Question: A storm drainage project located in Cascade, Idaho has a 1 0 0 - year total rainfall of 2 . 0 inches for a 6

A storm drainage project located in Cascade, Idaho has a 100-year total rainfall of 2.0 inches for a 6-
hour rainfall duration event (determined from the NOAA Precipitation-Frequency Atlas). Create a
hyetograph (on the graph provided below) in discrete 1-hour increments based on the duration-
depth relationship (continuous temporal rainfall distribution) shown. Precent rainfall can be
estimated to the nearest 5%.

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