Vol. 5, No. 1, 120-128, 2006

Detection and mapping of oil slicks in the sea by combined use of hyperspectral imagery and laser-induced fluorescence
Marc Lennon, Sergey Babichenko, Nicolas Thomas, Vincent Mariette, Grégoire Mercier and Aleksei Lisin

The demand for efficient detection, mapping and volume estimation of oil pollution in the sea is growing. Reliable observation tools are required to support monitoring flights against sea pollutions and to provide guidance for maritime and airborne means of fighting such occurrences. The present pilot projectaimed at the evaluation of the combined use of airborne passive Hyperspectral Imagery (HI) and Laser Induced Fluorescence (LIF) technologies for remote sensing of oil spills in the sea.

The passive hyperspectral imager (CASI-2) and the Fluorescent Lidar System (FLS-AU) have been installed onboard a fixed-wing aircraft (Cessna 404). Test flights have been carried out over controlled simulated oil pollution at sea off the coast of Brittany, France, in May 2004. CASI data allowed very high spatial resolution (1 and 2 metres) slick maps to be produced, and the polluted surface to be estimated. LIF spectra acquired by FLS-AU allowed oil slick thickness to be locally estimated with approximate spatial resolution of 25 metres along the flight track. The data fusion procedure proved to be consistent with the radiative transfer model over a polluted water area including a thin layer of oil, and allowed a high resolution (1 metre) thickness map to be computed.

As a result of the studies the location, extents, and volume of the oil spilled were estimated from the maps. A critical study of the methodology used and a discussion on the precision reached by the quantitative estimates is proposed. The ways towards the design of an operational system including both passive and active airborne optical sensors for supporting recovering operations are discussed.

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Submitted: 20 Jun 2005
Revised: 21 Feb 2006
Accepted: 07 Mar 2006
Published: 23 Mar 2006

Lennon M, S Babichenko, N Thomas, V Mariette, G Mercier & A Lisin, 2006. Detection and mapping of oil slicks in the sea by combined use of hyperspectral imagery and laser-induced fluorescence. EARSeL eProceedings, 5(1): 120-128


EARSeL European Association of Remote Sensing Laboratories, Strasbourg, France


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