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Seminar: A wave-flume study of scour at a pile breakwater: solitary waves

Marine Science Building 114 1000 Pope Road, Honolulu, HI, United States

Conghao Xu Recipient of the ORE Outstanding Student Award, University of Hawai’i Understanding the sediment transport and the resulting scour around coastal structures such as piles under local extreme conditions is important for the stability of foundations of various coastal structures. As a part of combined experimental and multi-phase numerical study of scour around coastal pile structures, this study reports a waveflume experiment investigating the scour at a pile breakwater, which consists of a row of closely spaced piles. Solitary waves were considered in this study. A simple procedure in the experiment was introduced to eliminate possible multiple reflection of

Seminar: An Overview of Recent Projects at the Water Research Laboratory (WRL) of the University of New South Wales, Sydney

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

Dr. François Flocard Principal Engineer Water Research Laboratory University of New South Wales, Sydney, Australia WRL is the largest coastal and hydraulic laboratory in Australia and has been conducting a wide range of research and commercial projects in the last 50 years. This talk will first provide an overview of WRL activities followed by more detailed presentations on 3 different recent research coastal activities: Research and Development on low-carbon coastal protection solutions and how they can be integrated in of breakwater upgrades and remediation in Australia and Pacific Islands; Field measurement and modelling (numerical and physical) of coastal processes in

Seminar: Honolulu Living Shorelines: Resilience and Connectivity by Design

Judith Stilgenbauer, ASLA Professor & Master of Landscape Architecture Program Director School of Architecture University of Hawai'i at Mānoa The applied design research presented in this seminar highlights the role of landscape architecture and large-scale green infrastructure systems in the creation of flood-resilient urban waterfronts. Focusing on three flood-prone catalytic sites, all located in Honolulu’s primary urban center, the presentation visualizes speculative long-term design proposals that introduce nature-based, “soft” coastal adaptation strategies aimed to decrease waterfront vulnerabilities. More broadly, this guest lecture advocates for the anticipation of coastal climate challenges, such as multi-hazard flooding in near-shore development, through innovative ecological

Experiments and Interpretation of Ice-Induced Vibrations of Offshore Structures

Dr. Torodd Nord Associate Professor Department of Ocean Operations and Civil Engineering Norwegian University of Science and Technology (NTNU) When drifting sea ice interacts with a structure, it may result in structural vibrations hence ice-induced vibration.  With the potential to harm the structural integrity, secondary installations and operational safety, ice-induced vibration is an important problem that needs to be addressed in structural design. Since the first deployment of Arctic offshore platforms in Cook Inlet, Alaska in 1960s, extensive measurement campaigns have brought significant attention and knowledge to ice-induced vibrations. With today’s growing demand for renewable energy, the development of offshore

Seminar: Sustainable Hard and Soft Measures for Coastal Protection

Dr. V. Sundar Professor Emeritus Department of Ocean Engineering Indian Institute of Technology Madras, India Any stretch of a coastline warrants protection measure when it experiences an erosion rate beyond a threshold value, and when the seasonal sediment transport/littoral drift changes fail to restore equilibrium. The causes for coastal erosion can either be natural, man-made or a combination of both. The natural causes include extreme storm events, action of waves on the coasts, Sea level rise due to climate change, etc. The man-made causes are often related to developmental activities such as construction of ports, fishing harbours, structures for wave

Seminar: Wave runup, forecasting, and enhanced observations with a drone-mounted LiDAR

Zoom Meeting ID______ 935 4503 7290 Passcode: ore792

Julia Fiedler, PhD Postdoctoral Scholar Scripps Institution of Oceanography University of California San Diego Storm wave run-up causes beach erosion, wave overtopping, and street flooding. Extreme runup estimates may be improved, relative to predictions from general empirical formulae with default parameter values, by using historical storm waves and eroded profiles in numerical runup simulations. For use in a local flood warning system, the relationship between incident wave energy spectra E(f) and SWASH-modeled shoreline water levels is approximated with the numerically simple integrated power law approximation (IPA), wherein broad and multi-peaked E(f) are accommodated by characterizing wave forcing with frequency-weighted integrals

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: A Numerical Study of Effects of Perforation Layouts on Wave Energy Dissipation Caused by a Submerged Perforated Breakwater in Front of a Vertical Seawall

Bilger Hall 150 2545 McCarthy Mall, Honolulu, HI, United States

Brady Halvorson Ph.D. Student Department of Ocean and Resources Engineering University of Hawai’i at Mānoa Location Information **This seminar will be held both in person (Bilger Hall 150) and over Zoom** https://hawaii.zoom.us/j/95081858686 Meeting ID: 950 8185 8686 Passcode: OREseminar Perforated structures are a promising alternative to standard sea walls and breakwaters for dissipating wave energy and protecting coastlines. Perforated marine structures can effectively remove wave energy from ocean waves by the energy loss associated with the flow through the perforations in the structure. Understanding the factors that may affect the hydrodynamic characteristics of flow through a perforated plate is important