IMIS - Marine Onderzoeksgroepen

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Targeting the reduction of plastic outflow into the North Sea
https://www.interregnorthsea.eu/treasure
Dutch title: Vermindering van de plasticuitstroom naar de Noordzee
Funder identifier: 41-6-64-22 (EU contract id)
Principal funding codes: 3899 - Other EU initiatives out of framework
Acronym: TREASURE
Period: June 2023 till November 2026
Status: In Progress

Thesaurus terms ANE, North Sea; Aquatic sciences, challenges and pollution not elsewhere classified; Belgium; Biodiversity; Denmark; Environmental pollution; Environmental rehabilitation; France; Germany; Marine pollution; Multilevel governance not elsewhere classified; Netherlands; Project

The objective of this project is to reduce the outflow of plastic waste from rivers and inland waterways into the marine environment of the North Sea. We want to develop a toolbox to enable science-supported policy and management decisions to combat the plastic outflow.

  • Husabø, E.; Silburn, B.; Maes, T.; Devriese, L,; Galgani, F.; Kammann, U.; Kelly, N.E.; Pham, C.K.; Lavelle, S.; Preston-Whyte, F.; Russell, J.; Norén, K.; De Witte, B. (2026). Assessing seafloor litter classification: Lessons from an online proficiency test. Environ. Manag. 76(8): 265. https://dx.doi.org/10.1007/s00267-026-02492-3, more
  • Azzid Jouannin, F.; Bompoil, M. (2026). Evaluation of techniques and equipment for the removal of aquatic litter - Part 1: Surface water clean-up. CEDRE: Brest. 49 pp., more
  • Bompoil, M.; Andre, S. (2026). Evaluation of techniques and equipment for the removal of aquatic litter - Part 2: Clean-up on land. CEDRE: Brest. 49 pp., more
  • Montier, M. (2024). Imagine a world without plastic, what a TREASURE!, in: Mees, J. et al. Book of abstracts – VLIZ Marine Science Day, 6 March 2024, Oostende. VLIZ Special Publication, 91: pp. 94, more
  • De Buyser, S.; Devriese, L.I.; Lonneville, B.; Verleye, T.J.; Pirlet, H. (2024). Mapping of policy instruments and powers of authorities in the transition zone from inland waters to sea: Three study areas in Flanders. Flanders Marine Institute (VLIZ): Ostend. 28 pp. https://dx.doi.org/10.48470/90, more
  • Nitschke, T.; Maas, G.; Dhondt, C.A.L.; Heisel-Sure, Y.; Laschinger, J.; Bartos, L.; Albrecht, N.; Lahanas, N.; Bompoil, M.; Veillet, G.; Doyen, P.; Amara, R.; Svenningsen, M.; Schipperheijn, I.; Kristiansen, P.; Mehta, P.; van Wijk, J.; de Vries, R.; d'Arcy Metcalfe, R.; Lacroix, C.; Catarino, A. (2026). Methodological factsheets: Litter observations in river-sea interfaces. Flanders Marine Institute (VLIZ): Ostend. 29 pp. https://dx.doi.org/10.48470/140, more
  • L’Hégaret, P.; Lacroix, C.; Cozette, P. (2026). Pollution by aquatic litter in the Brittany, Normandy, and Hauts-de-France river basins. CEDRE: Brest. , more
  • Bompoil, M.; Andre, S. (2026). Pollution by aquatic litter in the ports of Brittany, Normandy, and Hauts-de-France: Lessons learned from visits on sites. CEDRE: Brest. 23 pp., more
  • Bompoil, M.; L’Hégaret, P.; Laithier, M. (2025). Pollution by aquatic litter in the ports of Brittany, Normandy and Hauts-de-France: Knowledge review. CEDRE: Brest. 31 pp., more
  • Bompoil, M.; Andre, S. (2025). Pollution by aquatic litter in the ports of Brittany, Normandy and Hauts-de-France: Diagnosis and clean-up equipment deployed. CEDRE: Brest. 29 pp., more
  • Nitschke, T.; Sawan, R.; Dhondt, C.A.L.; Devriese, L.I.; Everaert, G.; Decrop, B.; Doyen, P.; Amara, R.; Catarino, A.I. (2024). Quantification and characterization of riverine plastic litter outflow into the North Sea within the international TREASURE project, in: Mees, J. et al. Book of abstracts – VLIZ Marine Science Day, 6 March 2024, Oostende. VLIZ Special Publication, 91: pp. 102, more
  • Nitschke, T.; Maas, G.; Catarino, A.I.; Dhondt, C.A.L.; Heisel-Sure, Y.; Laschinger, J.; Bartos, L.; Albrecht, N.; Lahanas, N.; Bompoil, M.; Veillet, G.; Doyen, P.; Amara, R.; Svenningsen, M.; Schipperheijn, I.; Kristiansen, P.; Mehta, P.; van Wijk, J.; de Vries, R.; d'Arcy Metcalfe, R.; Lacroix, C. (2026). Riverine litter photoguide, for visual identification and categorization of riverine litter in the North Sea Region. Version 1.0. Flanders Marine Institute (VLIZ)/TREASURE Consortium: Ostend. 93 pp. https://dx.doi.org/10.48470/155, more
  • Devriese, L.I.; De Buyser, S.; Catarino, A.I.; Moulaert, I.; Dhondt, C.A.L.; Meneses, C.; Rondelez, J.; Nitschke, T.; Everaert, G.; Roelofsen, F.; Fierens, N.; van Welij, D.; Monballieu, J.; Decrop, B.; Koutrouveli, T.; Wang, L.; Breugem, A.; Stellamanse, G.; Amara, R.; Doyen, P.; Depoorter, M.; Maelfait, H. (2024). TREASURE – Living Lab Nieuwpoort. Blueprint and Roadmap. 2.0. Flanders Marine Institute: Ostend. 53 pp. https://dx.doi.org/10.48470/91, more
  • Devriese, L.I.; Catarino, A.I.; Moulaert, I.; Van den Auwelant, C.; Dhondt, C.A.L.; Meneses, C.; Rondelez, J.; Nitschke, T.; Everaert, G.; Roelofsen, F.; Fierens, N.; Decrop, B.; Koutrouveli, T.; van Welij, D.; Depypere, T.; Amara, R.; Doyen, P.; Depoorter, M.; Maelfait, H. (2023). TREASURE – Living Lab Nieuwpoort. Blueprint and Roadmap. 1.0. Flanders Marine Institute: Ostend. 40 pp. https://dx.doi.org/10.48470/67, more
  • Devriese, L.; Couvreur, G.; De Buyser, S. (2025). TREASURE - Multi-level governance and policies for succesful plastic pollution mitigation in the Living Lab Nieuwpoort. Flanders Marine Institute (VLIZ): Ostend. 37 pp. https://dx.doi.org/10.48470/115, more
  • Rondelez, J.; Dhondt, C.A.L.; Maas, G.; de Winter, W.; Lacroix, C.; André, S.; Heisel-Sure, Y.; Catarino, A.I.; Devriese, L, (2024). TREASURE - Targeting the REduction of plAStic oUtflow into the noRth sEa: Data Management Plan. Version 1.4. TREASURE Consortium: Ostend. 18 pp., more