Bureau of Reclamation Fisheries Biologist Zak Sutphin checks a fish trap set in the San Joaquin River near the town of Newman in California's Central Valley. Photo © Matt Black / Circle of Blue Fish Screens Are Part of The Answer to Saving Sacramento River Salmon Before the founders of the Family Water Alliance began installing metal screens at the end of the big pipes that draw water from the Sacramento River to irrigate Colusa County’s rice and vegetable fields, seasonal salmon runs often included sizable helpings of fresh fish flopping in the brown dirt of farm furrows. The pumps that transported water were powerful enough to suck migrating fish into the pipes and toss them out the other end, typically startled and very much alive.
Drought, warming water, big dams that block spawning grounds, and contaminated runoff from cities and farmland are said by wildlife researchers to be the primary causes of salmon deaths in the Sacramento River. Installing fish barriers at the end of irrigation pipes, though, is a small, elegant, and not terribly expensive step to help prevent California’s salmon runs from disappearing.
Hundreds of fish screens have been installed on northern California’s other salmon spawning rivers. The result is that in the struggle to sustain California’s imperiled chinook, coho, and steelhead fishery, hundreds of thousands of spawning adults, newly hatched fry, and migrating juveniles are not perishing in irrigation systems.
“The lessons here are easy to explain,” said Debra Lemburg, the project manager at Family Water Alliance, during a 2015 interview with Circle of Blue. “Farmers can pump water from the river. Fish are protected. They are not being killed.” |