I would really appreciate any help finding some example data sets. However, to do so I need input data or basic data I can derive input from. Now, I would like to use Fill, Darcy Flow, and Flow Accumulation tools.

I was already lent some well data to show spatial distribution. My goal is to present a PowerPoint on what are these tools and show 'How To' with examples to a GIS Fundamentals course. Is there are way to bypass the Watershed Processing or trim it down if I already have the Watershed boundary? All I want in the end is a DrainageLine that has the drainage area populated.įor a for credit independent study, I am playing around with the Groundwater and Hydrology tools.

However, since I already have a watershed boundary is there an easier way to do this? Dropping points to delineate the watershed is too time intensive.

I stepped into the Watershed Processing section and I assumed if I were to get through all of that I would be able to use the tool above to populate the drainage area. I have a nice DrainageLine and now I need to get it to the point where I can assign the drainage area (Attribute Tools -> Populate Drainage Area for Drain Line). I used the NHDLines and DEM and blew through the Terrain Processing without issue. I decided to take a look at ArcHydro thinking that it may be a simpler process than with Hazus. We've been plugging away on a project here that involves using the NHDFlowlines with Hazus to generate good stream centerlines and populate them with the drainage area using a Lidar derived DEM and watershed boundary. Utlimate aim is to identify adjoint catchments over 10km2 threshold as providing cumulative catchment areas, and assigning longest flow paths and average basin slope for each of these adjoint catchments? I have read somewhere that it is possible to divide for regional based analysis, but can find no help on how one would go about this. I think it is due to the large number of catchments I am trying to generate stats for (> 10,000).Ĭan anyone out there advise on how best to subdivide the data/model to get this information (longest flow paths) out. clearning temporary workspace, increasing Raster rendering allocation, disabling background processing, etc) but with no luck. I have tried most of the tips and tricks found within this forum (i.e. However, I am coming unstuck at the Longest Flow Path for Catchments, where the software fails with an error message getting at available memory alloctaion. I have progressed through the Terrain Preprocessing toolbox, from DEM Reconditioning through to Adjoint Catchment Processing, on a DEM sized at 6,587x12,522 30m cells (320mb).

Arc hydro tools download