The annual series of maximum rainfall depth in millimeters (mm) for durations of 5, 10, 15...

The annual series of maximum rainfall depth in millimeters (mm) for durations of 5, 10, 15 30, and 60 minutes obtained from a recording rain gage are tabulated on the next page. Develop a set of rainfall intensity-duration-frequency curves in the genera format of Fig. 7.12. Plot intensity in millimeters/hour versus duration in min­utes. Use the Gumbel probability distribution to develop mean intensities (mm/hr) for recurrence intervals of 2, 5,10, 25, 50, and 100 years for each of the five alterna­tive rainfall durations.