Surveys taken by NASA satellites demonstrate that land in California's Central Valley sunk between 10 and 13 inches in the second half of last year. Since then, it might have dropped even more. The sinking is nothing new, but it's happening faster as the result of groundwater pumping by farmers who aren't getting their usual allotments from water-project reservoirs because of the drought. Lisa Krieger is reporting on the consequences for the San Jose Mercury-News.
