SI unit - BC precipitation

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swo
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SI unit - BC precipitation

swo
Dear forum,

I created a model with HEC-RAS501 in SI units to test the runoff due to precipitation. When I applied 60mm in 1h - which is not less I know - I recieved enormous values of discharge... 10000m3/s and more what definitly can not happen!
Is this a known issue in the current version of RAS5.01? I used US time/region settings for the system and German settings with the same result. When I run the example project Muncie in US customary units - no problem. Please give me some information to overcome this problem.
Thanks in advance
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Re: SI unit - BC precipitation

Mohsin
I need some help regarding adding the precipitation in the HEC-RAS.

1- What does the actual mean of time series of precipitation? Is it mean the accumulated rainfall?
for example

Date                                 Simulation time                             Precipitation (mm)
11-01-2019 07:00                   00:00                                               30
11-01-2019 08:00                   01:00                                               30
11-01-2019 09:00                   02:00                                               30

Does it mean the total rainfall added on the 2D flow area during the whole simulation time is 90 mm? Please elaborate?

Thanks