Xinhua: The city of Irvine, California, for example, has extensively studied its aquifer. They know how low they can let the aquifer go before needing to either stop pumping or to supplement supply, Richey said. There's a paper that says basically you can't manage what you don't know and right now we aren't really managing groundwater well, if at all.
Lance Larson, a science center fellow at the Natural Resources Defense Council, said that its critical to monitor whatever groundwater is left.
These...