Fish Barrier System Design

Fish Barrier System Design

Fish barrier systems are utilized to prevent passage of undesired fish species (e.g. non-native or invasive species) or to direct fish along the optimal path which will allow them to pass up or downstream from a dam or hydroelectric facility quickly and safely. The two primary methods for controlling fish movements are physical barriers and behavioral barriers. 

The most common physical barriers include: close-spaced bar racks, flat panel screens (wedgewire or perforated plate), traveling screens, rotating screens, or nets.

The primary behavioral barriers include: Louvers, Electric Fields, Underwater Lights, Strobe Lights, Acoustic Arrays, Chain Curtain and Air Bubble Curtain.

The behavioral devices which induce an avoidance reaction based on fear are usually less effective than physical barriers. However, behavioral barriers are generally less expensive (installation, operation and maintenance) and non-intrusive compared to physical barriers.




Fish Passage Projects