ma36.40: Function to return the MA36-MA40 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 columns named "discharge" and "month_val" and calculates MA36; variability across monthly flows. Compute the minimum, maximum, and mean flows for each month in the entire flow record. MA36 is the maximum monthly flow minus the minimum monthly flow divided by the median monthly flow (dimensionless-spatial). MA37; Variability across monthly flows. Compute the first (25th percentile) and the third (75th percentile) quartiles (every month in the flow record). MA37 is the third quartile minus the first quartile divided by the median of the monthly means (dimensionless-spatial). MA38; Variability across monthly flows. Compute the 10th and 90th percentiles for the monthly means (every month in the flow record). MA38 is the 90th percentile minus the 10th percentile divided by the median of the monthly means (dimensionless-spatial). MA39; Variability across monthly flows. Compute the standard deviation for the monthly means. MA39 is the standard deviation times 100 divided by the mean of the monthly means (percent-spatial). MA40; Skewness in the monthly flows. MA40 is the mean of the monthly flow means minus the median of the monthly means divided by the median of the monthly means (dimensionless-spatial).

Usage

  ma36.40(qfiletemp)

Arguments

qfiletemp

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

Value

ma36.40 list containing MA36-MA40 for the given data frame

Examples

qfiletempf<-sampleData
ma36.40(qfiletempf)

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