Estimate the 25-year and the 100-year peak discharges using the data in Table 13. 12. The map skew for this location is −0.015.

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TABLE 13.12 Annual Peak Discharge in Problem 8 Year 1962 Annual Peak Discharge (m/s) Ranked Annual Peak Weibull Plotting Discharge (m/s) Position y 2,930 2190 0.521 3.34044 11.15854 37.27443 1963 574 1960 0.542 3.29226 10.83898 35.68473 1964 159 1800 0.563 3.25527 10.59678 34.49539 1965 1,400 1750 0.583 1966 1,800 1510 0.604 3.24304 3.17898 10.10591 10.51731 34.10805 32.1265 1967 2,990 1420 0.625 3.15229 9.93693 31.32409 1968 4,470 1400 0.646 3.14613 9.89813 31.14082 1969 2,280 1630 0.667 3.13354 9.81907 30.76846 1970 734 1240 0.688 3.09342 9.56925 29.6017 1971 4,710 1080 0.708 3.03342 9.20164 27.91243 1972 1,360 1050 0.729 3.02119 9.12759 27.57618 1973 265 734 0.75 2.8657 8.21224 23.53381 1974 592 592 0.771 2.77232 7.68576 21.30738 1975 1,050 574 0.792 2.75891 7.61158 20.99968 1976 1,960 560 0.813 2.74819 7.55255 20.75584 1977 4,660 465 0.833 2.66745 7.11529 18.97968 1978 297 427 0.854 2.63043 6.91916 18.20037 1979 400 400 0.875 2.60206 6.77072 17.61781 1980 560 297 0.896 2.47276 6.11454 15.11979 1981 38 265 0.917 2.42325 5.87214 14.22966 1982 1,420 159 0.938 2.2014 4.84616 10.66834 1983 427 119 0.958 2.07555 4.30791 8.941278 1984 119 38 0.979 1.57978 2.4957 3.942665