soilDB (version 2.7.1)

waterDayYear: Compute Water Day and Year

Description

Compute "water" day and year, based on the end of the typical or legal dry season. This is September 30 in California.

Usage

waterDayYear(d, end = "09-30", format = "%Y-%m-%d", tz = "")

Arguments

d

anything the can be safely converted to POSIXlt

end

"MM-DD" notation for end of water year

format

Used in POSIXlt conversion. Default "%Y-%m-%d"

tz

Used in POSIXlt conversion for custom timezone. Default "" is current locale

Value

A data.frame object with the following

wy

the "water year"

wd

the "water day"

Details

This function doesn't know about leap-years. Probably worth checking.

References

Ideas borrowed from: https://github.com/USGS-R/dataRetrieval/issues/246 and https://stackoverflow.com/questions/48123049/create-day-index-based-on-water-year

Examples

# NOT RUN {
# try it
waterDayYear('2019-01-01')

# }