SIMPLIFIED METHOD FOR RAINFALL INTENSITIES

Procedures are presented for estimating maximum rainfall amounts for 24 hours with a return period of 10 years from monthly and observation day measurements. Procedures are also presented for converting these values to other rainfall depth- duration amounts. The depth-duration amount varies with the fourth root of the time of duration and the sixth root of the number of years in the return period. Observation-day rainfall is converted to 24-hour values by multiplying by 1.13. Mean monthly rainfall and the maximum monthly values from a 30-year series are used to estimate 10-year return period, 24-hour duration amounts. The 10-year, 24-hour amounts are then used to estimate other depth-duration values. The relationships are good except in protected areas such as for the lee of mountains or in areas surrounded by mountains. (ASCE)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339437
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Hargreaves, G H
• Publication Date: 1981-9

Media Info

• Features: Appendices; References; Tables;
• Pagination: p. 281-288
• Serial:
  • Journal of Irrigation and Drainage Engineering
  • Volume: 107
  • Issue Number: IR3
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9437
  • Serial URL: https://ascelibrary.org/journal/jidedh

Subject/Index Terms

• TRT Terms: Data analysis; Depth; Estimating; Mathematical analysis; Maximization; Methodology; Rainfall; Time
• Uncontrolled Terms: Observation; Rainfall intensity
• Old TRIS Terms: Maxima
• Subject Areas: Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00342187
• Record Type: Publication
• Report/Paper Numbers: ASCE 16513
• Files: TRIS
• Created Date: Dec 22 1981 12:00AM