FLOOD FREQUENCY OF SMALL STREAMS IN ALABAMA

Equations have been developed for estimating future floods for 2-, 5-, 10-, 25-, 50-, and 100-year recurrence intervals on natural streams in Alabama with drainage areas of 1 to 15 square miles. One equation for each recurrence interval applies statewide. The equations were developed by multiple regression analysis of flood magnitudes obtained from both observed peak discharges and synthetic discharge data generated with a calibrated rainfall-runoff model, and physical basin characteristics. The regression analysis indicated that drainage area and main channel slope are the most significant basin characteristics affecting flood frequency and magnitude. Those characteristics can generally be determined from topographic maps. /Author/

• Supplemental Notes:
  • Sponsored by the State of Alabama Highway Department. Prepared in cooperation with the U.S. Department of Transportation, Federal Highway Administration
• Corporate Authors:

  U.S. Geological Survey

  F Street Between 18th and 19th Street, NW
  Washington, DC    20244
• Authors:
  • Olin, D A
  • Bingham, R H
• Publication Date: 1977-10

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 44 p.

Subject/Index Terms

• TRT Terms: Channels (Waterways); Equations; Floods; Mathematical models; Multiple regression analysis; Rainfall; Regression analysis; Runoff; Slopes; Steam
• Uncontrolled Terms: Flood frequency
• Old TRIS Terms: Basins; Discharge; Multiple regression
• Subject Areas: Data and Information Technology; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00185374
• Record Type: Publication
• Report/Paper Numbers: Final Rpt.
• Contract Numbers: 930-010
• Files: TRIS
• Created Date: Feb 3 1979 12:00AM