Rainfall Intensity-Duration Equationsby David C. Froehlich, US Geological Survey, United States,
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 intensity | Rainfall duration | Rainfall-runoff relationships | Parameters (statistics) | Data processing | Hydrologic data | Data analysis | North America | United States
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