You said if 20 mm rain in 1 day we cannot operate until maybe 8 hours after rain stop - is that correct?
- In case of heavy rain we need to stop roughly 8 hour but in case of have rain and after sunny maybe take time less than 8 hour.
Why do you mark red line at 100mm of rain on the graphs and call this heavy rain?
If 20 or 30mm is enough to cause major stoppage, then 100 mm means nothing.
- Red line (100 mm - heavy rain) reference from Land Development Department if have rainfall amount more than 100 mm. be careful for land slide.
Don't hesitate if you have question.