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Mean annual flow

Source: R/calcQA.R
calcQA.Rd

The mean annual flow is established from the mean of all available daily flows. A year is considered missing if more than 20% of the data is missing.

Usage

calcQA(x, threshold = 0.8, ...)

# S3 method for data.frame
calcQA(x, threshold = 0.8, ...)

Source

Chazot, Sébastien, Perrin, Charles, Jean-Philippe Vidal, Eric Sauquet, Mathilde Chauveau, et Nathalie Rouchy. 2012. « Explore 2070 - Lot Hydrologie de surface - A2 - Résultats : Fiches, Cartes et Graphes ». Ministère de l’écologie, du développement durable, des transports et du logement.

Arguments

x

a data.frame with a first column containing dates in POSIXt format and one numeric column per gauging station

threshold

numeric minimum ratio of available data in a year to take it into account

...

Use for S3 method compatibility

Value

A numeric named vector with the mean annual flow for each gauging station