- 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!