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q_glg(series, tmin=None, tmax=None, q=0.06, by_year=True)[source]#

Gemiddeld Laagste Grondwaterstand (GLG) also called MLGL (Mean Low Groundwater Level).

  • series (pandas.Series) – Series to calculate the GLG for.

  • tmin (pandas.Timestamp, optional) –

  • tmax (pandas.Timestamp, optional) –

  • q (float, optional) – quantile, fraction of exceedance (default 0.06)

  • by_year (bool, optional) – Take average over quantiles per year (default True)

Return type



Approximated by taking quantiles of the time series values per year and calculating the mean of the quantiles. The series is first resampled to daily values.