Juvenile winter-run salmon are released into the Sacramento River as part of an effort to save the species that has seen die-offs two years in a row. Photo: Andreas Fuhrmann, AP

Juvenile winter-run salmon are released into the Sacramento River as part of an effort to save the species that has seen die-offs two years in a row. Photo: Andreas Fuhrmann, AP

In yet another battle in California’s water wars, politics is attempting to override science. This has proved disastrous for fisheries and water quality in the past. There is little reason to think it is a good idea now.