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This report presents a method by which the magnitude of floods of selected frequencies for most streams in the South Atlantic slope and eastern Gulf of Mexico basins can be determined. Composite frequency curves shown for four regions define the relation of a flood of any recurrence interval from 1.1 to 50 years to the mean annual flood. Areal curves show the relation between drainage area and the mean annual flood in 19 hydrologic areas. A method is shown for adjusting the mean annual flood where the percentage of the drainage area in lakes and swamps is sufficient to cause attenuation of flood peaks. Some main-stem streams exhibit varying hydrologic characteristics, and individual flood-frequency curves are defined for use where the regional and area! curves are not applicable. A design concept is presented, and a method is given for determining the probability of a flood of a specified recurrence interval being exceeded in a designated period. Maximum known flood stages and discharges at gaging stations and peak discharges at miscellaneous sites are given. The maximum discharges are plotted against drainage areas, and the 10and 50-year flood-frequency curve? are shown for each hydrologic area to provide a convenient means for evaluating the frequencies of the maximum known floods within each area. Flood peak discharge data and descriptions are given for all gaging stations in Part 2-B having 5 or more years of record except for those stations in the Florida Everglades south of Lake Okeechobee and those stations on canals and drainage ditches

Magnitude and frequency of floods in the United States; part 2-B. South Atlantic slope and Eastern Gulf of Mexico basins, Ogeechee River to Pearl River