SYNTHESIZED FLOOD FREQUENCY OF URBAN STREAMS IN ALABAMA. FINAL REPORT

Equations have been developed for estimating future floods for 2-, 5-, 10-, 25-, 50-, and 100-year recurrence intervals on urban streams in Alabama with drainage areas of about 0.15 to 85 square miles. One equations were derived by multiple regression analyses of flood magnitudes obtained from synthetic discharge data generated with a calibrated rainfall-runoff model and basin characteristics. The regression analyses indicated that drainage area size and percent of the basin occupied by impervious materials are the most significant basin characteristics affecting flood frequency and magnitude of urban streams. Mathematical procedures used to analyze the observed and synthetic data are described. Also included are flood-frequency datta for stations used in the analyses and example computations demonstrating application of the regression equations to urban streams in Alabama. (Author)

• Corporate Authors:

  U.S. Geological Survey

  F Street Between 18th and 19th Street, NW
  Washington, DC    20244

  Alabama State Highway Department

  Bureau of Materials and Tests, 1409 Coliseum Blvd
  Montgomery, AL  United States  36130

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Olin, D A
  • Bingham, R H
• Publication Date: 1982-8

Media Info

• Features: Figures; References; Tables;
• Pagination: 27 p.

Subject/Index Terms

• TRT Terms: Drainage basins; Equations; Floods; Mathematical models; Rainfall; Regression analysis; Runoff; Streams; Urban areas
• Uncontrolled Terms: Flood frequency
• Subject Areas: Data and Information Technology; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00454475
• Record Type: Publication
• Report/Paper Numbers: FHWA-AL-83-095, 82-683
• Contract Numbers: 930-087
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jul 31 1986 12:00AM