Study on fish-friendly inclined and angled trashracks

Sylvain Raynal (1) , Ludovic Chatellier (2) , Dominique Courret (3) , Michel Larinier (3) , Laurent David (2)

1 PPrime [Poitiers] - Institut Pprime [UPR 3346]
2 HydEE - Hydrodynamique et écoulements environnementaux [Institut Pprime]
3 ONEMA - Office national de l'eau et des milieux aquatiques

This paper presents the results on trashrack head losses obtained by Raynal et al. [2013 a,b], [2014] for several configurations. More especially, it compares the head loss formulae proposed in these studies with various equations from the literature to improve energy losses prediction in fish-friendly configurations. These new predictive laws of head losses are applied to the renovation of a hydropower plant and show that inclined trashracks or angled trashracks with streamwise bars are reliable solutions when the bar spacing is reduced.

Mots clés: Head-losses; Water framework directive; Inclined and angled trashracks; Fish-friendly trashracks

Domaines: Biodiversité et Ecologie; Génie des procédés

Sylvain Raynal, Ludovic Chatellier, Dominique Courret, Michel Larinier, Laurent David. Study on fish-friendly inclined and angled trashracks. La Houille Blanche - Revue internationale de l'eau, 2015, 3, pp.31-36. ⟨10.1051/lhb/20150030⟩. ⟨hal-01619347⟩