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Generate Streams from DEM

Question asked by clangridge1 on Sep 22, 2016
Latest reply on Oct 10, 2016 by acrawford-esristaff

Here is the some background. I am trying to create streams from DEM. The DEM data is LiDAR product, in 1 meter resolution. I exported a small area of the province. The number of raster cells = 1200million.  I did the hydroconditioning of the DEM, Fill and Flow Direction. All finished successfully within decent time. But the Flow Accumulation took 40 hours to finish.


I was watching an online video on ArcHydro. The presenter said that the tools can be run on any size of data from a watershed to a whole state or even a country.  I want to know how you would run the Flow Accumulation Tool for a state , in my case, a province.