Adding separate distance files to calculate total distance in ArcGIS

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I have two raster files:

  1. A raster of distance-to-outlet for a creek. Value = 0 at creekoutlet (white), and the maximum value is at the beginning of the creek (black).
  2. A raster of Euclidean distances from the creek boundary. Distances arecalculated from creek boundary (red-green).


I need to create a third file that adds the Euclidean distances to the creek distances. Essentially, I need to scale the Euclidean distances per the creek distances, so the final file represents "total distance" to each point within the study area.

Any help would be greatly appreciated! Thanks in advance!



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