Abstract

In September 2020, two major fires broke out in a large crude oil tanker in Sri Lanka’s maritime zones. An island with a vast sea area in the Indian Ocean, Sri Lanka, is prone to vessel sourced pollution. Crude oil can have a damaging impact on the environment, and therefore tracking the spill in the water is essential. Spaceborne sensors support monitoring oil pollution; however, optical sensors need clear skies for observation. The detection of pollution caused by vessels; in Sri Lanka’s maritime zones has previously been investigated by the author. This study examines the data collected by the Sentinel-1 satellite, whose sensing corresponds to the oil spill event, manually and using algorithms to detect the presence of oil spills. Two detected oil spill areas were measured to be 0.6 km and 1.4 km long. Further, in this study, the SAR sensor’s vertical signal transmission and reception mode produced acceptable results in detecting the spills and the vessel. Sentinel-1 SAR data is essential, in this case, to detect the presence of the oil spills and the vessels.

Highlights

  • This study has been motivated by an interest in the application of Earth Observation (EO) Copernicus Sentinel-1 Synthetic Aperture Radar (SAR) data in the detection of possible marine pollution by the tanker called "New Diamond," which caught fire, on 03 September 2020, in the east of Sri Lanka

  • This study aims at detecting the oil spill caused by the "New Diamond" tanker on Sri Lanka's east coast in September 2020; with SAR data

  • Three dark lines were visible with eight bright spots close to one of the dark lines in the VV polarization mode (Fig. 3. (b))

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Summary

Introduction

This study has been motivated by an interest in the application of Earth Observation (EO) Copernicus Sentinel-1 Synthetic Aperture Radar (SAR) data in the detection of possible marine pollution by the tanker called "New Diamond," which caught fire, on 03 September 2020, in the east of Sri Lanka. On 03 September 2020, a fire broke out in "New Diamond," a 330 m tanker, which is carrying crude oil about 38 NM off Sangamankanda in Sri Lanka's east coast and, 02 days after the fire was extinguished, a new fire broke out By 10 September 2020, the fire was extinguished According to the disaster management team, crude oil storage is safe, and the tanker is located about 50 NM off the east coast

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