FLOOD09807

• County: Statewide
• Community: Nationwide
• Basin: Statewide
• Title: A Uniform Technique for Determining Flood Flow Frequencies
• Date: 12/1/1967
• Prepared By: Water Resources Council - Hydrology Committee
• Floodplain - Doc Type: Educational/Technical/Reference Information

Table 1 - - K values for positive skew coefficients
Recurrence Interval in Years
Skew 1. 0101 1. 0526 1.1111 1.2500 2 5 10 25 30 100 200
Coefficient
(g) Percent Chance
99 95 90 80 50 20 10 4 2 1 0.5
3.0 -0.667 -0.665 -0.660 -0.636 -0.396 0.420 1,180 2.278 3.152 4,051 4.970
2.9 -0.690 -0.688 -0.681 -0.651 -0.390 0.440 1.195 2.277 3.134 4.013 4.909
2.8 -0.714 -0.711 -0.702 -0.666 -0.384 0.460 1. 210 2.275 3.114 3.973 4.847
2,7 -0.740 -0.736 -0.724 -0.681 -0,376 0.479 1. 224 2.272 3.093 3.932 4.783
2.6 -0.769 -0.762 -0.747 -0.696 -0.368 0.499 1.238 2,267 3.071 3.889 4.718
2.5 -0.799 -0.790 -0.771 -0.711 -0.360 0.518 1.250 2.262 3.048 3.845 4.652
2.4 -0.832 -0.819 -0.795 -0.725 -0.351 0.537 1. 262 2.256 3.023 3.800 4.584
2.3 -0.867 -0.850 -0.819 -0,739 -0.341 0.555 1. 274 2.248 2.997 3.753 4.515
2.2 -0.905 -0.882 -0.844 -0.752 -0.330 0.574 1.284 2.240 2.970 3.705 4.444
2.1 -0.946 -0.914 -0.869 -0.765 -0.319 0,592 1. 294 2.230 2.942 3.656 4.372
2.0 -0.990 -0.949 -0.895 -0.777 -0.307 0.609 1. 302 2.219 2.912 3.605 4.298
1.9 -1. 037 -0.984 -0.920 -0.788 -0.294 0.627 1. 310 2.207 2.881 3.553 4.223 -
1.8 -1. 087 -1.020 -0.945 -0.799 -0.282 0.643 1. 318 2.193 2.848 3,499 4.147 0
1.7 -1. 140 -1.056 -0.970 -0.808 -0.268 0.660 1. 324 2.179 2.815 3.444 4.069
1.6 -1.197 -1. 093 -0.994 -0.817 -0.254 0.675 1. 329 2.163 2.780 3.388 3.990
1.5 -1. 256 -1.131 -1. 018 -0.825 -0,240 0.690 1. 333 2.146 2.743 3.330 3.910
1.4 -1. 318 -1. 168 -1. 041 -0.832 -0.225 0.705 1. 337 2.128 2.706 3.271 3.828
1.3 -1. 383 -1. 206 -1. 064 -0.838 -0.210 0.719 1. 339 2.108 2.666 3.211 3.745
1.2 -1. 449 -1. 243 -1. 086 -0.844 -0.195 0.732 1.340 2.087 2.626 3.149 3.661
1.1 -1. 518 -1.280 -1. 107 -0.848 -0.180 0,745 1,341 2.066 2.585 3,087 3.575
1.0 -1. 588 -1.317 -1.128 -0.852 -0.164 0.758 1.340 2,043 2.542 3.022 3.489
.9 -1.660 -1. 353 -1. 147 -0.854 -0.148 0,769 1.339 2.018 2.498 2.957 3.401
,8 -1. 733 -1. 388 -1. 166 -0.856 -0.132 0.780 1. 336 1. 993 2,453 2,891 3,312
.7 -1. 806 -1. 423 -1. 183 -0,857 -0,116 0.790 1. 333 1. 967 2.407 2,824 3.223
.6 -1.880 -1. 458 -1.200 -0.857 -0,099 0.800 1. 328 1. 939 2.359 2.755 3.132
,5 -1.955 -1.491 -1. 216 -0.856 -0,083 0.808 1. 323 1,910 2.311 2.686 3.041
.4 -2.029 -1. 524 -1. 231 -0.855 -0.066 0.816 1. 317 1. 880 2.261 2.615 2.949
.3 -2.104 -1.555 -1. 245 -0.853 -0.050 0.824 1.309 1.849 2.211 2.544 2.856
.2 -2.178 -1. 586 -1. 258 -0.850 -0.033 0.830 1. 301 1. 818 2.159 2,472 2,763
.1 -2.252 -1.616 -1. 270 -0,846 -0.017 0.836 1.292 1.785 2.107 2.400 2.670
0 -2,326 -1. 645 -1. 282 -0.842 0 0.842 1. 282 1.751 2.054 2.326 2.576

A

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