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I am just curious about the workflow that many of you use for runoff/stream analysis using a DEM and create a "water network" from the results in ArcGIS 10.1? I know the average rainfall for different seasons throughout the year, but that's really all I have to work with for my area.

I mainly want to investigate where water will "end up" given a fairly large rain event. I am guessing you would use ArcHydro for this? Is there a different software suite or suite of tools that you would recommend for this?

Thanks!

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Yes, I would use ArcHydro. I found a document on this page a while ago, that outlines some possible workflows (from the ArcHydro Team). There have been some changes compared to ArcMap 10.0 so for me it was quite useful.

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You should look into the Soil Water Assessment Tool (SWAT) for this type of analysis. It really depends on the soil types in your area along with temperature and topography. There are simpler ways to approximate your runoff (USLE method or the rational method), however it would be better if you could get more information.

http://swat.tamu.edu/

Good luck!

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