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How do you choose a threshold value for flow accumulation using the Con tool with a 1 meter DEM?

Question asked by a.stemen_mtn_bio on Jan 17, 2020

I am trying to identify stream networks of a certain area and also differentiate between ones with flowing water year round, intermittently and dry creek beds.  What kind of threshold value would I use for the Con tool Expression.  Online examples give 100 but that is way too small and has too large of an output of stream networks.   I don't want to go too high but also not too low.  My max upper value for the Flow Accum tool is 357399264.  If anyone has any advise I greatly appreciate it.  Thank you.

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