peak flow during analysis using rational method

[kris.vidya]

I have some question about calculation peak flow in junction and after junction

The result that I got is deferent, compared with manual calculation using excel 

It's seems no problem with peak flow before junction (same as manual calculation)

Example :

Junction 1 recieved flow from link-1 = 5.114 cms and link-2 = 2.517 cms , then junction 1 drain it to link-4 = 7.266 cms (using SSA)

when using manual (excel) : link-1 = 5.136 cms , link-2 = 2.585 cms , and link-4 = 9.037 cms

Note : TOC are almost same

Please tell me computation concept rational method using SSA

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Regards,

Krishna

[fcernst]

Please tell me computation concept rational method using SSA...

A dynamic flow routing model like SSA does not use a system TOC and sum of the CA's as is required to implement the Rational Method across multiple basins.

[kris.vidya]

so how SSA calculate peak flow from multiple basin ?

Thanks fcernst