in a reference scenario (i.e., no-dredging). Results highlight morphological changes at the dredged inlet and surrounding areas and their effectiveness in extending the operational lifetime of inlet dredged operations on dredging configuration and wave climate conditions. These findings are the basis for selecting the most suitable dredging scenario to this coastal region under current wave climate conditions.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of Dredging Scenarios for a Tidal Inlet in a High-Energy Coast

Fernández-Fernández

Ferreira

Silva

et al. 2019

JMSE

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“…While these simplified methods are convenient and provide some insight to the processes governing inlet stability, quantitative comparison of proposed anthropogenic activities (e.g., construction of erosion control structures or dredging operations) using these approaches is often not possible. Therefore, process-based models are often used to investigate both the processes driving sedimentation [12][13][14] and the potential impact of structural and non-structural inlet management alternatives [15][16][17][18][19]. Often, these studies have focused on larger open coast inlets.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Channel Shoaling at a Sheltered Inlet Subject to Flood Gate Operations

Lemke

Janssen

Miller

2020

JMSE

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A comprehensive case study of Keansburg Inlet (New Jersey, USA) is presented with the objective of evaluating inlet management alternatives and assessing the influence of an operational flood gate on channel shoaling. The goal of the research is determining the most effective strategy for minimizing the frequency of maintenance dredging. This study compares the effectiveness of (1) traditional structural solutions; (2) modified dredging templates; and (3) assesses the influence of the flood gate operations during conditions representative of a typical year. Alternative analysis is completed using a coupled hydrodynamic–wave model (Delft3D-Flexible Mesh (FM)) with Real Time Control to simulate morphological changes. The model was calibrated and evaluated using collected field data. Water levels are reproduced within 6% of the spring tide range with lag times less than 20 min. The model results and observations suggest sediment transport is dominated by wave action with pronounced variations in dominant wave direction. The results indicate that changes to the operational dredging, or what the authors have termed broadly as “adaptive dredging techniques”, appear to deliver the most promising improvement. Model results suggest that the current operational procedures of the flood gate do not significantly alter the channel infilling rates and patterns during typical (i.e., non-extreme event) conditions.

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