Title/Purpose
· Development of brush substrate for use with self adjusting fish ladder.
Objectives
· Overcome problems currently faced in areas with varying water levels
· Assist eel migration around flood defences and other obstacles
Solution
· Concept of a flexible backed brush designed to accommodate variations in positioning of fish ladder
· Several materials tested in order to ensure performance under different conditions
· High spec materials used in manufacture to ensure consistent performance
· Samples tested and results monitored
Outcome
"Development of the flexible eel pass brush substrate was the first stage in overcoming problematic installs where a rigid linear substrate would require modification to the site. Although the current rigid brush element worked effectively in a fixed position, it could not adjust when installed as part of a self-regulating eel pass.
We contacted Cottam to design a solution which would provide the same excellent level of performance while adapting to changing environmental and spatial conditions. They developed a solution which is not only effective but can be customised to any installation."
Andy Don – Environment Agency |
