The measurement of waves, has been one difficult problem in observing the wave climate offshore. A crucial element in the development of any numerical model is its validation. Suitable measuring methods could be an ADP - Acoustic Doppler Profiler, a directional buoy, an array of pressuresensors, an ultrasonic device or an echo-sounder. Because of the resulting physical effects which may influence the wave measurement it is important to know how the applied device work. Due to the attenuation of the wave induced pressure signal with depth pressure-based underwater measurements have to be done with a sensor of suited effective range. In this regard the selected installation depth of the sensor or the sensor array is of great importance - the number of the pressure sensors in one array determines the directional resolution of the wave measurement. Direct measurements with movable devices such as a buoy are affected by unwanted acceleration signals as a result of the movement of the water surface. Especially when dealing with wave parameters like the Significant Wave Height (SWH) or the Wave Period. It is also fundamental to know whether the outputted signal is a real measured time series, e.g. the oscillation of the water surface (buoy) or a result of a spectral calculation (ADP). Even the mathematical methods behind the spectral results should be known exactly because little uncertainties there can cause great differences compared to a real-time measurement. Another important aspect is the definition of the measured parameter itself, e.g. the SWH.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Wave and current measurements for offshore windfarms


    Contributors:


    Publication date :

    2010


    Size :

    10 Seiten, 9 Bilder, 1 Tabelle, 14 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Offshore Windfarms-An Approach to Scour Assessment

    Harris, John M. / Maarten Herman, W. / Cooper, Bill S. | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2004

    Free access

    The effects of offshore windfarms on birds

    van der Winden, J. / Schekkermann, H. / Tulp, I. et al. | British Library Conference Proceedings | 2000


    PREDICTION AND MONITORING OF INSTALLATION OF OFFSHORE FOUNDATION MONOPILES FOR WINDFARMS

    Van Dorp, Rob / Moscoso, Nicolas / Bielefeld, Marcel et al. | British Library Conference Proceedings | 2019



    Current Measurements offshore : One-Day Conference

    Society for Underwater Technology | TIBKAT | 1984