Análisis de los efectos de la interacción ola-corriente en la modelación espectral del oleaje durante condiciones extremas de huracán
Understanding the behavior of extreme waves during hurricane wind conditions allows the design and operation of marine structures (ports and offshore structures) and predicts potentially dangerous conditions for coastal regions (erosion and flooding). For this, it is crucial to consider the interact...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión actualizada desde la publicación |
| Fecha de publicación: | 2020 |
| País: | Colombia |
| Institución: | Universidad Nacional de Colombia |
| Repositorio: | Repositorio UN |
| Idioma: | español |
| OAI Identifier: | oai:repositorio.unal.edu.co:unal/79176 |
| Acceso en línea: | https://repositorio.unal.edu.co/handle/unal/79176 |
| Access Level: | acceso abierto |
| Palabra clave: | 620 - Ingeniería y operaciones afines::627 - Ingeniería hidráulica Oleaje extremo Vientos extremos Interacción ola-corriente Espectros de energía Huracanes Modelación espectral Hurricane Waves Directional Spectrum Hurricane Winds Wave-Current interaction Spectral modeling WaveWatch III |
| Sumario: | Understanding the behavior of extreme waves during hurricane wind conditions allows the design and operation of marine structures (ports and offshore structures) and predicts potentially dangerous conditions for coastal regions (erosion and flooding). For this, it is crucial to consider the interaction of the atmospheric and oceanic components in the spectral modeling of the waves and thus characterize the behavior of the waves in weak and extreme wind conditions. Traditionally, physical parameterizations and computational methods have been used to estimate scalar parameters and wave energy spectra. However, the need for greater precision in the results for practical purposes has resulted in the development of methods that use the full spectrum of energy, that is, also taking into account the vector character of the waves, also called directional spectrum. This is important for engineering applications when considering parameters such as significant wave height (Hs) and peak period (Tp) that can lead to significant errors, so it is important to analyze the behavior of energy spectra. In this thesis, the results of the spectral modeling of hurricanes Katrina and Rita are presented, considering the effect of the wave-current interaction. The simulations are carried out with the WAVEWATCH III R (WWIII) wave model. The hurricane wind field is obtained by combining information from the NARR re-analysis database and the parametric hurricane wind model HURWIN, a combination known as HURNARR. Two scenarios are analyzed, using surface currents from AVISO's satellite measurements and integrating the effect of the current speed field obtained from the GLORYS database. In particular, this thesis studies the effect of the wave-current interaction on the spatio-temporal variability of the scalar parameters of significant wave height (Hs), peak period (Tp), and peak wave direction (θp). The variability of the source and sink terms S (f) and the changes in the scalar frequency spectrum E (f) and the directional energy spectrum E (f; θ) are analyzed. In addition, a methodology is proposed to quantify the effect of the 3D current velocity field in the calculation of wave energy parameters and spectra during extreme wind conditions. The study area is the Gulf of Mexico, located in the southeastern corner of North America and northeast of Central America, between approximately 18◦ N and 31◦ N and 79◦ W and 98◦ W. Simulations in extreme wind conditions are performed considering the passage of Hurricanes Katrina and Rita in August and September 2005, respectively. In order to validate the results of the model using the proposed methodology, the results of the spectral modeling are compared with the information available from the measurements of buoys 42001, 42002, 42036, 42038, 42039 and 42040 of the National Oceanic and Atmospheric Administration (NOAA). ). The results obtained show that there is a more adequate estimate of the scalar parameters and wave energy spectra when considering the effect of the wave interaction with surface and deep currents. The conclusions of this thesis suggest that the results obtained here may help in the adequate design of marine structures and in the prevention of disasters caused by hurricanes. |
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