Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2015, Vol. 12, No. 6, pp. 136-142
Investigation of surfactant spreading over the surface of internal fresh-water reservoir using marine navigation radar
A.V. Ermoshkin
1 , I.A. Kapustin
1 1 Institute of Applied Physics RAS, Nizhniy Novgorod, Russia
The paper presents the results of experimental studies of appearance and temporal dynamics of surface-active substances (surfactants) on radar panoramas of wavy water surface carried out at the Gorky reservoir of the Volga River. Marine navigation radar operating in X-band at horizontal polarization radiation was used. Spilling alcohol solution of pure oleic acid simulating surface contamination was carried out with the floating lab “Geophysicist”. As a result of the proposed method of processing of radar panoramas it is possible to highlight the area occupied by the slick and to determine its geometrical parameters. Data processing allowed us to investigate the temporal dynamics of spreading of the artificial slick film, which at the initial stage was in good agreement with the classical theory of Fay (Fay, 1969) in the mode of surface tension when spreading in the direction coinciding with the direction of the wind. When the film spread in the direction transverse to the wind direction, a deviation from the classical theory was observed.
Keywords: surfactants, oil spills, sea surface, gravity-capillary waves, navigation radar
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