Jump to the content

Fishway Tilting Flume

Fishway Tilting Flume   
The objective of this large scale pool-type fishway flume, with the ability to perform tests with real specimen, is to study fish behavior in the transposition of river hydraulic structures, like weirs and small dams.

The facility is 10 m long, 1.0 m wide and 1.2 m high and as an adjustable slope, with glass-viewing panels on both sidewalls allowing the specimen direct observation while simultaneously monitoring fish movements through the simulated obstacles. It features a fish acclimation chamber (4.0 x 3.0 x 4.0 m), at the downstream end of the channel, and two slot gates, positioned at its upstream and downstream ends, to control the discharge and water level within the structure. The main channel can be adjustable, being the hydraulic structures, designed to mimic previously recorded obstacles, placed in it.

Presently, the flume is used to carrying out tests to study the effects of instream structures on the migratory movements of Iberian fish species and define mitigation measures for improving connectivity in Portuguese rivers.

General views of the fishway tilting flume