subdaily daily monthly annual find data end time find data at start of simulation subdaily daily monthly annual don't store subdaily (ht1) - sum to get daily to save subdaily
convert m3/s -> m3 reset daily step and sum the daily hyd convert daily flow m3/s -> m3 -- other subdaily inputs are in t and kg
increment subdaily time step reset year, day, and subday at end of year daily monthly annual xwalk with exco file to get sequential number daily monthly annual