lagtime function

Lag time estimation

Estimate the lag time of the catchment.

lagtime(hl, ...)

## Default S3 method:
lagtime(hl, uc, ...)

## S3 method for class 'units'
lagtime(hl, uc, method = 1, ...)

## S3 method for class 'stars'
lagtime(hl, ...)

## S3 method for class 'transfR'
lagtime(hl, verbose = TRUE, ...)

Arguments

• hl: hydraulic length of class transfR or stars or matrix or vector. If no unit is provided, hl is assumed to be in [m].
• ...: further arguments passed to or from other methods
• uc: streamflow velocity. If no unit is provided, uc is assumed to be in [m/s].
• method: integer describing the method to use for lag time estimation. Possible values: 1 (see details).
• verbose: boolean indicating if information messages should be written to the console.

Returns

A numeric value of class units, or if hl is a transfR object, the same transfR object incremented by the "lagtime" attribute.

Details

The function estimates the lag time of the catchment. It can be used to estimate one of the inputs of the function rapriori . If method is 1, the lag time is estimated from the ratio of the mean hydraulic length (hl) and the average streamflow velocity (uc).

Examples

data(Oudon)
icatch <- 1
lagtime(Oudon$hl[[icatch]], uc = units::set_units(0.5, "m/s"))