California was sinking before the drought because water was being pumped from the aquifers even when it rained. Now, the aquifers are being drained so quickly that the ground is now sinking 1 to 2 inches a month. That sounds small, but it cracks foundations of roads, buildings, bridges, and dams. The amplifying effect is that it also shifts aqueducts, which is particularly a problem for the carefully contoured ones that rely on gravity to maintain a flow; and of course, a cracked aqueduct leaks. California’s ground sinkage is accelerating, and so are its problems.
(Click on the map for the link.)