depth:numeric, total rainfall amount of time series P1 [mm];
pDur:numeric, total rainfall duration of time series P1 [min];
CODr:numeric, rainwater chemical oxygen demand (COD) concentration [mg/l];
NH4r:numeric, rainwater ammonium (NH4) concentration [mg/l];
stat:character, raingauge station name for time series P1 [-];
delta.t:numeric, delta time for time series P1 [min];