Rainfall Intensity-Duration Equations

by David C. Froehlich, US Geological Survey, United States,



Document Type: Proceeding Paper

Part of: Soil Properties Evaluation from Centrifugal Models and Field Performance

Abstract:

A method for rapidly developing a rainfall intensity-duration equation for durations less than one hour and recurrence intervals between 2 and 100 years for any location in the conterminous United States is presented. Optimal parameters of a general rainfall-intensity duration equation are determined using precipitation depths for durations of 5, 10, 15, 30 and 60 minutes obtained from commonly available isopluvial maps. A single set of parameters applies to the entire western U.S. For the central and eastern U.S, a graphical means of determining the parameters is provided.

Subject Headings: Rainfall duration | Rainfall intensity | Rainfall-runoff relationships | Parameters (statistics) | Data analysis | Stormwater management | Runoff | United States

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