Just wondering if anyone has guidance on assessing rare events (e.g. 0.05% AEP) for durations shorter than 24hrs? I am looking at a catchment (3500 Ha) where the critical duration in the 1% AEP is 6hrs. I would guess that the peak duration for an 0.05% AEP would be around 12 - 18 hrs. However, I can't check any thing shorter than 24 hrs.
Any advice would be greatly appreciated.