| Popis: |
This paper presents a study of satellite-based aquatic petroleum pollution monitoring mode. First, four field data collections were made in 2006 and 2008. The sampling sites were in where the rivers were all threaten by petroleum pollution. The most important feature of water spectra in visible and near-infrared wavelength influenced by petroleum pollution was discovered after analysis in detail. It exhibited three peaks and two troughs in the water spectral curves influenced by petroleum contamination. Secondly, the spectral data collected from the polluted rivers were processed to remote reflectance as corresponding bands of ENVISAT/MERIS. At the same time the detecting wave of MERIS data obtained above were taken into account. And then the MERIS-based monitoring mode of petroleum pollution concentration was established according to Fisher multi-class discriminant rule and combining with corresponding water quality data. Finally, the mode was applied to the ENVISAT/MERIS data overpass on June 5, 2007 in order to obtain the distributing image of petroleum pollution concentration in the rivers. By mean of the image the temporal change and spatial distribute of the petroleum concentration within the rivers were analyzed. |
