TY - JOUR
T1 - Sentinel-2 image transformation methods for mapping oil spill – A case study with Wakashio oil spill in the Indian Ocean, off Mauritius
AU - Rajendran, Sankaran
AU - Vethamony, Ponnumony
AU - Sadooni, Fadhil N.
AU - Al-Kuwari, Hamad Al Saad
AU - Al-Khayat, Jassim A.
AU - Govil, Himanshu
AU - Nasir, Sobhi
N1 - Funding Information:
This work was supported by the Qatar University’s International Research Collaboration Co-Funds project (IRCC-2019-002). The authors are thankful to the Copernicus, European Space Agency for sharing the Sentinel-2 data through the Sentinel open access hub. The authors are thankful to Dr. Damià Barceló, the Editor in Chief and anonymous reviewers of the journal for their valuable reviews and constructive comments that have helped to present the work lucidly. The authors are thankful to Dr. Damià Barceló, Editor in Chief and anonymous reviewers of the journal for their valuable reviews, providing comments and suggestions that have helped to present the work lucidly. Open access funding provided by the Qatar National Library.
Funding Information:
This work was supported by the Qatar University's International Research Collaboration Co-Funds project (IRCC-2019-002). The authors are thankful to the Copernicus, European Space Agency for sharing the Sentinel-2 data through the Sentinel open access hub. The authors are thankful to Dr. Dami? Barcel?, the Editor in Chief and anonymous reviewers of the journal for their valuable reviews and constructive comments that have helped to present the work lucidly. The authors are thankful to Dr. Dami? Barcel?, Editor in Chief and anonymous reviewers of the journal for their valuable reviews, providing comments and suggestions that have helped to present the work lucidly. Open access funding provided by the Qatar National Library.
Publisher Copyright:
© 2021 The Author(s)
PY - 2021/1
Y1 - 2021/1
N2 - Although several indices have been constructed and available at the Index database (IDB) for Sentinel-2 satellite to map and study several earth resources, no indices have been developed to map oil spill. We constructed band ratios (5 + 6)/7, (3 + 4)/2, (11+12)/8 and 3/2, (3 + 4)/2, (6 + 7)/5 using the high-resolution MSI (multi-spectral instrument) visible-near infrared-shortwave infrared spectral bands of Sentinel-2 by summing-up the bands representing the shoulders of absorption features as numerator and the band located nearest to the absorption feature as denominator to discriminate oil spill, and demonstrate the potential of this method to map the Wakashio oil spill which occurred in the Indian Ocean, off Mauritius. The resulted images discriminated the oil spill well. We also decorrelated the spectral bands 4, 3 and 2 by studying the spectral band absorptions and discriminated the spill as very thick, thick and thin. The results of decorrelation stretch method exhibited the distribution of types of oil spill in a different tone, distinctly. Both the image transformation methods (band ratios and decorrelation stretch methods) showed their capability to map oil spills, and these methods are recommended to use for similar spectral bands of other sensors to map oil spills. • This study demonstrated the application of band ratios and decorrelation stretch methods to map oil spill. • The methods discriminated the oil spill off Mauritius, and showed spill thicknesses from the Sentinel-2 data. • The new methods are recommended to use for the spectral bands of other sensors to map oil spill.
AB - Although several indices have been constructed and available at the Index database (IDB) for Sentinel-2 satellite to map and study several earth resources, no indices have been developed to map oil spill. We constructed band ratios (5 + 6)/7, (3 + 4)/2, (11+12)/8 and 3/2, (3 + 4)/2, (6 + 7)/5 using the high-resolution MSI (multi-spectral instrument) visible-near infrared-shortwave infrared spectral bands of Sentinel-2 by summing-up the bands representing the shoulders of absorption features as numerator and the band located nearest to the absorption feature as denominator to discriminate oil spill, and demonstrate the potential of this method to map the Wakashio oil spill which occurred in the Indian Ocean, off Mauritius. The resulted images discriminated the oil spill well. We also decorrelated the spectral bands 4, 3 and 2 by studying the spectral band absorptions and discriminated the spill as very thick, thick and thin. The results of decorrelation stretch method exhibited the distribution of types of oil spill in a different tone, distinctly. Both the image transformation methods (band ratios and decorrelation stretch methods) showed their capability to map oil spills, and these methods are recommended to use for similar spectral bands of other sensors to map oil spills. • This study demonstrated the application of band ratios and decorrelation stretch methods to map oil spill. • The methods discriminated the oil spill off Mauritius, and showed spill thicknesses from the Sentinel-2 data. • The new methods are recommended to use for the spectral bands of other sensors to map oil spill.
KW - Decorrelation stretch
KW - Image processing
KW - Indices
KW - Oil spill thickness
KW - Sentinel-2
KW - Sentinel-2 image transformation methods for mapping oil spill
UR - http://www.scopus.com/inward/record.url?scp=85103737000&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85103737000&partnerID=8YFLogxK
U2 - 10.1016/j.mex.2021.101327
DO - 10.1016/j.mex.2021.101327
M3 - Article
C2 - 34430235
AN - SCOPUS:85103737000
SN - 2215-0161
VL - 8
JO - MethodsX
JF - MethodsX
M1 - 101327
ER -