Given the following 25-yr record of 24-hr maximum annual stream flows (cfs), plot on log- probability paper (or in a spreadsheet program) these values versus the percent of years - during which runoff was equal to or less than the indicated value. Find the peak flow expected on the average of
(a) once every 5 yr,
(b) once every 15 yr
220 | 196 | 89 | 53 | 47 |
200 | 129 | 76 | 50 | 38 |
218 | 142 | 62 | 52 | 36 |
199 | 127 | 67 | 49 | 32 |
180 | 118 | 54 | 47 | 28 |
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