The water spread into every corner of the fields, beckoning wading ibises and egrets as it bathed long rows of sprouting grapevines. Several inches had covered the vineyard ground for a couple of months. But rather than draining it, Don Cameron was pouring more on. “This is not about irrigation,” the sprawling farm’s manager kept telling his quizzical workers. “It’s about recharge. … I want all the water you can get into the grape fields now.” After a drought-busting winter, reservoirs up and down California are dumping water to make room for spring snowmelt.