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Is there a tool that is effectively the inverse of flow accumulation of a pour point - as in, if I have a specific point that is the site of potential pollution, is there a tool which will show all cells that are downstream of it?

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    Please edit your post to include your version of Arc, and a detailed description of your data. Screenshots are often useful. Also, what have you tried so far, and what were the results?
    – Stu Smith
    Commented Mar 3, 2021 at 17:59
  • Cost path does it, but in some versions you need to convert flow direction into backlink raster
    – FelixIP
    Commented Mar 3, 2021 at 18:29

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