Oregon7Q10: Oregon 7Q10

Description Usage Arguments Details Examples

View source: R/Oregon7Q10.R

Description

This package contains a function returns the lowest seven-day average discharge expected once every 10 years based on a continuous record of data. The 7Q10 can reflect an annual, seasonal, or monthly statistic. Methods are consistent with the EPA's DFLOW methods.

Usage

1
2
3
Oregon7Q10(Station_ID, start_date, end_date, period = "Annual",
  custom_start = NA, custom_end = NA, wy_start = "10-01",
  method_type = "Both")

Arguments

Station_ID

Oregon Water Resources Divison (http://apps.wrd.state.or.us/apps/sw/hydro_near_real_time/) Station ID number

start_date

Start date, in the format of "mm/dd/yyyy", for the period of calculation. Make sure to include the quotations.

end_date

End date, in the format of "mm/dd/yyyy", for the period of calculation. Make sure to include the quotations.

period

The temporal scale for the 7Q10 calculation, can be "Annual" or "Custom". Default is "Annual". Make sure to include quotations.

custom_start

If "Custom" is designated as the period, the start date (excluding year) of the custom period in the character format of "mm-dd". Make sure to include quotations.

custom_end

If "Custom" is designated as the period, the end date (excluding year) of the custom period in the character format of "mm-dd". Make sure to include quotations.

wy_start

Only applicable for the "Annual" period. The water year beginning date (excluding year). The date should be in the character format of "mm-dd". If not specified the default is "10-01". Make sure to include quotations.

method_type

The method used to calculate 7Q10. Options are "Distribution Free", "log Pearson Type III", or "Both". Make sure to include quotations.

Details

https://www.epa.gov/waterdata/dflow

https://nepis.epa.gov/Exe/ZyPDF.cgi/30001JEH.PDF?Dockey=30001JEH.PD

http://deq1.bse.vt.edu/sifnwiki/index.php/Multiple_ways_to_calculate_7Q10

https://github.com/rmichie/DFLOW_R

Examples

1
Oregon7Q10(Station_ID, start_date, end_date, period = "Annual", custom_start = NA, custom_end = NA, wy_start = "10-01", method_type = "Both")

dsobota/Oregon7Q10 documentation built on Aug. 17, 2018, 6:13 p.m.