- q_gvg(series, tmin=None, tmax=None, by_year=True)#
Gemiddeld Voorjaarsgrondwaterstand (GVG) also called MSGL (Mean Spring GW Level).
- Return type:
Approximated by taking the median of the values in the period between 14 March and 15 April (after resampling to daily values). This function does not care about series length!