Passive Eel Pass

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This contractor has implemented a  passive eel pass that will ensure a consistent flow rate without any manual or electrical operations. The operation will be monitored, with the aim of using the data collected for similar projects.

The eel pass exit comprises a floating articulating swivel pipe which can adapt to seasonal variations in water level. The novel adaptability is achieved by incorporating ballasted floats to the pipe which control the degree of submergence regardless of the angle of the pass exit pipe.

This floats above the water level preventing it from becoming a downflow pipe but still allows sufficient water to enter the system allowing eels to still ascend the pass. The downstream entrance of the pass is fully submerged and fixed. Passage media is provided using mussel rope commonly used in the aquaculture industry.

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Monitor Report. Volker Stevin Ltd. East Sussex. March 2025.

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About this entry

Published 14 May 2025
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Categories
Environmental champion, Identification of flora, fauna and natural resources, Protect the local environment,

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