Summary
The annual maxima were fit to a GEV distribution. This distribution was used to generate predictions for return periods (and corresponding exceedence probabilities) of 500 years, 200 years, 100 years, 50 years, 25 years, 10 years, 5 years, 3 years, and 2 years. Standard methodology for rainfall is to apply Weiss factors based on the data being collected as hourly data. The GEV with and without Weiss factors was reported.
Results
Station_GEV_Reprocessed_8_2012_all.xlsx
Sample Data
GEV Without Weiss Factor - Booksville Combined |
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Probability |
RP |
Hr1 |
Hr2 |
Hr6 |
Hr12 |
Hr24 |
Hr48 |
Hr72 |
Hr96 |
Hr120 |
0.998 |
500 |
3.802 |
4.658 |
7.51 |
13.348 |
16.829 |
23.384 |
27.468 |
28.38 |
27.354 |
0.995 |
200 |
3.576 |
4.433 |
6.871 |
11.239 |
13.919 |
18.462 |
21.041 |
21.874 |
21.578 |
0.99 |
100 |
3.389 |
4.24 |
6.375 |
9.808 |
11.997 |
15.405 |
17.207 |
17.977 |
18.022 |
0.98 |
50 |
3.186 |
4.023 |
5.866 |
8.503 |
10.284 |
12.821 |
14.075 |
14.781 |
15.037 |
0.96 |
25 |
2.965 |
3.78 |
5.342 |
7.307 |
8.753 |
10.63 |
11.508 |
12.154 |
12.526 |
0.9 |
10 |
2.64 |
3.406 |
4.617 |
5.867 |
6.958 |
8.217 |
8.792 |
9.363 |
9.783 |
0.8 |
5 |
2.358 |
3.068 |
4.028 |
4.852 |
5.729 |
6.668 |
7.122 |
7.639 |
8.04 |
0.667 |
3 |
2.116 |
2.769 |
3.549 |
4.116 |
4.857 |
5.625 |
6.033 |
6.511 |
6.873 |
0.5 |
2 |
1.885 |
2.475 |
3.112 |
3.504 |
4.146 |
4.81 |
5.206 |
5.652 |
5.968 |
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GEV With Weiss Factor - Brooksville Combined |
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Probability |
RP |
Hr1 |
Hr2 |
Hr6 |
Hr12 |
Hr24 |
Hr48 |
Hr72 |
Hr96 |
Hr120 |
0.998 |
500 |
4.344 |
4.968 |
7.669 |
13.488 |
16.917 |
23.449 |
27.515 |
28.417 |
27.381 |
0.995 |
200 |
4.086 |
4.728 |
7.017 |
11.357 |
13.991 |
18.514 |
21.077 |
21.902 |
21.600 |
0.99 |
100 |
3.872 |
4.522 |
6.510 |
9.911 |
12.059 |
15.448 |
17.236 |
18.000 |
18.040 |
0.98 |
50 |
3.640 |
4.291 |
5.990 |
8.592 |
10.337 |
12.857 |
14.099 |
14.800 |
15.052 |
0.96 |
25 |
3.388 |
4.031 |
5.455 |
7.384 |
8.799 |
10.660 |
11.528 |
12.170 |
12.539 |
0.9 |
10 |
3.016 |
3.632 |
4.715 |
5.929 |
6.994 |
8.240 |
8.807 |
9.375 |
9.793 |
0.8 |
5 |
2.694 |
3.272 |
4.113 |
4.903 |
5.759 |
6.687 |
7.134 |
7.649 |
8.048 |
0.667 |
3 |
2.418 |
2.953 |
3.624 |
4.159 |
4.882 |
5.641 |
6.043 |
6.519 |
6.880 |
0.5 |
2 |
2.154 |
2.640 |
3.178 |
3.541 |
4.168 |
4.823 |
5.215 |
5.659 |
5.974 |
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Weiss Factors |
1.1425 |
1.0665 |
1.0212 |
1.0105 |
1.0052 |
1.0026 |
1.0017 |
1.0013 |
1.0010 |
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