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problems in Hec-GeoHMS step


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Hi everyone!

I use the Hec-GeoHMS 10.1 tool in ArcGIS 10.1. I merged all subbasins into one basin, but trying to river merge all individual streams, I encountered problems.
The message from the above action is: disconnected rivers or rivers meeting at confluence can not be merged.
I would like to ask if there is an alternative methodology in order to merge them all in one.
Thank you in advance.
Edited by ssarch
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