As part of the CARE SEA project - “Cooperation and Awareness for a Pollution-Free and Environmentally Sustainable Black Sea”—Consortis Geospatial was commissioned to develop an integrated framework for monitoring, analysing, and addressing marine pollution caused by plastics and microplastics in the Thermaicos Gulf.

Introduction

As part of the CARE SEA project - “Cooperation and Awareness for a Pollution-Free and Environmentally Sustainable Black Sea”—Consortis Geospatial was commissioned to develop an integrated framework for monitoring, analysing, and addressing marine pollution caused by plastics and microplastics in the Thermaicos Gulf.

The company’s extensive experience in complex geoinformatics and environmental documentation projects enables it to combine technical expertise with practical decision-support tools.

The Challenge

The project was initiated in response to the growing environmental pressure caused by marine pollution from plastics and microplastics. Microplastics are particularly difficult to detect and monitor, while their dispersal is influenced by hydrodynamic conditions, coastal activities, and the specific characteristics of each study area.

Observations submitted through the CARE SEA participatory platform were compared with established patterns of marine-litter accumulation in the Thermaic Gulf. The findings showed a clear correlation with locations previously identified by the Municipality of Thessaloniki.

The Solution

To address this challenge, a numerical modelling framework for hydrodynamics and microplastic transport was developed and adapted for different study areas. These models support a better understanding of pollutant movement and potential accumulation, while also laying the foundations for their further refinement and application.

At the same time, an online participatory mapping platform was created, enabling citizens to submit georeferenced observations of marine pollution.

The analysis of validated CARE SEA observations revealed similar spatial patterns. Repeated citizen reports were concentrated along the waterfront between the Old Port and Nikis Avenue, particularly in the area near the White Tower.

In this way, the technical study was combined with active public participation, strengthening both environmental data collection and public awareness.

Benefits

The project delivers a range of significant benefits:

• It strengthens the scientific evidence base for understanding marine pollution. 
• It provides practical tools for more effective monitoring, analysis, and decision-making. 
• The use of geospatial data and modelling improves understanding of areas experiencing high environmental pressure and supports the planning of targeted interventions. 
• The participatory platform strengthens cooperation among citizens, public authorities, and the scientific community, while contributing to cross-border collaboration, public awareness, and evidence-based policymaking. 

Overall, the project creates added value by supporting the protection of the marine environment and promoting more sustainable management practices.