LOS ANGELES — It's a major source of California's water supply and a vital habitat for fish, migratory birds and other species.
But the Sacramento-San Joaquin River Delta watershed is also a fragile ecosystem in decline, with human demands for water taking a harsh toll on the environment.
With a third year of severe drought straining water resources and pushing endangered salmon and other fish closer to extinction, California officials have announced a controversial $2.6 billion deal with the federal government and major water suppliers that they say will bolster the ecosystem.
