When engineers conduct research on groundwater, the water that flows beneath Earth's surface, they usually think of "large-scale" as one watershed -- an area of land where all of the water on it or under it drains into the same place, such as a lake and its tributaries. Using a 300-node Dell high-performance computing cluster (HPCC) in the Center for Computational Research (CCR) at the University at Buffalo, researcjers are working to turn that definition on its head.