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River protection solutions
Published on 13 Mar ‘26
River Protection Solutions: Eel Conservation Case Study
River protection solutions for eel conservation

International Day of Action for Rivers is almost here. At Ecocoast, we provide innovative river protection solutions to preserve these vital lifelines. Rivers provide clean water for millions and support vast biodiversity. However, many river species now face a silent crisis that requires urgent attention.

A Critical Crisis for Our Waterways

European eel populations have declined catastrophically. Their numbers have dropped by up to 95%. This has led to their listing as Critically Endangered by the IUCN Red List. These eels are essential top predators in our rivers. They help regulate fish populations and maintain health.

Several factors contribute to this devastating decline. Habitat loss and migration barriers are major issues. Man-made infrastructure like water pumps also poses risks. To combat this, the United Kingdom (UK) implemented the Eels (England and Wales) Regulations 2009. This requires specific river protection solutions to reduce risks to eels at vulnerable sites.

The Belaugh Intake Challenge

The Belaugh raw water intake sits on the River Bure. It’s located within the environmentally sensitive Broads National Park. The intake supplies water to approximately 52,000 local properties. This specific section of the river is quite narrow. It also experiences frequent recreational traffic from canoeists and boaters.

Before our project, the intake used outdated screens. These did not comply with current eel standards. Large amounts of natural debris often accumulated here. Reeds and branches blocked the intake frequently. This created high maintenance costs and safety risks. Furthermore, river users often drifted dangerously close to the intake.

Introducing a Smart Engineering Solution

Ecocoast was tasked with protecting this critical site. We designed an innovative floating debris boom, following technical best practices for eel and elver passage design – a guideline from the Environment Agency. We customized the Bolina Permanent Debris Boom (PDB600). This system balances ecological goals with operational needs.

The PDB600 is one of our most effective river protection solutions. It features the original flush-faced design, pioneered by our team. By placing all buoyancy floats on the downstream side, we create a perfectly smooth surface on the river side. This prevents debris and small craft from getting caught. It also provides a clear path for wildlife.

Built for Stability and Species Safety

Our design focused on the specific river morphology. We used double float arrangements for increased stability. Each float contains 5kg of steel weights. This added mass allows the boom to absorb waves, remaining secure even during high flow events.

Safety for river users was also a priority. We integrated a visible yellow arrestor wire, acting as a clear physical deterrent. We also installed prominent “No Moorings” warning signs. These features keep the public away from the dangerous intake area.

Long-Term Gains for River Health

The benefits of this river protection system are clear. The flush profile ensures safe passage for eels. It guides migrating fish away from hazardous intakes. The self-clearing function also deflects floating debris. This protects the integrity of the intake screens.

Furthermore, this solution requires very little maintenance. Similar UK installations have lasted over 19 years. This proves that durable engineering can protect nature. We believe in proactive protection for all waterways.

Protecting our rivers is a global responsibility. We are proud to lead with engineered solutions. Contact us to know more about how we protect ecosystems. Together, we can ensure our rivers stay healthy.

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