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dc.descriptionPeláez-Zapata, D.S.; Montoya, R.D., and Osorio, A.F., 2018. Numerical study of run-up oscillations over fringing reefs. This work presents a numerical study of run-up oscillations over a typical fringing reef profile at the laboratory scale. The nonhydrostatic SWASH model was calibrated and validated using experimental data of free surface elevation for eight gauges and run-up oscillations. The model shows a high sensitivity to variations in the parameters of bottom friction and horizontal mixing length. A process of calibration found the optimal values to be 0.014 s m-1/3 and 0.01 m, respectively. With these values, the model is good at reproducing bulk run-up parameters such as the mean run-up period (r2 = 0.93), sea-swell significant run-up (r2 = 0.93), and infragravity significant run-up (r2 = 0.88). The ratio between the infragravity and sea-swell run-up is highly dependent on the surf similarity parameter. For dissipative and intermediate conditions, the run-up is mainly dominated by low-frequency or infragravity oscillations, whereas for reflective conditions, high-frequency or sea-swell oscillations become more important. The results show that the run-up spectrum at high frequencies is proportional to f-4. The energy level at high frequencies is apparently independent of the offshore wave conditions and the width of the reef flat. However, the depth of the reef crest seems to be the most influential variable on the high-frequency energy. A parametric equation that depends on both the energy level at high frequency and a function of the run-up period was obtained to analyze the spectral characteristics of the wave run-up. This equation can be considered a first approach to a general parameterization of the run-up spectrum for reef zones, which can be useful in coastal engineering applications, such as predicting both the run-up height and frequency, spectral response of sediment transport in the swash zone, and coupling with spectral wave models. © Coastal Education and Research Foundation, Inc.
dc.publisherCoastal Education Research Foundation
dc.subjectnumerical modelingspa
dc.subjectrun-up spectrumspa
dc.subjectSWASH modelspa
dc.subjectWave run-upspa
dc.titleNumerical study of run-up oscillations over fringing reefsspa
dc.publisher.programIngeniería Civilspa
dc.contributor.affiliationPeláez-Zapata, D.S., Universidad Nacional de Colombia;Montoya, R.D., Universidad Nacional de Colombia; Universidad de Medellín;Osorio, A.F., Universidad Nacional de Colombiaspa
dc.publisher.facultyFacultad de Ingenieríasspa
dc.relation.ispartofesJournal of Coastal Researchspa
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