Fig. 3
From: Performance of an acoustic telemetry system in a large fishway
The weir pool (left panel) and the forebay (right panel) at Wanapum Dam. The weir pool is located adjacent to the fish slide while the forebay is near the outfall of the fish slide. Fish swam out of the weir pool into the top of the fish slide and then passed into the forebay on their upstream migration. The direction of flow is shown with the red arrow. Water was pumped up from the forebay to provide flow down the fishway and into the upper end of the fish slide