In the world of California water, there is a saying about how our statewide system is supposed to work: “big gulp, little sip.”

The idea is to pump, move and store water from the mountains and snowpack when Mother Nature makes it available. But when it is dry, rivers run low and fish need the water, the pumps are turned way down. California’s water supply is reasonably generous — we are not an arid state. But it is exceedingly volatile, going from very wet to very dry year to year. This big-gulp strategy is designed with that in mind.