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Article

Marine Litter Detection by Sentinel-2: A Case Study in North Adriatic (Summer 2020)

e-GEOS, 00156 Rome, Italy
Academic Editors: Gil Rito Gonçalves and Umberto Andriolo
Remote Sens. 2022, 14(10), 2409; https://doi.org/10.3390/rs14102409
Received: 16 March 2022 / Revised: 20 April 2022 / Accepted: 16 May 2022 / Published: 17 May 2022
(This article belongs to the Special Issue Remote Sensing for Mapping and Monitoring Anthropogenic Debris)
Aggregates of floating materials detected in North Adriatic in six Sentinel-2 scenes of August 2020 have been investigated. Most of the floating materials were identified by the chlorophyll red edge and consisted of vegetal materials, probably conveyed by rivers and exchanged with the lagoons. Traces of marine litter were looked for in the spectral anomalies of the Red Edge bands, assuming changes of the red edge in pixels where marine litter was mixed with vegetal materials. About half of the detected patches were unclassified due to the weakness of the useful signal (pixel filling percentage < 25%). The classification produced 59% of vegetal materials, 16% of marine litter mixed with vegetal materials and 22% of intermediate cases. A small percentage (2%) was attributed to submerged vegetal materials, found in isolated patches. The previous percentages were obtained with a separation criterion based on arbitrary thresholds. The patches were more concentrated at the mouths of the northern rivers, less off the Venice lagoon, and very few outside the Po River, with the minimal river outflow during the period. Sentinel-2 is a valid tool for the discrimination of marine litter in aggregates of floating matter. The proposed method requires validation, and the North Adriatic is an excellent site for field work, as in summer many patches of floating matter form in proximity to the coast. View Full-Text
Keywords: marine litter; North Adriatic; Sentinel-2; floating matter; marine debris marine litter; North Adriatic; Sentinel-2; floating matter; marine debris
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MDPI and ACS Style

Ciappa, A.C. Marine Litter Detection by Sentinel-2: A Case Study in North Adriatic (Summer 2020). Remote Sens. 2022, 14, 2409. https://doi.org/10.3390/rs14102409

AMA Style

Ciappa AC. Marine Litter Detection by Sentinel-2: A Case Study in North Adriatic (Summer 2020). Remote Sensing. 2022; 14(10):2409. https://doi.org/10.3390/rs14102409

Chicago/Turabian Style

Ciappa, Achille Carlo. 2022. "Marine Litter Detection by Sentinel-2: A Case Study in North Adriatic (Summer 2020)" Remote Sensing 14, no. 10: 2409. https://doi.org/10.3390/rs14102409

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