Given the following values of peak flow rates for a small stream, determine the return period (years) for a flood of 100 cfs by first using annual peaks for an annual series and then by using all the data in a partial-duration series.
Year | Date | Peak (cfs) |
1984 | June 1 | 90 |
| Aug. 3 | 300 |
1985 | June 7 | 60 |
1986 | July 2 | 80 |
1987 | May 18 | 100 |
| June 3 | 90 |
1988 | July 4 | 40 |
1989 | May 11 | 800 |
| June 8 | 700 |
| Sept. 4 | 90 |
1990 | Aug. 8 | 400 |
1991 | May 9 | 30 |
1992 | Sept. 8 | 700 |
1993 | May 4 | 80 |
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