AdvertisementFlood Maps Can Get Much Sharper With A Little Supercomputing OomphJune 30, 2015Joe PalcafacebookEmailThis is a calculated flood map for the city of St. Louis. Water depth goes from deep (dark blue) to shallow (white, light blue). Floodwater can come from the Illinois, Upper Mississippi and Missouri rivers, as well as from heavy local precipitation. (Courtesy of Dag Lohmann/Katrisk)