Abstract A spectrum of low-frequency (20–30 Hz) amplitude fluctuations of the ultrasonic (10 MHz) signal specularly scattered from water surfaces covered with monomolecular and thicker crude oil origin films of well-defined, oceanographically relevant viscoelastic properties was examined in laboratory and at-sea conditions. The relationship between the surface water wave (30 Hz) damping coefficient and the oil layer thickness was established, and compared to the one predicted by the classical Stokes theory. The depression of the spectral energy density of wind-driven waves by surface films was inferred from the ratio of acoustic signal fluctuations spectra with/without films, and compared to that resulting from the Marangoni damping theory applicable to monolayers of particular surface viscoelasticity. The agreement between the theory and experimental data was satisfactory. As shown in at-sea experiments performed with a free-floating, buoy-like acoustic system, and an artificial oil slick spread over the Baltic Sea surface, the film’s rheological surface properties can be recovered from acoustic surface probing, as well as oil spill edge detection. Simultaneous statistical analyses of the scattered signal amplitude distribution parameters turned out to be unequivocally related to the oil substance fraction weight, oil layer thickness, and the form of oil contamination.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Detection of Wavy Sea Surface Oil-Derivative Contamination with Forward Specular High-Frequency Scattering



    Published in:

    Publication date :

    2020




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    Unknown


    Classification :

    BKL:    50.92 Meerestechnik / 55.40 Schiffstechnik, Schiffbau



    Detection of Wavy Sea Surface Oil-Derivative Contamination with Forward Specular High-Frequency Scattering

    Pogorzelski Stanisław / Rochowski Paweł / Grzegorczyk Maciej et al. | DOAJ | 2020

    Free access

    General Specular Surface Triangulation

    Bonfort, Thomas / Sturm, Peter / Gargallo, Pau | Springer Verlag | 2006


    General Specular Surface Triangulation

    Bonfort, T. / Sturm, P. / Gargallo, P. | British Library Conference Proceedings | 2006


    RAIL WAVY WEAR DETECTION DEVICE, AND RAIL WAVY WEAR DETECTION METHOD

    OKADA NOBUYUKI / SASAUCHI TAKAHIRO / OBA TAKUYA | European Patent Office | 2019

    Free access

    Specular highlight reduction with known surface geometry

    Wei, Xing / Xu, Xiaobin / Zhang, Jiawei et al. | British Library Online Contents | 2018