Streamflow and cross-section data for the Tombigbee River between Gainesville and Demopolis locks and dams

A review of records and historical research of floods indicate that the flood of April 15-18, 1979, was the highest recorded this century along the reach of the Tombigbee River that is now bounded upstream by Gainesville Lock and Dam and downstream by Demopolis Lock and Dam. The peak discharge during this flood ranged from 247,000 cu ft/sec at Epes to 343,000 cu ft/sec at Demopolis Lock and Dam. Limit curves developed for the tailwater of Gainesville Dam, based on 105 computed discharges for four flood events since April 1979, show the range in stage for a given discharge at this site. Data from hydrographic surveys that were made for more than 100 sedimentation ranges in 1971 are on file with the U.S. Army Corps of Engineers. Presently 42 sedimentation ranges between Gainesville Lock and Dam and Demopolis Lock and Dam are surveyed routinely. Comparison of these and other data can be made in order to observe what changes have occurred along this reach of the river, as a result of natural and man-made causes. These and other hydrologic data collected along the reach of the Tombigbee River between Gainesville Lock and Dam and Demopolis Lock and Dam are presented in tables. (USGS)