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Rizzo A, Scicchitano G, Mastronuzzi G. A set of guidelines as support for the integrated geo-environmental characterization of highly contaminated coastal sites. Sci Rep 2024; 14:8198. [PMID: 38589526 PMCID: PMC11001938 DOI: 10.1038/s41598-024-58686-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 04/02/2024] [Indexed: 04/10/2024] Open
Abstract
The knowledge of geomorphodynamic aspects is crucial for understanding marine and coastal processes/dynamics as well as for characterizing coastal environments heavily affected by anthropogenic activities. To provide a framework of analysis that can be applied in a consistent way for the geo-environmental characterization of highly contaminated coastal sites, in this paper a set of operational guidelines is proposed. Special attention is given to the role of geomorphological-based surveys and analyses in defining (i) the site-specific geological model of the investigated site, (ii) the anthropogenic impacts on marine and coastal sediments, (iii) the expected morphodynamic variations induced by climate change and anthropogenic interventions, (iv) tailored dissemination activities and community engagement plans. Then, an evaluation of the state of the art of activities already performed for the characterization of the coastal contaminated sites located in the Apulia region (southern Italy) is provided. The outcomes of this research are also provided in the form of infographics to favor their dissemination among communities and stakeholders.
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Affiliation(s)
- Angela Rizzo
- Department of Earth and Geo-Environmental Sciences, University of Bari Aldo Moro, Via Orabona, 4, 70125, Bari, Italy.
- Interdepartmental Research Centre for Coastal Dynamics, University of Bari Aldo Moro, Via Orabona, 4, 70125, Bari, Italy.
| | - Giovanni Scicchitano
- Department of Earth and Geo-Environmental Sciences, University of Bari Aldo Moro, Via Orabona, 4, 70125, Bari, Italy
- Interdepartmental Research Centre for Coastal Dynamics, University of Bari Aldo Moro, Via Orabona, 4, 70125, Bari, Italy
| | - Giuseppe Mastronuzzi
- Department of Earth and Geo-Environmental Sciences, University of Bari Aldo Moro, Via Orabona, 4, 70125, Bari, Italy
- Interdepartmental Research Centre for Coastal Dynamics, University of Bari Aldo Moro, Via Orabona, 4, 70125, Bari, Italy
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Mghili B, Hasni S, Ben-Haddad M, Rangel-Buitrago N, Keznine M, Lamine I, Hamiche FZ, Haddaoui H, Abelouah MR, Demiathi M, Oubahaouali B, Jellal N, Touaf M, Ahannach Y, Hassou N, Cherradi S, Aksissou M. Plastic pollution on Moroccan beaches: Toward baselines for large-scale assessment. MARINE POLLUTION BULLETIN 2024; 201:116288. [PMID: 38531205 DOI: 10.1016/j.marpolbul.2024.116288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 03/20/2024] [Accepted: 03/20/2024] [Indexed: 03/28/2024]
Abstract
In Africa, Morocco is the 10th largest producer of plastic. The severity of this plastic has attracted increasing amounts of attention in the Moroccan Atlantic and Mediterranean in recent years. However, at the national level, there is limited knowledge of plastic pollution. To obtain an exhaustive and comprehensive evaluation of plastic pollution levels in Morocco, large-scale monitoring is needed on all the coasts of the country. In this context, this paper examined the composition, abundance, distribution, source and quality of beaches on two Moroccan coasts using four beach quality indices along 29 beaches. During two seasons, a total of 72,105 items were counted. The mean litter abundance was 0.31 items/m2, and the Mediterranean beaches were more dense than the Atlantic beaches. In particular, litter density was greater in spring (0.35 items/m2) than in summer (0.29 items/m2). The data indicate considerable differences in the density of marine debris according to the seasonality, beach typology and presence of rivers. Hazardous litter items were collected along both Moroccan coasts, constituting 8.41 % of the total collected items, with a mean of 0.026 items/m2. The use of environmental indices allowed us to classify Moroccan beaches as "moderate cleanliness", "moderate abundance" of plastics, "moderately safe" presence of hazardous litter and "mediocre" environmental status. The findings of the present study indicate that the sources of litter on both Moroccan coasts come mainly from recreational activities and dumping. The waste management practices recommended for Moroccan beaches include reducing sources, mitigating mitigation measures and changing littering behavior.
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Affiliation(s)
- Bilal Mghili
- LESCB, URL-CNRST N° 18, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco.
| | - Soufiane Hasni
- Biology Department, Faculty of Sciences and Technology of Tangier, Abdelmalek Essaadi University, Morocco
| | - Mohamed Ben-Haddad
- Laboratory of Aquatic Systems, Marine and Continental Environments (AQUAMAR), Faculty of Sciences, Ibn Zohr University, Agadir 80000, Morocco
| | - Nelson Rangel-Buitrago
- Programa de Física, Facultad de Ciencias Básicas, Universidad del Atlántico, Barranquilla, Atlántico, Colombia
| | - Mohamed Keznine
- LESCB, URL-CNRST N° 18, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Imane Lamine
- Laboratory of Aquatic Systems, Marine and Continental Environments (AQUAMAR), Faculty of Sciences, Ibn Zohr University, Agadir 80000, Morocco; Higher Institute of Nursing Professions and Technical Health, Errachidia, Morocco
| | - Fatima Zahra Hamiche
- LESCB, URL-CNRST N° 18, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Hatim Haddaoui
- Scientific Institute, University Mohammed V, Rabat, Morocco
| | - Mohamed Rida Abelouah
- Laboratory of Aquatic Systems, Marine and Continental Environments (AQUAMAR), Faculty of Sciences, Ibn Zohr University, Agadir 80000, Morocco
| | - Manal Demiathi
- LESCB, URL-CNRST N° 18, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Brahim Oubahaouali
- LESCB, URL-CNRST N° 18, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Nadia Jellal
- Research Laboratory in Applied and Marine Geosciences, Geotechnics and Geohazards (LR3G), Faculty of Sciences, Abdelmalek Essaâdi University, 93000 Tetouan, Morocco
| | - Mounia Touaf
- LESCB, URL-CNRST N° 18, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Youssef Ahannach
- LESCB, URL-CNRST N° 18, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Najwa Hassou
- Higher Institute of Nursing Professions and Technical Health, Rabat, Morocco
| | - Sohayb Cherradi
- Polydisciplinary Faculty in Larache, University Abdelmalek Essadi, Morocco
| | - Mustapha Aksissou
- LESCB, URL-CNRST N° 18, Faculty of Sciences, Abdelmalek Essaadi University, Tetouan, Morocco
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Cofano V, Mele D, Lacalamita M, Di Leo P, Scardino G, Bravo B, Cammarota F, Capolongo D. Microplastics in inland and offshore sediments in the Apulo-Lucanian region (Southern Italy). MARINE POLLUTION BULLETIN 2023; 197:115775. [PMID: 37979531 DOI: 10.1016/j.marpolbul.2023.115775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 10/09/2023] [Accepted: 11/09/2023] [Indexed: 11/20/2023]
Abstract
Inland and offshore sediments from Southern Italy were studied in order to evaluate the occurrence and nature of microplastics (MPs). Inland sediments were collected in the Bradano and Basento rivers (Apulo-Lucanian region, Southern Italy), while offshore sediments were collected on the continental shelf near Bari (Adriatic Sea) and Metaponto (Ionian Sea). MPs were detected and characterized using optical microscopy, micro-Fourier-Transform Infrared spectroscopy (μ-FTIR) and micro-Raman analyses. The number of MPs present varied between 144 and 1246 kg-1 of dry sediment (468.8 ± 410,7 MPs kg-1) with a predominance of black fibers; no correlation emerged between MPs and sediment grain size. In river sediments, the occurrence of MPs is associated with local pollution, whereas the offshore occurrence of MPs depends on seasonal river flow and submarine canyons. Compositional analyses suggest that the main source of MPs in the studied sediments is sewage discharge from residential areas.
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Affiliation(s)
- Vito Cofano
- Department of Earth and Geoenvironmental Sciences, Campus Universitario, University of Bari Aldo Moro, Via Edoardo Orabona 4, 70125 Bari, Italy.
| | - Daniela Mele
- Department of Earth and Geoenvironmental Sciences, Campus Universitario, University of Bari Aldo Moro, Via Edoardo Orabona 4, 70125 Bari, Italy
| | - Maria Lacalamita
- Department of Earth and Geoenvironmental Sciences, Campus Universitario, University of Bari Aldo Moro, Via Edoardo Orabona 4, 70125 Bari, Italy
| | - Paola Di Leo
- CNR-IMAA, Tito Scalo, Potenza I-85050, Italy; School of Specialization in Archaeological Heritage, SSBA DiCEM - Department of European and Mediterranean Cultures, University of Basilicata, Matera, Italy
| | - Giovanni Scardino
- Department of Earth and Geoenvironmental Sciences, Campus Universitario, University of Bari Aldo Moro, Via Edoardo Orabona 4, 70125 Bari, Italy
| | - Barbara Bravo
- Thermo Fisher Scientific, Str. Rivoltana, Km 4, 20090 Rodano, MI, Italy
| | - Francesca Cammarota
- ARPAB, Regional Agency for Environmental Protection of Basilicata, Matera, Italy
| | - Domenico Capolongo
- Department of Earth and Geoenvironmental Sciences, Campus Universitario, University of Bari Aldo Moro, Via Edoardo Orabona 4, 70125 Bari, Italy
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Vlachogianni T, Scoullos M. Assessing marine macrolitter on the coastline of the Asterousia Biosphere Reserve: Insights from a community-based study. MARINE POLLUTION BULLETIN 2023; 195:115474. [PMID: 37672921 DOI: 10.1016/j.marpolbul.2023.115474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/26/2023] [Accepted: 08/29/2023] [Indexed: 09/08/2023]
Abstract
Even in pristine and remote environments of the Mediterranean, marine litter is building up threatening habitats and species and inhibiting sustainable development. The present study reports the findings of beach litter surveys carried out by 250 local community members in nine sites along the coastline of the Asterousia Biosphere Reserve, situated in the southernmost end of Europe. The average recorded litter density along these sites amounted to 125 items per 100 meters of coastline (range: 22-510) and to 0.05 items per square meter of beach (range: 0.01-0.13). Only two of the nine surveyed beaches were found to be in good environmental status, in compliance with the European threshold value for beach litter. The other seven studied beaches surpassed the European threshold value. The primary sources of the litter identified in the study can be attributed to unsustainable practices and inadequate waste management by individuals, communities and municipalities using the coastal and marine environment. Additionally, unsustainable waste management practices within the agricultural sector were also found to be a significant contributor to marine litter pollution.
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Affiliation(s)
- Thomais Vlachogianni
- Mediterranean Information Office for Environment, Culture and Sustainable Development, Athens, Greece.
| | - Michael Scoullos
- Mediterranean Information Office for Environment, Culture and Sustainable Development, Athens, Greece; Laboratory of Environmental Chemistry, Faculty of Chemistry, University of Athens, Greece
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Andriolo U, Gonçalves G. The octopus pot on the North Atlantic Iberian coast: A plague of plastic on beaches and dunes. MARINE POLLUTION BULLETIN 2023; 192:115099. [PMID: 37267867 DOI: 10.1016/j.marpolbul.2023.115099] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 06/04/2023]
Abstract
This baseline focuses on the octopus pot, a litter item found on the North Atlantic Iberian coast. Octopus pots are deployed from vessels in ropes, with several hundred units, and placed on the seabed, to capture mostly Octopus Vulgaris. The loss of gears due to extreme seas state, bad weather and/or fishing-related unforeseen circumstances, cause the octopus pots contaminating beaches and dunes, where they are transported by sea current, waves and wind actions. This work i) gives an overview of the use of octopus pot on fisheries, ii) analyses the spatial distribution of this item on the coast, and iii) discusses the potential measures for tackling the octopus pot plague on the North Atlantic Iberian coast. Overall, it is urgent to promote conducive policies and strategies for a sustainable waste management of octopus pots, based on Reduce, Reuse and Recycle hierarchical framework.
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Affiliation(s)
- Umberto Andriolo
- INESC Coimbra, Department of Electrical and Computer Engineering, Polo 2, 3030 - 290 Coimbra, Portugal.
| | - Gil Gonçalves
- INESC Coimbra, Department of Electrical and Computer Engineering, Polo 2, 3030 - 290 Coimbra, Portugal; University of Coimbra, Department of Mathematics, Coimbra, Portugal.
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Rangel-Buitrago N, Ochoa FL, Rodríguez RDB, Moreno JB, Trilleras J, Arana VA, Neal WJ. Decoding plastic pollution in the geological record: A baseline study on the Caribbean Coast of Colombia, north South America. MARINE POLLUTION BULLETIN 2023; 192:114993. [PMID: 37167662 DOI: 10.1016/j.marpolbul.2023.114993] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 04/05/2023] [Accepted: 04/23/2023] [Indexed: 05/13/2023]
Abstract
This study presents the first report of plastics in the geological record (rocks and formations composed of plastics) along the central Caribbean Coast of Colombia, northern coast of South America. These novel records of pollution include two rock types (plastiglomerates and quartz plastisandstones), two altered plastic types (pyroplastics and plasticrusts), two soil types (plasticlasts and anthrosols), and a series of artifacts (fossils) found near human settlements. All of them were analyzed using Fourier Transform Infrared (FTIR) spectroscopy. Polyester, high-density polyethylene, and copolymers of alkyl acrylates or methacrylates were identified as the principal polymers forming these rocks. This research provides new insights into the petrology of these emerging new forms of pollution, for which humans are primarily responsible for their generation and distribution. Similarly, the results presented emphasize that plastics are generating a deluge of pollutants in terms of variety and volume, overwhelming natural environments globally. Controlling or even eliminating their use has become one of the most significant challenges of the 21st Century.
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Affiliation(s)
- Nelson Rangel-Buitrago
- Programa de Física, Facultad de Ciencias Básicas, Universidad del Atlántico, Barranquilla, Atlántico, Colombia.
| | - Felipe Lamus Ochoa
- Departamento de Física y Geociencias, Division de Ciencias Básicas, Universidad del Norte, Barranquilla, Atlántico, Colombia
| | - Rubén Darío Beltrán Rodríguez
- Departamento de Física y Geociencias, Division de Ciencias Básicas, Universidad del Norte, Barranquilla, Atlántico, Colombia
| | - Jose Brito Moreno
- Departamento de Física y Geociencias, Division de Ciencias Básicas, Universidad del Norte, Barranquilla, Atlántico, Colombia
| | - Jorge Trilleras
- Programa de Maestría en Ciencias Químicas, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia, Atlántico, Colombia; Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia, Atlántico, Colombia
| | - Victoria Andrea Arana
- Programa de Maestría en Ciencias Químicas, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia, Atlántico, Colombia; Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico, Puerto Colombia, Atlántico, Colombia
| | - William J Neal
- Department of Geology, Grand Valley State University, The Seymour K. & Esther R. Padnos Hall of Science 213A, Allendale, MI, USA
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Scarrica VM, Aucelli PP, Cagnazzo C, Casolaro A, Fiore P, La Salandra M, Rizzo A, Scardino G, Scicchitano G, Staiano A. A novel beach litter analysis system based on UAV images and Convolutional Neural Networks. ECOL INFORM 2022. [DOI: 10.1016/j.ecoinf.2022.101875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Scardino G, Martella R, Mastronuzzi G, Rizzo A, Borracesi Q, Musolino F, Romanelli N, Zarcone S, Cipriano G, Retucci A. The nauticAttiva project: A mobile phone-based tool for the citizen science plastic monitoring in the marine and coastal environment. MARINE POLLUTION BULLETIN 2022; 185:114282. [PMID: 36327931 DOI: 10.1016/j.marpolbul.2022.114282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
Plastic pollution is involving large coastal areas of the Mediterranean Sea. Innovative methods of plastic monitoring can be addressed through the citizen science approaches integrated with mobile phones. On the other hand, the availability of mobile phones is increasing among several users. Mobile phones can be integrated with a web mobile app, which allows to collect a lot of data for extended areas and in a short temporal range. In this study, the web service of iNaturalist was applied to implement a mobile phone-based tool to collect pictures of plastic items. At present, the web mobile app has been used to collect pictures of plastic debris in the Mediterranean Sea. Results were compared with the Mediterranean hydrodynamic regime, to highlight the pathways and densities of the plastic items. The proposed mobile phone-based tool represented a citizen science approach useful for the acquisition of plastic observations in the marine and coastal environment.
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Affiliation(s)
- Giovanni Scardino
- Department of Earth and Geo-environmental Sciences, University of Bari Aldo Moro, 70125 Bari, Italy; Interdepartmental Research Center for Coastal Dynamics, University of Bari Aldo Moro, 70125 Bari, Italy
| | | | - Giuseppe Mastronuzzi
- Department of Earth and Geo-environmental Sciences, University of Bari Aldo Moro, 70125 Bari, Italy; Interdepartmental Research Center for Coastal Dynamics, University of Bari Aldo Moro, 70125 Bari, Italy
| | - Angela Rizzo
- Department of Earth and Geo-environmental Sciences, University of Bari Aldo Moro, 70125 Bari, Italy; Interdepartmental Research Center for Coastal Dynamics, University of Bari Aldo Moro, 70125 Bari, Italy.
| | | | | | | | | | - Giulia Cipriano
- Department of Biosciences, Biotechnologies and Environment, University of Bari Aldo Moro, 70125 Bari, Italy
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Bouzekry A, Mghili B, Aksissou M. Addressing the challenge of marine plastic litter in the Moroccan Mediterranean: A citizen science project with schoolchildren. MARINE POLLUTION BULLETIN 2022; 184:114167. [PMID: 36182785 DOI: 10.1016/j.marpolbul.2022.114167] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/18/2022] [Accepted: 09/19/2022] [Indexed: 05/26/2023]
Abstract
In this study, based on data collected by citizen science, we studied the abundance, spatial and temporal distribution of marine litter in three beaches of the Moroccan Mediterranean. A total of 14,042 litter items were collected with an average abundance of 0.58 items/m2. The most of litter were composed of anthropic polymeric materials, representing 74 % of the total litter collected. Plastics account for the majority of the items collected and are mainly caps/lids, crisp/sweet packets, plastic/polystyrene, cigarette butts and small plastic bags. Litter abundance displayed significant seasonal differences, with the highest during summer. Tourism and poor waste management practices are the major sources of plastic on the beaches surveyed. The use of the Clean Coast Index (CCI) and the Plastics Abundance Index (PAI) permits the classification of the three beaches in the Moroccan Mediterranean as a "moderately clean" coastal area with a "very high abundance" of plastics. In addition, the Hazardous Items Index (HII) allows classification of the region as highly polluted by hazardous litter. Best management measures are needed to promote the environmental quality of the beaches of the Moroccan Mediterranean.
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Affiliation(s)
- Assia Bouzekry
- LESCB, URL-CNRST N° 18, Abdelmalek Essaadi University, Faculty of Sciences, Tetouan, Morocco
| | - Bilal Mghili
- LESCB, URL-CNRST N° 18, Abdelmalek Essaadi University, Faculty of Sciences, Tetouan, Morocco.
| | - Mustapha Aksissou
- LESCB, URL-CNRST N° 18, Abdelmalek Essaadi University, Faculty of Sciences, Tetouan, Morocco
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What Are Lake Beaches Made of? An Assessment of Plastic Beach Litter on the Shores of Como Bay (Italy). APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12115388] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Plastic waste dispersion is a well-recognized environmental threat, despite continuous efforts towards improving waste disposal management over the last few decades. Plastic litter is known to strongly impact upon water bodies and shorelines, affecting the health of ecosystems and impacting upon the aesthetic value of sites. Moreover, plastic waste that is abandoned on beaches contributes towards different degradation processes that potentially lead to the formation of secondary microplastics (MPs), with likely cascade effects upon the whole ecosystem. In this view, this study aims to characterize the plastic beach litter found on the shores of the western basin of Como Lake (Italy) to better understand the origin of MPs in littoral sediments, including the recognition of object typologies and the chemical characterization of polymers using Fourier-transformed infrared analysis (FTIR). The results highlighted that the most abundant polymers on beaches are polypropylene (PP) and polyethylene (PE), representing 73% of the collected polymers. This confirms that floating, low-density polymers are more likely to accumulate on beaches. Moreover, almost 66% of litter is represented by commonly used manufactured items (disposable objects, packaging, and everyday items). This evidence, combined with the analysis of the main environmental features of the sampling sites (the main winds, distance to urban areas, and the presence of tributaries) indicate that abundance of beached litter is mainly linked to beach accessibility and the local winds. These results highlight that multiple factors affect the environmental fate of plastic litter and give insights into the assessment of secondary microplastics in beach sediments.
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Gonçalves G, Andriolo U. Operational use of multispectral images for macro-litter mapping and categorization by Unmanned Aerial Vehicle. MARINE POLLUTION BULLETIN 2022; 176:113431. [PMID: 35158175 DOI: 10.1016/j.marpolbul.2022.113431] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/01/2022] [Accepted: 02/03/2022] [Indexed: 06/14/2023]
Abstract
The use of Unmanned Aerial Systems (UAS, aka drones) has shown to be feasible to perform marine litter surveys. We operationally tested the use of multispectral images (5 bands) to classify litter type and material on a beach-dune system. For litter categorization by their multispectral characteristics, the Spectral Angle Mapping (SAM) technique was adopted. The SAM-based categorization of litter agreed with the visual classification, thus multispectral images can be used to fasten and/or making more robust the manual RGB image screening. Fully automated detection returned an F-score of 0.64, and a reasonable categorization of litter. Overall, the image-based litter density maps were in line with the manual detection. Assessments were promising given the complexity of the study area, where different dunes plants and partially-buried items challenged the UAS-based litter detection. The method can be easily implemented for both floating and beached litter, to advance litter survey in the environment.
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Affiliation(s)
- Gil Gonçalves
- INESC Coimbra, Department of Electrical and Computer Engineering, Polo 2, 3030 - 290 Coimbra, Portugal; University of Coimbra, Department of Mathematics, Apartado 3008 EC Santa Cruz, 3001 - 501 Coimbra, Portugal
| | - Umberto Andriolo
- INESC Coimbra, Department of Electrical and Computer Engineering, Polo 2, 3030 - 290 Coimbra, Portugal.
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