How to define a constant rainfall?

[NicoSarton]

Hello everybody!

Could you explain me how to define a constant rain in SSA?

I had created a large network in Civil and imported it into SSA. In my network I have a lot of big watersheds. For each, I know the time of concentration.

Now I would like apply a constant rainfall (intensity 54mm / h during 60 min)?

Can you tell me which is the best hydrologic method? And how to define the intensity of rainfall (TS or IDF)?

Thank you!

Nico

[NicoSarton]

Maybe, I had found a solution... Using hydrology method method (Modified rational) and specify a storm duration of 60min...

[Hidden_Brain]

do you achieve what you need if you set up an IDF curve with the same rainfall intensity for all durations up to 60 minutes (5 mins, 10 mins....60 mins)?