get_effective_precipitation() — Get P_eff from P

Usage

from swb import get_effective_precipitation

get_effective_precipitation(timeseries)

timeseries is a pandas dataframe in daily step that contains a precipitation column and a ref_evapotranspiration (reference evapotranspiration) column. The function adds an effective_precipitation column to the data frame. This is calculated with a simple model: The effective precipitation is 0.8 times the precipitation, unless the daily precipitation is less than a fifth of the reference evapotranspiration, in which case the effective precipitation is zero.