Desert Sun: Reservoirs have been shrinking, aquifers have been declining, and an estimated 5 percent of the state's irrigated farmland, from the Central Valley to Southern California, has been left dry and withering. In the Coachella Valley, water agencies are responding to the state's mandatory water restrictions with new rules such as limiting lawn-watering times and outlawing front-yard car washes with hoses. The drought's impact is apparent on the outskirts of Palm Springs, where a network of 19 groundwater...