I am working on modeling surface run-off (in ArcGIS 10.2) due to a rain event (e.g., 5 year rain for a duration of 30 mins.) over an approx. area of 30 km2 for which I have a DEM and necessary soil as well as land-cover data (Manning's n values).

I want to build my own model, but in the meantime want to ask if any open-source tool calculates run-off depth at defined time intervals? The final result would be to generate run-off depths at certain time intervals and generate a movie out of it. Would be great if you could share your experiences with the available open-source hydrological models.

  • You might want to look into Whitebox GAT. It's a cool spatial analysis toolkit and it's open source. Here's an answer on this site where the lead developer discusses applying Whitebox to a hydrology problem. You might also find the Whitebox blog to be interesting. – elrobis Apr 1 '15 at 13:30

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