TRIADS: A phase-resolving model for nonlinear shoaling of directional wave spectra

Sheremet, A.; Davis, Justin R.; Tian, Miao; Hanson, Jeffrey L.; Hathaway, Kent K.

doi:10.1016/j.ocemod.2016.01.002

Cited by 16 publications

(10 citation statements)

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“…The model is an extension of unidirectional models proposed for the first time for shallow water [17] and later recast [18] in a uniformly-valid formulation for arbitrary depth using the mild-slope equation. The current numerical implementation of the TRIADS model [19] has been widely described and applied [20]. In the simulation results ( Figure 5), the beach was assumed to be cylindrical (laterally uniform) and mildly sloping in the cross-shore direction.…”

Section: Triads Sample Computation Of the Generation Of Ig From The Lmentioning

confidence: 99%

Wave-Current Interactions and Infragravity Wave Propagation at a Microtidal Inlet

et al. 2018

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Recent studies have shown that wave blocking occurs at river mouths with strong currents typically preventing relatively short period sea and swell waves from propagating up the river. However, observations demonstrate that lower frequency waves, so-called infragravity waves, do pass through and propagate up the river, particularly during storm events. We present observations from the Misa River estuary of infragravity wave propagation up the river during storm conditions. A model of the complex nonlinear interactions that drive infragravity waves is presented. The results are discussed in the context of an observed river mouth bar formed in the lower reach of the Misa River.

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Section: Triads Sample Computation Of the Generation Of Ig From The Lmentioning

confidence: 99%

Wave-Current Interactions and Infragravity Wave Propagation at a Microtidal Inlet

et al. 2018

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“…For this endeavor, we couple the TRIADS model by Sheremet et al . [, and references therein] with boulder‐dislodgement model by Weiss and Diplas [, hereafter referred to as BoDiMo for boulder‐dislodgement model]. Due to the characteristics of the TRIADS model (see sections 2.2 and 2.4), the coupling between TRIADS and BoDiMo constitutes an important step toward a new paradigm for the use of deposits in hazard assessments integrated stochastic processes provide a mathematically consistent framework.…”

Section: Introductionmentioning

confidence: 99%

Toward a new paradigm for boulder dislodgement during storms

Weiss

Sheremet

2017

Geochem Geophys Geosyst

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Boulders are an important coastal hazard event deposit because they can only be moved by tsunamis and energetic storms effects of storms. Storms and tsunami are competing processes for coastal change along many shorelines. Therefore, distinguishing the boulders that were moved during a storm from those moved by a tsunami is important. In this contribution, we present the results of a parameter study based on the TRIADS model for wave shoaling on mildly sloping beaches, coupled with a boulder‐dislodgement model that is based on Newton's Second Law of Motion. The results show how smaller slopes expose the waves longer to the nonlinear processes, thus increasing the energy in the infragravity wave band. More energy in the infragravity wave band means that there are more energy wave lengths that can dislodge larger boulders. At the same time, a steeper slope lowers the threshold for boulder dislodgement (critical angle of dislodgement), making it more likely for larger boulders to be dislodged on a steeper slope. The competition between these two processes govern boulder dislodgement during storms and is investigated inhere.

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“…Different types of approaches and numerical models have been considered to numerically model the generation and propagation of infragravity waves. Two main approaches or types of models can be distinguished: (1) phase‐resolving [e.g., Herbers et al ., ; Madsen et al ., ; Kennedy et al ., ; Torres‐Freyermuth et al ., ; Bonneton et al ., ; Zijlema et al ., ; Ma et al ., ; Ruju et al ., ; Rijnsdorp et al ., ; Sheremet et al ., ] and (2) phase‐averaged models [e.g., Reniers et al ., ; Uchiyama and McWilliams , ; Long and Özkan‐Haller , ; Roelvink et al ., ; Eldeberky , ]. Phase‐resolving models account for the nonlinear gravity wave transformations and possible nonlinear energy transfer from the IG band to the gravity band.…”

Section: Introductionmentioning

confidence: 99%

Relevance of infragravity waves in a wave‐dominated inlet

Bertin

Olabarrieta

2016

JGR Oceans

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This study investigates the relevance of infragravity (IG) waves at Albufeira Lagoon Inlet, a shallow wave‐dominated inlet located on the western coast of Portugal. A field experiment carried out in September 2010 revealed the occurrence of low‐frequency oscillations (i.e., 25–300 s) in water levels and current velocities. While these fluctuations were present over the ebb‐tidal delta along the whole tidal cycle, they only appeared between the beginning of the flood and up to 2 h after high tide inside the lagoon. The XBeach modeling system was applied to Albufeira Lagoon Inlet and reproduced the generation and propagation of IG waves and their blocking during the ebb. This behavior was explained by blocking due to opposing tidal currents reaching 2.5 m s−1 in shallow water depths. Numerical results suggest that the breakpoint mechanism and the long bound wave shoaling mechanisms contributed significantly to the generation of IG waves in the inlet. IG waves induced fluctuations in flood currents inside the lagoon reaching temporarily 100% of their magnitude. The fact that these fluctuations occur mostly at flood and not at ebb could promote flood dominance in the lagoon. This hypothesis will have to be verified, namely under storm wave conditions.

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TRIADS: A phase-resolving model for nonlinear shoaling of directional wave spectra

Abstract: 2016-11-03T14:11:40

Cited by 16 publications

References 50 publications

Wave-Current Interactions and Infragravity Wave Propagation at a Microtidal Inlet

Wave-Current Interactions and Infragravity Wave Propagation at a Microtidal Inlet

Toward a new paradigm for boulder dislodgement during storms

Relevance of infragravity waves in a wave‐dominated inlet

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