Numerical investigation of effects of artificial excavation pit on transformation and runup processes of tsunami-like wave over fringing reef

Qu, Keqing; Huang, J. X.; Yao, Yu; Guo, L.; Wang, X.; Li, X.H.; Jiang, Chang Bo

doi:10.1016/j.oceaneng.2022.113553

Cited by 4 publications

(2 citation statements)

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“…Wang et al [43] investigated the propagation and deformation processes of waves at complex coastlines using a potential flow model. By utilizing a non-hydrostatic wave model [44,45], a two-phase wave model [46], and a smoothed particle hydrodynamics model (SPH) [47], the researchers extensively discussed the influences of the main factors, i.e., wave height, wave period, water depth, and reef configurations, etc., on the hydrodynamics of fringing reefs [45][46][47]. Recently, the influences of onshore wind [48] and the permeability of reef flats [49] on the wave hydrodynamics of fringing reefs were also numerically investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Klaver et al [53] carried out research along similar lines and used the non-hydrostatic wave model XBeach. The impacts of artificial pits on the wave transformation and wave-breaking processes of tsunami-like waves on fringing reefs were recently numerically studied by Qu et al [46]. According to their findings, the existence of a pit can both effectively lower the wave runup height at the backreef slope and also somewhat enhance the wave height around the pit.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Excavation Pits on the Wave Hydrodynamics of Fringing Reefs under Regular Waves

Wang

Men

et al. 2023

JMSE

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Dredging materials from reef flats have become an important source of sand and aggregates for meeting the infrastructure needs of coral-lined shores in subtropical and tropical regions, especially for low-lying atoll islands. Dredging at the reef flats can generate artificial excavation pits, which not only have profound influences on coral ecological stability but also deeply affect the hydrodynamic characteristics of coral reefs. To deepen the understanding of the influence of excavation on the wave hydrodynamics of fringing reefs, the wave propagation, wave transformation, wave setup, and wave runup processes of regular waves on fringing reefs with artificial pits have been systematically analyzed using a non-hydrostatic numerical wave solver (NHWAVE). The effects of some significant factors have been carefully investigated. According to the study findings, the existence of artificial pits can result in a slight decrease in the wave height around the artificial pit. The time-mean maximum of wave runup height at the backreef slope can be reduced to some extent when the artificial pit is present. When placed close to the reef edge, the artificial pit can have noticeable effects on the hydrodynamic characteristics of fringing reefs, particularly the wave setup along the reef flat. It is hoped that the study findings can provide further reference for evaluation of the influences of artificial pits on the wave hydrodynamics of fringing reefs.

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