construct_prob_plot: Construct probability plot using the Weibull plotting method

Description Usage Arguments Details References

View source: R/flood_val.R

Description

Construct probability plot using the Weibull plotting method

Usage

1

Arguments

vals

A numeric vector of annual peak discharge values obtained from the readNWISpeak function of the dataRetrieval package.

Details

The Weibull plotting method is commonly used in flood-frequency analysis. The basic procedure invovles ranking the values from highest to lowest and calculating an exceedence probability (p = rank / (n + 1)) where n is the total number of observations. The median annual flood (Q2) is the flow with a probability of 0.5.

References

Rao, A.R. and Hamed, K.H. 2000. Flood Frequency Analysis. CRC Press: Boca Raton.


countyfloods documentation built on Nov. 17, 2017, 5:15 a.m.