TITLE

Measurement of long waves at the harbor of Marina di Carrara, Italy

AUTHOR(S)
Bellotti, Giorgio; Franco, Leopoldo
PUB. DATE
December 2011
SOURCE
Ocean Dynamics;Dec2011, Vol. 61 Issue 12, p2051
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This paper presents the analysis of measurements of long waves at the harbor of Marina di Carrara, Italy. Nine pressure gauges (eight in the inner harbor and one outside the harbor) were used to record continuously the water surface elevation, for about 3 years; incoming short waves were measured using a directional buoy at about 500 m offshore the breakwaters. The analysis is carried out splitting the energy of the long waves into two bands, i.e., very long waves (VLW; f < 0.003 Hz) and long waves (LW; 0.003 < f < 0.030 Hz); it is found that LW energy is strongly correlated with the energy of the incoming short waves while no correlation (or very poor) is found for VLW. During energetic sea states, surface elevation spectra of VLW and LW, normalized against the wave energy of each frequency band, appear to be autosimilar; this suggests that the spectra of the incoming long waves have a mostly constant shape. Simple numerical computations of harbor resonance, carried out using a mild-slope equation linearized model, indicate that the amplification of the height of the incoming LW generated by short waves (calculated using empirical formulae from previous researches by Melito et al. ) inside the harbor can be reasonably predicted using such simple approach, assuming that the LW spectra are rectangular. The shape of the amplification diagram calculated by the numerical model shows reasonable (but not perfect) agreement with the shape of the normalized measured spectra inside the harbor.
ACCESSION #
67508938

 

Related Articles

  • Numerical calculation method for the optimum wave energy absorption configuration based on the variation of Kochin function. Kawabe, Hiroshi; Michima, Paula; Shinohara, Armando; Gonzalez, Cezar // Journal of Marine Science & Technology;Dec2015, Vol. 20 Issue 4, p617 

    This report is about a numerical calculation method for the wave energy absorption of a floating 2D cylinder. The least condition for the complete energy absorption by making use of an oscillating cylinder in waves is that the floating cylinder has to be wave-free on one side direction when it...

  • The Hybrid Kelvin--Edge Wave and Its Role in Tidal Dynamics. Ke, Ziming; Yankovsky, Alexander E. // Journal of Physical Oceanography;Dec2010, Vol. 40 Issue 12, p2757 

    A full set of long waves trapped in the coastal ocean over a variable topography includes a zero (fundamental) mode propagating with the coast on its right (left) in the Northern (Southern) Hemisphere. This zero mode resembles a Kelvin wave at lower frequencies and an edge wave (Stokes mode) at...

  • Observations of a Large-Amplitude Internal Wave Train and Its Reflection off a Steep Slope. Bourgault, Daniel; Janes, David C.; Galbraith, Peter S. // Journal of Physical Oceanography;Mar2011, Vol. 41 Issue 3, p586 

    Remote and in situ field observations documenting the reflection of a normally incident, short, and large-amplitude internal wave train off a steep slope are presented and interpreted with the help of the Dubreil--Jacotin--Long theory. Of the seven remotely observed waves that composed the...

  • Rule the waves. Wilks, Neil // Professional Engineering;3/26/2003, Vol. 16 Issue 6, p27 

    Features the wave-energy generator device, the prototype Wave Dragon. Launch of the central platform of the device in northern Denmark in March 2003; Testing program for the platform; Installation of wave reflectors; Design of Wave Dragon; Entities involved in the development of the device.

  • ON THE WAVE ENERGY POTENTIAL OF THE BULGARIAN BLACK SEA COAST. Galabov, Vasko // Proceedings of the International Multidisciplinary Scientific Ge;2013, p831 

    In the present study we evaluate the approaches to estimate the wave energy potential of the western Black Sea shelf with numerical models. For the purpose of our evaluation and due to the lack of long time series of measurements in the selected area of the Black Sea, we compare the modeled mean...

  • UK marine energy in motion.  // Green Futures;Oct2008, Issue 70, p13 

    The article defines several devices for generating wave energy Great Britain. The LIMPET, or land installed marine powered energy transformer, is a wave energy converter that provides a testbed for new turbines being developed. The pelamis is a deep-water, grid-connected prototype that can move...

  • Energetics of easterly wave disturbances over West Africa and the tropical Atlantic: a climatology from the 1979—95 NCEP/NCAR reanalyses. Diedhiou, A.; Janicot, S.; Viltard, A.; de Félice, P. // Climate Dynamics;Feb2002, Vol. 18 Issue 6, p487 

    Our purpose is to compute the main terms of the energy budget, following Reed et al. to characterize the maintenance of the easterly wave regimes. Although previous studies have been done on some well-observed cases, here, we use NCEP/NCAR reanalyses over the period 1979-1995 to produce a...

  • Wave Modeling of Long Island Coastal Waters. Buonaiuto Jr., Frank S.; Slattery, Michael; Bokuniewicz, Henry J. // Journal of Coastal Research;May2011, Vol. 27 Issue 3, p470 

    Simulating waves nearshore (SWAN) and steady state wave (STWAVE) nearshore wave transformation models were applied to Long Island, New York, coastal waters to investigate regions of wave focusing and their relationship to offshore shelf and shoal zone morphology. Model simulations extended from...

  • Wave energy atlas to identify potential power hotspots.  // Ecos;Aug2014, Issue 198, p13 

    An excerpt from the article "Wave energy atlas to identify potential power hotspots" which appeared online on August 4, 2014 is presented which focuses on the online wave energy atlas to be developed for identification of potential wave power in Australia.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics