1

I would like to determine the surface flow network, this based on the spatial analysis of DEM data and the creation of separate layers for surface ponds and preferential surface flow pathways. More accurate I would like delineation surface pond and surface flow pathway over urban areas based on DEM. I want to know what software I can automatically calculate?

  • 3
    Just to clarify, you want surface flow pathways for a DEM? Do you also need catchment areas? Since it's an urban area, is it necessary to consider a storm water drainage system? – Martin Jul 23 '13 at 12:13
  • Yes I want to determine surface flow pathway and surface pond, based on DEM and I construct catchment areas. Now, I want to determine only surface modeling, without coupled with drainage system. I want to create urban drainage modelling that requires a detailed representation of the overland flow network of ponds and pathways to reliably represent surface retention storage and flowpaths. – Andrea Jul 23 '13 at 20:46
2

I think there's an extension to ArcMap for what you want to do, even if that is a bit unclear to me. I would use Arc Hydro Tools, just make sure you get the latest version for 10.1 from the ftp (link at bottom).

You can find a number of partial workflows here for different situations.

AHT has the ability to include lakes and streams in the calculations, and it will return both catchment areas and flow paths based solely on the DEM.

If you need to include a drainage system, AHT doesn't have a functionality for this out of the box. I have done this by simulating the pipes as creeks (burn them in to the DEM with DEM Reconditioning), but there are probably alternative ways of accomplishing the same thing. It will assume you have a "sufficient amount" of inlets to the pipes in order for this generalization to be valid.

  • Thank you for answer. I will used ArcHydro tools I hope to solve the problem. – Andrea Jul 23 '13 at 21:25

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.