By Dan Bacher - Red, Green & Blue, May 22, 2017
When I was at the March for Science in Sacramento a month ago, a friend asked to get me on video and talk about what is the crux of water issues in California, what is the overriding, central issue behind the different water battles. That’s one that includes the Delta Tunnels, the failure of the state and federal agencies to address environmentalists’ concerns with the safety of the Oroville Dam and spillways, the salmon and other fish collapses and the pollution of our drinking water by agribusiness, municipal and oil waste.
This is a presentation that I recently developed from my conversation with her.
The dire situation: Salmon and other species are collapsing
The Delta smelt, maligned as a “small minnow” by corporate agribusiness interests, is an indicator species that shows the health of the San Francisco-Bay Delta Estuary. Once the most abundant fish in Delta estuary, the Delta smelt population is so small that you can almost name them now. The most recent California Department of Fish and Wildlife (CDFW) fall midwater survey shows that the Delta smelt is the second lowest in CA history, while the related longfin smelt population is the also second lowest.
The Delta smelt collapse is part of an overall ecosystem decline, including dramatic reductions in winter, spring and fall-run Chinook salmon and steelhead populations, driven by water diversions by the federal and state water projects. From 1967 through 2015, populations of striped bass, Delta smelt, longfin smelt, American shad, splittail and threadfin shad declined by 93.7 percent to 99.7 percent (99.7, 98.3, 99.9, 97.7, 98.5 and 93.7 percent) respectively, according to Bill Jennings, Executive Director of the California Sportfishing Protection Alliance.
Then on Tuesday, May 16, some alarming news was unveiled by California Trout and the UC Davis Center for Watershed Sciences in a press teleconference discussing a new report that indicates if present trends continue, the majority of California’s imperiled native salmon, steelhead and trout are likely to be extinct within 100 years.
The report forecasts that 74 percent of the state’s native salmon, steelhead and trout are likely be extinct in the next 100 years — and 45 percent of these fish in 50 years — if the current trends continue. (See: California’s salmon and trout facing EXTINCTION.)
It details the status of 32 salmonid populations in California and identifies opportunities for stabilizing and even recovering these species.
The causes outlined for the dire forecast include drought, climate change human-induced threats, including residential development, major dams, agriculture, fire, alien species, transport, logging, fish harvest, estuary alteration, hatcheries, mining, in stream mining, grazing, urbanization and recreation.
I would add record water exports in recent years – and poor state and federal management of dams. Inexplicably, the report failed to list the biggest threat to Sacramento-San Joaquin River and Trinity-Klamath River salmon, steelhead and other species — Governor Jerry Brown’s Delta Tunnels.