Detection of wavy sea surface oil-derivative contamination with forward specular high-frequency scattering

Stanisław Pogorzelski , Paweł Rochowski , Maciej Grzegorczyk , Bogumił Bolesław Linde , Ewa Skrodzka , Łukasz Bielasiewicz

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.
Author Stanisław Pogorzelski (FMPI/IEP)
Stanisław Pogorzelski,,
- Institute of Experimental Physics
, Paweł Rochowski (FMPI/IEP)
Paweł Rochowski,,
- Institute of Experimental Physics
, Maciej Grzegorczyk (FMPI/IEP)
Maciej Grzegorczyk ,,
- Institute of Experimental Physics
, Bogumił Bolesław Linde (FMPI/IEP)
Bogumił Bolesław Linde,,
- Institute of Experimental Physics
, Ewa Skrodzka
Ewa Skrodzka,,
-
, Łukasz Bielasiewicz
Łukasz Bielasiewicz,,
-
Journal seriesPolish Maritime Research, ISSN 1233-2585, e-ISSN 2083-7429, (N/A 70 pkt)
Issue year2020
Vol27
No1 (105)
Pages173-179
Publication size in sheets0.50
Keywords in Englishcrude oil contamination, capillary wave damping, acoustic surface scattering, statistical-frequency analyses, at-sea pollution detection
ASJC Classification2210 Mechanical Engineering; 2212 Ocean Engineering
DOIDOI:10.2478/pomr-2020-0018
URL http://www.bg.pg.gda.pl/pmr/pdf/PMRes_2020_1.pdf
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa - Użycie Niekomercyjne - Bez utworów zależnych (CC-BY-NC-ND); with publication
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 15-07-2020, ArticleFromJournal
Publication indicators WoS Citations = 0.000; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.788; WoS Impact Factor: 2018 = 1.214 (2) - 2018=1.086 (5)
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