ch_rfa_seasonstat {CSHShydRology}

Seasonal statistics for flood peaks

Description

Return the circular or seasonal statistics of flood peaks. The angle represents the mean timing of the floods and the radius its regularity. For example, a radius of one represents perfect regularity. Can perform the analyses on multiple sites.

Usage

ch_rfa_seasonstat(x, ...)

## S3 method for class 'data.frame'
ch_rfa_seasonstat(x, ...)

## S3 method for class 'formula'
ch_rfa_seasonstat(form, x, ...)

Arguments

x

Data. If data.frame with two columns, they must be respectively the date and a site variable.

...

Other parameters.

form

Formula that specifies the date and site variable. Must be of the form date ~ site.

Value

Returns the circular or seasonal statistics of flood peaks.

Author(s)

Martin Durocher

References

Burn, D.H. (1997). Catchment similarity for regional flood frequency analysis using seasonality measures. Journal of Hydrology 202, 212-230. https://doi.org/10.1016/S0022-1694(97)00068-1

See Also

ch_rfa_distseason

Examples

dt <- ch_rfa_extractamax(flow~date, CAN01AD002)$date

ch_rfa_seasonstat(dt)

## Illustration of the analysis of multiple sites

F0 <- function(ii) data.frame(site = ii, dt = sample(dt, replace = TRUE))
x <- lapply(1:10, F0)
x <- do.call(rbind, x)
           
st <- ch_rfa_seasonstat(dt ~ site, x)

ch_rfa_julianplot()
points(y ~ x, st, col = 2, pch = 16)