Sediment & Debris
Debris and sediment are two of the most difficult issues in fish screening. When debris adheres to a screen surface, the effective screen area is decreased, causing higher approach velocities, which in turn causes more debris to impinge on the surface. Sediment accumulation can accumulate within a screening system, causing excessive wear on seals and mechanical cleaning systems and decreasing the effective screen area by blocking flow through the screen surface.
FCA was fortunate to develop screening projects in basins with very high levels of organic material, as well as large sediment loads. The Farmers Screen moves debris over the screen and back to the river without using a mechanical cleaning mechanism. An effective sediment management system was developed to address a constant flow of glacial and other sediment into Farmers Screen installations.
Sediment and debris carried by diverted water can cause big problems for fish screens. The Farmers Screen manages sediment and debris in a way that is both cost-effective and safe for fish.