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Editing and combining Arc Hydro's Hydro Networks

Question asked by Nlog10 on Dec 12, 2019

I have produced two Hydro Networks (junctions and edges) for two Lidar tiles, and now I'm trying to combing these feature classes without destroying any of the attribute data.

 

(Attached: "Capture")

 

In the attached image I have my two sets of tile junctions/edges. I removed the Hydro (Geometric) Network in order to use ArcMap's topology functions. After merging feature classes (X junctions merged to Y junctions / X lines merged to Y lines) I performed a series of "X features must not overlap Y features" and "no pseudo nodes" topology corrections. Through this, I was able to combine all the junctions and lines AND preserve all the original attribute information (with newly-calculated shape lengths, since some of the lines had been combined).

 

(Attached: "Capture2")

 

The problem is, I don't know how to put these junctions and lines "back" into a Hydro Network. The reason I'm interested in doing this is to use Utility Network Analyst to show flow direction for each of the lines. Is the Network even necessary? I suppose I don't really understand the functionality of these Hydro Networks.

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