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Title: MONITORING OF OIL POLLUTIONS IN THE CASPIAN SEA USING SENTINEL-1 AND SENTINEL-2 IMAGES
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MONITORING OF OIL POLLUTIONS IN THE CASPIAN SEA USING SENTINEL-1 AND SENTINEL-2 IMAGES
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1314-2704
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English
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20
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2.2
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Currently, the issue of pollution of the Caspian Sea, which is saturated with oil industry facilities, is highly relevant. Monitoring of such objects and phenomena that pose a potential and real threat of natural and man-made emergencies, such as emergency oil spills that entail significant environmental damage, is important for Kazakhstan.
The main purpose of this paper is to evaluate the capabilities of SAR and optical images in the task of detecting oil spills, having tested them in the task of mapping zones with a high frequency of occurrence of oil spills for three years. Due to its many advantages, SAR imagery is currently the most common remote sensing tool for oil spills. However, using SAR images, it is sometimes difficult to identify man-made oil spills and false objects similar to them, which are commonly called ?look-alikes? and include windless areas, organic slicks of natural origin, algal blooms, etc. The combined use of SAR and optical data improves the reliability of oil pollution detection. Using optical images to detect oil spills, we rely on the spectral characteristics of objects, and although the reflectivity varies depending on the thickness and composition of the spot, in most cases oil spills can be distinguished from similar spurious objects. The large amount of data made it possible to generalize and obtain statistically reliable results on the spatial and temporal variability of the manifestations of slick pollution of various types on satellite images of the sea surface. From April 2018 to December 2019 alone, 1303 satellite images of the sea surface from the Sentinel 1 and 2 satellites were received and analyzed. The total area of the detected oil spills in the Kazakhstan part of the Caspian Sea reached 68.4 km2. The main source of surface pollution of open areas of the Caspian Sea identified during monitoring are leaks and discharges from ships of oil-contaminated waters along the main shipping lanes. |
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conference
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20th International Multidisciplinary Scientific GeoConference SGEM 2020
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20th International Multidisciplinary Scientific GeoConference SGEM 2020, 18 - 24 August, 2020
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; C
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251-258
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18 - 24 August, 2020
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website
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cdrom
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7069
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Oil spills; Dark spot detection; Synthetic aperture radar; Optical band; Caspian Sea
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