The U.S. Geological Survey provides a variety of hydrologic and water-resource information. For real-time hydrologic (stream-gaging) data for many states and links to historical streamflow data and to weather information, see
The National Water Conditions site offers streamflow data (current) over the United States and southern Canada; it is a joint effort of USGS and Environment Canada's Climate Information Branch, at
Additional images and information on the Scientific Assessment and Strategy Team (SAST), formed to assess the 1993 Mississippi River basin flooding and to develop a long-term floodplain management plan, are found at
The Dartmouth Flood Observatory at Dartmouth College has created a site through which information on and high-resolution images of floods since 1 January 1994 can be accessed at
For a somewhat different site that describes the geologic history of the region through the evolution of the present stream system, see "Geologic Story of the Ocoee River"