Progress in the Lower Danube: Advancing Wetland Restoration and Renewable Energy
The Lower Danube Demonstrator is making significant progress in wetland restoration by combining technological innovations with sustainable energy solutions. The initiative focuses on automating data acquisition, monitoring, and lock management, with energy provided by tidal power.
Intelligent data acquisition and monitoring
A central development is the intelligent freshwater monitoring and management system, i2VMS-DWR, developed by the Bulgarian SME Scortel in partnership with the University of Ruse. This system will enhance data acquisition and management in wetlands, beginning with deployment at the Kalimok-Brashlen Protected Area, one of the main pilot sites.
The i2VMS-DWR system integrates mobile and fixed measurement points on dikes, lakes, and gates, enabling continuous data flow. A mobile measuring laboratory, including a multiparameter station and a river research drone, allows data collection even in remote areas. This data will be shared with the DaWetRest Digital Portal and external systems to support decision-making and manage water levels in the Kalimok-Brashlen wetlands.
The system will also include wireless sensors to monitor coastal resilience by detecting surface and internal erosion of dikes, helping to maintain wetland stability.
Renewable energy from tidal power
A tidal power generator is scheduled for deployment in the Lower Danube in 2024. Anchored to a pontoon near Kalimok-Brashlen, the generator will capture tidal energy and store it in lithium-ion batteries for local use and research. The system is expected to produce up to 50 kW of power, enough to supply energy to 10–20 average-sized homes.
The generator is equipped with protective measures against ice drift, low water levels, and storms. Cameras will monitor the system in real time, and the generator can be relocated to safer locations if necessary.
The tidal generator will connect to the freshwater monitoring system, allowing for detailed tracking of energy production and consumption to ensure efficient operation of wetland restoration technologies.
The figure below presents the principles of action of the system:
1- pontoon (vessel);
2 – water energy generator;
3- control panel;
4 – devices for measuring basic characteristics of water and air;
5 – charging the batteries;
6 – the electric motors;
7- solar panels;
8 – radio link, communication, navigation and lighting;
9 – the measuring equipment;
10 – security camera.
A Model for the Future
These efforts demonstrate how technology and renewable energy can support wetland restoration while reducing environmental impact. The Lower Danube Demonstrator is laying the groundwork for future conservation projects and promoting sustainable practices.
