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ocean waves

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  • MS Plan B Defense: Extreme wave height estimation from a global wave hindcast ensemble

    Zoom Meeting ID______ 947 5656 0724 Passcode: ORE

    Andi Erickson Graduate Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa Across the oceans, strong storms generate powerful waves that impact human activities such as commerce and design of coastal and offshore structures. To mitigate damages to these activities and to properly design infrastructures, it is imperative to understand the extreme wave climate. Previous works typically use a single dataset to describe the extreme wave climate. Here we analyze a comprehensive ensemble of 11 wave hindcasts most covering 30 years (1979-2016) to estimate extreme wave conditions at a commonly used return period of 100 years. To

  • MS Plan B Defense: Modeling of hurricane waves for design of coastal infrastructure

    Zoom Meeting ID______ 853 4276 3602 Passcode: U7H0uX

    Giannicola Tumino Di Costanzo Graduate Student Department of Ocean and Resources Engineering University of Hawaiʻi at Mānoa The subtropical Hawaiian Islands are subject to occasional hurricanes that bring the risk of infrastructure damage and financial loss. Determination of hurricane wave conditions in terms of return period is important for coastal infrastructure design and risk management. This study assembles and validates a hurricane wave model and utilizes the model to determine probabilistic design wave conditions for a study site at west Maui. The Delft3D software, which includes a parametric hurricane model and SWAN (Simulating Waves Nearshore), is used to determine significant

  • MS Plan A Defense: Morphodynamic changes due to calm-moderate wave forcing: A case study of Waikiki Beach

    Zoom Meeting ID______ 999 8388 9554 Passcode: ORE

    Julianne Kalksma Graduate Student Department of Ocean and Resources Engineering University of Hawaiʻi at Mānoa Sea level rise, erosion, and the wave climate influence Waikiki Beach on the South Shore of Oahu which is a popular beach in metropolitan Honolulu. In response to recent erosion events and ongoing beach nourishments, weekly surveys have been collected for the past 3 years, from April 2018 through December 2020, to better understand coastal morphology. Local studies found detailed two-dimensional morphological structures; however, no direct relationships between the offshore driving ocean conditions and Waikiki Beach have been established. Other previous works relate the wave

  • Seminar: Tsunami Generation Mechanism of Historical Hawaii Local Tsunamis

    Zoom Meeting ID______ 935 9608 7383 Passcode: OREseminar

    Dr. Yoshiki Yamazaki Assistant Researcher Department of Ocean & Resources Engineering University of Hawai’i at Mānoa   The 4 May 2018 MW  6.9 earthquake offshore of Kilauea Volcano at Hawaii Island has raised concern to emergency management agencies in Hawaii because of locally generated tsunami’s short arrival time and unpredictable amplitude along the Hawaiian Islands. Fortunately, the tsunami impact of the 2018 MW  6.9 earthquake was moderate over the entire Hawaii island chain. However, Hawaii experienced two larger earthquakes in recorded history, the 1975 MW  7.7 Kalapana and 1868 M ~7.9 Ka`u earthquakes at the south flank of Hawaii Island.

  • Seminar: ORE203 Surf Science and Culture – A holistic approach to STEM education

    Watanabe 112 2505 Correa Rd, Honolulu, HI, United States

    Dr. Justin E. Stopa, Assistant Professor Dr. Ellen Briggs, Assistant Professor Merritt Shepherd, MS Student Department of Ocean and Resources Engineering University of Hawaiʻi at Mānoa Location Information **This seminar will be held both in person (Watanabe Hall 112) and over Zoom** Meeting ID: 961 6222 2366 Passcode: OREseminar https://hawaii.zoom.us/j/96162222366 The course, ORE203 Surf Science and Culture, was first taught in the Fall of 2020 and now is in its third year of operation. The course was designed for the broad audience of the University of Hawaiʻi at Mānoa undergraduate students and has been successful in attracting students of all

  • The Pacific Island Ocean Observing System (PacIOOS) wave-measuring buoy

    Watanabe 112 2505 Correa Rd, Honolulu, HI, United States

    Kimball Millikan, Marine Research Engineer Pacific Islands Ocean Observing System (PacIOOS) University of Hawaiʻi at Mānoa Location Information **This seminar will be held both in person (Watanabe Hall 112) and over Zoom** Meeting ID: 961 6222 2366 Passcode: OREseminar https://hawaii.zoom.us/j/96162222366 The PacIOOS wave buoy program maintains an array of 16 real-time wave-measuring buoys throughout the Pacific Islands. I will discuss the operation of the program, mooring design, fabrication, the components, including a brief history of Datwell and the design challenges of the Datawell Wave Rider stabilized platform to measure heave and direction, deployment and recovery techniques of the mooring system,

  • Three-phase flow simulation of beach erosion induced by breaking tsunami-like waves

    Watanabe 112 2505 Correa Rd, Honolulu, HI, United States

    Shijie Huang, PhD Candidate Department of Ocean and Resources Engineering University of Hawaiʻi at Mānoa Location Information **This seminar will be held both in person (Watanabe Hall 112) and over Zoom** Meeting ID: 961 6222 2366 Passcode: OREseminar https://hawaii.zoom.us/j/96162222366 Devastating tsunami waves can mobilize a substantial amount of coastal sediments, causing significant morphological changes to the coastline. To understand the underlying hydrodynamics and sediment transport mechanisms associated with tsunami waves, a three-phase (air, water, and sediment) flow Computational Fluid Dynamics (CFD) model based on OpenFOAM was used to simulate the beach erosion induced by breaking tsunami-like waves. In this talk,

  • Integrated modeling to support marine energy resource characterization and coastal resilience

    Watanabe 112 2505 Correa Rd, Honolulu, HI, United States

    Dr. Zhaoqing Yang Chief Scientist Coastal Sciences Division Northwest National Laboratory     Location Information **This seminar will be held both in person (Watanabe Hall 112) and over Zoom** Meeting ID: 961 6222 2366 Passcode: OREseminar https://hawaii.zoom.us/j/96162222366   This seminar will cover two major research areas carrying out in the Ocean Dynamics Modeling Group in PNNL 1) Marine energy resource characterization and 2) Coastal storm surge and resilience. Marine renewable energy can play an important role in mitigating climate change and enhancing national energy security. PNNL is leading the modeling effort in marine energy resource characterization including wave, tidal stream,

  • Experimental and numerical investigation on the runup of leading-depression N-waves

    Zoom Meeting ID: 961 6222 2366 Passcode: OREseminar

    Dr. Peter Lo, Assistant Professor Department of Engineering Science and Ocean Engineering National Taiwan University Location Information **This seminar will be held over Zoom only** Meeting ID: 961 6222 2366 Passcode: OREseminar https://hawaii.zoom.us/j/96162222366 Solitary waves, widely used benchmark waves in hydrodynamic studies, had historically been implied as a suitable wave form for tsunamis. However, modern tsunami records reveal solitary waves to be an inaccurate model for real tsunamis. For example, before the arrival of a tsunami at shore, a significant recession of water is often observed. Solitary waves are incapable of capturing this drawdown phenomenon, and the leading-depression N-waves (LDNs)

  • The effect of water wave conditions and geometrical parameters of a fixed Oscillating Water Column Wave Energy Converter on its hydrodynamic performance

    Watanabe 112 2505 Correa Rd, Honolulu, HI, United States

    Dr. Ayrton Alfonso Medina Rodriguez Postdoctoral Researcher Applied Research Laboratory and Department of Ocean and Resources Engineering University of Hawaiʻi at Mānoa Location Information **This seminar will be held both in person (Watanabe Hall 112) and over Zoom** Meeting ID: 961 6222 2366 Passcode: OREseminar https://hawaii.zoom.us/j/96162222366 In order to achieve maximum pneumatic power in an Oscillating Water Column (OWC) device, it is crucial for the chamber to operate as close to the resonance condition as possible. This means that the frequency of the incident wave must match the resonant frequency of the converter. This resonant frequency is influenced not only

  • Seminar: Comparing Observations of Seafloor Distributed Fiber-optic Sensing to Observe Ocean Waves

    ORE Zoom

    Dr. Hannah Glover Research Associate Oregon State University *Zoom only* Meeting ID: 963 5962 3640 Passcode: OREseminar https://hawaii.zoom.us/j/96359623640 Distributed Acoustic Sensing is emerging as a powerful technique for observing geophysical and oceanographic processes. DAS methods can provide significant improvements in the spatial and temporal density of in-situ data collection. A single instrument attached to a fiber-optic cable, such as a seafloor telecom cable, can continuously record nanoscale cable strain and temperature with meter-scale measurement spacing over 10s of kilometers at kHz frequencies.  In this seminar, I will explore recent applications of Distributed Acoustic Sensing (DAS) for quantitatively measuring ocean surface

  • Jonas Behnen

    Seminar: Dynamics of Ice Floes: Exploring Wave Attenuation and Overwash through Flexible Plate Models

    Holmes Hall 243 2540 Dole Street, Honolulu, HI, United States

    Jonas Behnen ORE Graduate Student The University of Hawaii at Mānoa *In person and via Zoom* Zoom Meeting Link Meeting ID: 963 5962 3640 Passcode: OREseminar https://hawaii.zoom.us/j/96359623640 In this talk, we will explore the interactions between ocean waves and ice floes using flexible plate models. Through a combination of experiments in a wave flume and simulations with LS-DYNA, we investigate how waves lose energy when interacting with ice floes and what happens when steeper waves trigger overwash — a phenomenon where water splashes onto the ice surface. Our data show that shorter waves lead to greater energy loss, while the