?Watershed from specific leak point

[MikeGn]

Hello,

I built a watershed GP which can run over the whole terrain.

How can I make a GP which will calculate watershed from a specific point (a leak in the pipeline).

I want to calculate watershed for a case of pipeline leakage.

Thanks,

Mary

[ChrisDonohue__GISP]

Questions:

• Does "GP" stand for Geoprocessing Tool?
• Is it a requirement that this be done with ArcHydro?  If not, if you have access to the Spatial Analyst extension it can be done there.  First, one would develop the overall watershed model first for the potential area of effect (i.e. start with a Digital Elevation Model and run Fill, Flow Direction, Flow Accumulation, etc).   Then one would specifically derive the watershed for your leak point using Watershed (Spatial Analysis Toolbox), with the leak point being as the pour point.

How To: Create a watershed model using the Hydrology toolset 

How Watershed works—Help | ArcGIS for Desktop

Chris Donohue, GISP