tl1.2: Function to return the TL1 and TL2 hydrologic indicator...

In jlthomps/EflowStats: Returns HIT/HAT Hydrologic Indicator stats for a given set of data

Description

This function accepts a data frame that contains a column named "discharge" and calculates TL1; Julian date of annual minimum. Determine the Julian date that the minimum flow occurs for each water year. Transform the dates to relative values on a circular scale (radians or degrees). Compute the x and y components for each year and average them across all years. Compute the mean angle as the arc tangent of y-mean divided by x-mean. Transform the resultant angle back to Julian date (Julian day-spatial). and TL2; Variability in Julian date of annual minima. Compute the coefficient of variation for the mean x and y components and convert to a date (Julian day-spatial).

Usage

  tl1.2(qfiletempf)

Arguments

qfiletempf

data frame containing a "discharge" column containing daily flow values

Value

tl1.2 list containing TL1 and TL2 for the given data frame

Examples

qfiletempf<-sampleData
tl1.2(qfiletempf)

jlthomps/EflowStats documentation built on May 19, 2019, 12:48 p.m.