_RL exf_inscal_apressure
& exf_inscal_apressure,
I exf_inscal_apressure,
I apressureperiod, exf_inscal_apressure, apressureconst,
& exf_inscal_runoff, exf_inscal_apressure, exf_inscal_snowprecip,
exf_inscal_apressure = 1. _d 0