Rugofish

Presentation :
This is a specific substratum which creates roughnesses in flows. It can be used either semi-submerged to facilitate the eel transit by creep or submerged for facilitate creating boundary layers in the flow slightest speeds: bottom of pool fish pass, sluice valves, slabs…

The stud arrangement and the plate configuration increase their porosity while creating boundary layers, which are favourable for swimming and creeping (eels), and suction (lampreys)…

Installation :
The substrate is fixed by sealing or by lag:
– Flat: Bottom of fish pass pool.
– Lateral dip: From 5 to 20 ° (Maximum). Width of equipment will be adapted to the upstream water level fluctuation. The eel transit zone is covered with less than 20 mm of deep water.
– Longitudinal dip: From 5 to 30 ° (Maximum). Equipment Length is adapted to the dam.

rugofish