Rodelta has the technology and knowledge to carry out fish-friendly or rather fish-passable pumping stations so that fish can survive these barriers and move between different waters. For example, fish swim from river to stream, ditch to ditch or even back and forth between salt and fresh water. This is done by fish to reproduce, to find food or to escape predatory fish. For example, an eel swims as much as 6,000 kilometres to reproduce, all the way across the Atlantic to the Sargasso Sea. The young eels (glass eels) then make the journey back to Europe to grow back into adult eels in our rivers.
During this journey, fish encounter obstacles. For example, a pumping station where the fish cannot pass safely. However, pumping stations are essential. The water board regulates the water level in ditches, canals, rivers and lakes. Removing this obstacle with its water management function is not possible. Rodelta is capable of carrying out the pumping station in a fish passable manner, while at the same time maintaining an efficiently functioning pumping station.
Experience with fish-friendly pumps
Rodelta has a great deal of experience with fish-friendly pump designs and hydraulics.For example, Rodelta’s employees were closely involved in the creation of the NEN 8775. This is the fish safety standard that defines the method for determining the fish safety of pumps, Archimedes’ screws and enclosed water turbines.
Among other things, this NEN 8775 provides a calculation method for calculating the survival rate of fish that pass through pumps, Archimedes’ screws or enclosed water turbines.
Making a pump fish passable goes beyond placing a fish passable impeller in the pump. The number of blades, the tipspeed, the angle of impact, the number and shape of the diffuser vanes, and the use of valves and bends etc. play also a major role. Thanks to its internal hydraulic and mechanical engineering team, Rodelta has the knowledge and skills to develop suitable solutions for new and existing pumps. To describe all facets and possibilities on this website goes too far. So if you are interested and would like to know more about what we can do for your fish passable pump solution, please contact our sales team at info@rodelta.com.
They will be happy to tell you more about all the possibilities.
By giving space to different species of fish, the ecological balance of nature can develop well. Together we can create a better diverse world. Where nature is given priority. Smart design techniques make this possible.
DISTINCTIVE VISION.
