Flood Frequency Analysis

The following annual maximum streamflow values where obtained and converted into m3/s discharge:

##               MaxQ(ML)    discharge
## 1967-12-31     41.6115    0.4816146
## 1968-12-31  23676.7000  274.0358796
## 1969-12-31  26827.1000  310.4988426
## 1970-12-31  45717.9000  529.1423611
## 1971-12-31 149424.0000 1729.4444444
## 1972-12-31  46526.2000  538.4976852

Fitted log-pearson 3 results for each quantile

##      nep         rp    estimate
## 1  0.002   1.002004    1.673440
## 2  0.004   1.004016    3.451399
## 3  0.010   1.010101    9.005597
## 4  0.020   1.020408   18.642727
## 5  0.040   1.041667   38.688307
## 6  0.050   1.052632   48.971777
## 7  0.100   1.111111  102.127480
## 8  0.150   1.176471  157.397935
## 9  0.200   1.250000  214.289469
## 10 0.250   1.333333  272.569141
## 11 0.300   1.428571  332.108928
## 12 0.350   1.538462  392.836648
## 13 0.400   1.666667  454.715761
## 14 0.450   1.818182  517.736143
## 15 0.500   2.000000  581.910167
## 16 0.550   2.222222  647.272040
## 17 0.600   2.500000  713.879839
## 18 0.650   2.857143  781.820617
## 19 0.700   3.333333  851.219972
## 20 0.750   4.000000  922.259411
## 21 0.800   5.000000  995.209299
## 22 0.850   6.666667 1070.497971
## 23 0.900  10.000000 1148.883640
## 24 0.950  20.000000 1232.039458
## 25 0.960  25.000000 1249.585064
## 26 0.980  50.000000 1286.293526
## 27 0.990 100.000000 1306.028985
## 28 0.996 250.000000 1318.861101
## 29 0.998 500.000000 1323.520692

Parameter Values of the fitted log-pearson 3 distribution

## $name
## [1] "lp3"
## 
## $logTransformed
## [1] TRUE
## 
## $parameters
## $parameters$type
## [1] "pe3"
## 
## $parameters$para
##         mu      sigma      gamma 
##  2.6264915  0.4709338 -1.8950777 
## 
## $parameters$source
## [1] "parpe3"

Plot of Discharge vs Exceedance Probablities with lp3

The confidence interval was produced using bootstrap resampling.