_RL exf_inscal_hflux
& exf_inscal_hflux
& exf_inscal_hflux,
& hfluxfile, hfluxperiod, exf_inscal_hflux, hfluxmask,
& exf_inscal_hflux, exf_inscal_sflux, exf_inscal_evap,
exf_inscal_hflux = 1. _d 0