Compute Water Day and Year

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 = "UTC")

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 "UTC"

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.

Author

D.E. Beaudette

Examples

# try it
waterDayYear('2019-01-01')
#>     wy wd
#> 1 2019 93