topic Re: Flow direction with streams is missing in Water Resources Questions

Flow direction with streams is missing

AndrewFunk — Sat, 16 Nov 2013 04:10:12 GMT

I have Arc Hydro 10.2 x64 tools and ArcGIS Desktop 10.2. For some reason the "flow direction with streams" tool is missing from the Terrain Processing tools list. Anyone know what to do?

Re: Flow direction with streams is missing

ChristineDartiguenave — Fri, 13 Dec 2013 21:27:54 GMT

This tool has been replaced with the tool "Adjust Flow Direction in Streams", which takes as input a flow direction grid and a stream flow direction grid. This second input is created by the tool Create Drainage Line Structures.

Christine Dartiguenave
Esri Water Resources Team

Re: Flow direction with streams is missing

AlexAbbott — Tue, 07 Jan 2014 12:47:52 GMT

Christine, you may have explained this in the past, so please forgive me, but it has been years since I used this set of ArcHydro processes. Does use of the Adjust Flow Direction in Streams tool take the place of Terrain Preprocessing's DEM Reconditioning tool, or do they both need to be run to properly account for an existing stream network?

Re: Flow direction with streams is missing

ChristineDartiguenave — Wed, 15 Jan 2014 14:46:27 GMT

You need to run both functions. DEM Reconditioning will burn in the streams into the DEM. You can then fill the resulting DEM (as needed) before created the associated Flow Direction grid.

Then running Adjust Flow Direction in Stream will ensure that once the water reaches a stream it flows downsteam along the digitized stream direction and enforces the flow splits (if any).

Christine